author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Wed, 15 Apr 2009 15:56:17 +0000 | |
changeset 2185 | 09ca8e661728 |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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from django.db import connection, transaction |
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from django.db.models import signals, get_model |
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from django.db.models.fields import AutoField, Field, IntegerField, PositiveIntegerField, PositiveSmallIntegerField, FieldDoesNotExist |
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from django.db.models.related import RelatedObject |
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from django.db.models.query import QuerySet |
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from django.db.models.query_utils import QueryWrapper |
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from django.utils.encoding import smart_unicode |
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from django.utils.translation import ugettext_lazy, string_concat, ungettext, ugettext as _ |
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from django.utils.functional import curry |
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from django.core import exceptions |
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from django import forms |
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try: |
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set |
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except NameError: |
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from sets import Set as set # Python 2.3 fallback |
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RECURSIVE_RELATIONSHIP_CONSTANT = 'self' |
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pending_lookups = {} |
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def add_lazy_relation(cls, field, relation, operation): |
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""" |
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Adds a lookup on ``cls`` when a related field is defined using a string, |
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i.e.:: |
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class MyModel(Model): |
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fk = ForeignKey("AnotherModel") |
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This string can be: |
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* RECURSIVE_RELATIONSHIP_CONSTANT (i.e. "self") to indicate a recursive |
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relation. |
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* The name of a model (i.e "AnotherModel") to indicate another model in |
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the same app. |
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|
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* An app-label and model name (i.e. "someapp.AnotherModel") to indicate |
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another model in a different app. |
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If the other model hasn't yet been loaded -- almost a given if you're using |
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lazy relationships -- then the relation won't be set up until the |
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class_prepared signal fires at the end of model initialization. |
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operation is the work that must be performed once the relation can be resolved. |
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""" |
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# Check for recursive relations |
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if relation == RECURSIVE_RELATIONSHIP_CONSTANT: |
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app_label = cls._meta.app_label |
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model_name = cls.__name__ |
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else: |
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# Look for an "app.Model" relation |
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try: |
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app_label, model_name = relation.split(".") |
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except ValueError: |
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# If we can't split, assume a model in current app |
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app_label = cls._meta.app_label |
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model_name = relation |
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# Try to look up the related model, and if it's already loaded resolve the |
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# string right away. If get_model returns None, it means that the related |
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# model isn't loaded yet, so we need to pend the relation until the class |
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# is prepared. |
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model = get_model(app_label, model_name, False) |
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if model: |
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operation(field, model, cls) |
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else: |
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key = (app_label, model_name) |
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value = (cls, field, operation) |
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pending_lookups.setdefault(key, []).append(value) |
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def do_pending_lookups(sender, **kwargs): |
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""" |
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Handle any pending relations to the sending model. Sent from class_prepared. |
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""" |
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key = (sender._meta.app_label, sender.__name__) |
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for cls, field, operation in pending_lookups.pop(key, []): |
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operation(field, sender, cls) |
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signals.class_prepared.connect(do_pending_lookups) |
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#HACK |
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class RelatedField(object): |
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def contribute_to_class(self, cls, name): |
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sup = super(RelatedField, self) |
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# Add an accessor to allow easy determination of the related query path for this field |
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self.related_query_name = curry(self._get_related_query_name, cls._meta) |
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if hasattr(sup, 'contribute_to_class'): |
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sup.contribute_to_class(cls, name) |
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if not cls._meta.abstract and self.rel.related_name: |
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self.rel.related_name = self.rel.related_name % {'class': cls.__name__.lower()} |
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other = self.rel.to |
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if isinstance(other, basestring): |
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def resolve_related_class(field, model, cls): |
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field.rel.to = model |
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field.do_related_class(model, cls) |
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add_lazy_relation(cls, self, other, resolve_related_class) |
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else: |
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self.do_related_class(other, cls) |
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def set_attributes_from_rel(self): |
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self.name = self.name or (self.rel.to._meta.object_name.lower() + '_' + self.rel.to._meta.pk.name) |
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if self.verbose_name is None: |
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self.verbose_name = self.rel.to._meta.verbose_name |
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110 |
self.rel.field_name = self.rel.field_name or self.rel.to._meta.pk.name |
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111 |
|
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112 |
def do_related_class(self, other, cls): |
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113 |
self.set_attributes_from_rel() |
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114 |
related = RelatedObject(other, cls, self) |
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115 |
if not cls._meta.abstract: |
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116 |
self.contribute_to_related_class(other, related) |
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117 |
|
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118 |
def get_db_prep_lookup(self, lookup_type, value): |
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119 |
# If we are doing a lookup on a Related Field, we must be |
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120 |
# comparing object instances. The value should be the PK of value, |
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121 |
# not value itself. |
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122 |
def pk_trace(value): |
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123 |
# Value may be a primary key, or an object held in a relation. |
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124 |
# If it is an object, then we need to get the primary key value for |
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125 |
# that object. In certain conditions (especially one-to-one relations), |
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126 |
# the primary key may itself be an object - so we need to keep drilling |
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127 |
# down until we hit a value that can be used for a comparison. |
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128 |
v, field = value, None |
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129 |
try: |
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130 |
while True: |
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131 |
v, field = getattr(v, v._meta.pk.name), v._meta.pk |
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132 |
except AttributeError: |
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133 |
pass |
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134 |
if field: |
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135 |
if lookup_type in ('range', 'in'): |
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136 |
v = [v] |
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137 |
v = field.get_db_prep_lookup(lookup_type, v) |
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138 |
if isinstance(v, list): |
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139 |
v = v[0] |
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140 |
return v |
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141 |
|
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142 |
if hasattr(value, 'as_sql'): |
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143 |
sql, params = value.as_sql() |
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144 |
return QueryWrapper(('(%s)' % sql), params) |
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145 |
|
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146 |
# FIXME: lt and gt are explicitally allowed to make |
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147 |
# get_(next/prev)_by_date work; other lookups are not allowed since that |
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148 |
# gets messy pretty quick. This is a good candidate for some refactoring |
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149 |
# in the future. |
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150 |
if lookup_type in ['exact', 'gt', 'lt']: |
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151 |
return [pk_trace(value)] |
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152 |
if lookup_type in ('range', 'in'): |
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153 |
return [pk_trace(v) for v in value] |
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154 |
elif lookup_type == 'isnull': |
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155 |
return [] |
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156 |
raise TypeError, "Related Field has invalid lookup: %s" % lookup_type |
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157 |
|
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158 |
def _get_related_query_name(self, opts): |
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159 |
# This method defines the name that can be used to identify this |
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160 |
# related object in a table-spanning query. It uses the lower-cased |
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161 |
# object_name by default, but this can be overridden with the |
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162 |
# "related_name" option. |
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163 |
return self.rel.related_name or opts.object_name.lower() |
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164 |
|
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165 |
class SingleRelatedObjectDescriptor(object): |
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166 |
# This class provides the functionality that makes the related-object |
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167 |
# managers available as attributes on a model class, for fields that have |
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168 |
# a single "remote" value, on the class pointed to by a related field. |
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169 |
# In the example "place.restaurant", the restaurant attribute is a |
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170 |
# SingleRelatedObjectDescriptor instance. |
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171 |
def __init__(self, related): |
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172 |
self.related = related |
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173 |
self.cache_name = '_%s_cache' % related.get_accessor_name() |
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174 |
|
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175 |
def __get__(self, instance, instance_type=None): |
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176 |
if instance is None: |
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177 |
raise AttributeError, "%s must be accessed via instance" % self.related.opts.object_name |
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178 |
|
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179 |
try: |
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180 |
return getattr(instance, self.cache_name) |
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181 |
except AttributeError: |
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182 |
params = {'%s__pk' % self.related.field.name: instance._get_pk_val()} |
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183 |
rel_obj = self.related.model._default_manager.get(**params) |
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184 |
setattr(instance, self.cache_name, rel_obj) |
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185 |
return rel_obj |
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186 |
|
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187 |
def __set__(self, instance, value): |
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188 |
if instance is None: |
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189 |
raise AttributeError, "%s must be accessed via instance" % self.related.opts.object_name |
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190 |
|
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191 |
# The similarity of the code below to the code in |
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192 |
# ReverseSingleRelatedObjectDescriptor is annoying, but there's a bunch |
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193 |
# of small differences that would make a common base class convoluted. |
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194 |
|
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195 |
# If null=True, we can assign null here, but otherwise the value needs |
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196 |
# to be an instance of the related class. |
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197 |
if value is None and self.related.field.null == False: |
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198 |
raise ValueError('Cannot assign None: "%s.%s" does not allow null values.' % |
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199 |
(instance._meta.object_name, self.related.get_accessor_name())) |
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200 |
elif value is not None and not isinstance(value, self.related.model): |
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201 |
raise ValueError('Cannot assign "%r": "%s.%s" must be a "%s" instance.' % |
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202 |
(value, instance._meta.object_name, |
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203 |
self.related.get_accessor_name(), self.related.opts.object_name)) |
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204 |
|
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205 |
# Set the value of the related field |
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206 |
setattr(value, self.related.field.rel.get_related_field().attname, instance) |
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207 |
|
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208 |
# Since we already know what the related object is, seed the related |
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209 |
# object caches now, too. This avoids another db hit if you get the |
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210 |
# object you just set. |
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211 |
setattr(instance, self.cache_name, value) |
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212 |
setattr(value, self.related.field.get_cache_name(), instance) |
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213 |
|
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214 |
class ReverseSingleRelatedObjectDescriptor(object): |
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215 |
# This class provides the functionality that makes the related-object |
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216 |
# managers available as attributes on a model class, for fields that have |
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217 |
# a single "remote" value, on the class that defines the related field. |
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|
218 |
# In the example "choice.poll", the poll attribute is a |
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219 |
# ReverseSingleRelatedObjectDescriptor instance. |
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220 |
def __init__(self, field_with_rel): |
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self.field = field_with_rel |
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222 |
|
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223 |
def __get__(self, instance, instance_type=None): |
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224 |
if instance is None: |
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225 |
raise AttributeError, "%s must be accessed via instance" % self.field.name |
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226 |
cache_name = self.field.get_cache_name() |
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227 |
try: |
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228 |
return getattr(instance, cache_name) |
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229 |
except AttributeError: |
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230 |
val = getattr(instance, self.field.attname) |
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231 |
if val is None: |
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232 |
# If NULL is an allowed value, return it. |
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233 |
if self.field.null: |
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234 |
return None |
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235 |
raise self.field.rel.to.DoesNotExist |
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236 |
other_field = self.field.rel.get_related_field() |
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237 |
if other_field.rel: |
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238 |
params = {'%s__pk' % self.field.rel.field_name: val} |
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239 |
else: |
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240 |
params = {'%s__exact' % self.field.rel.field_name: val} |
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241 |
|
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242 |
# If the related manager indicates that it should be used for |
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243 |
# related fields, respect that. |
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244 |
rel_mgr = self.field.rel.to._default_manager |
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245 |
if getattr(rel_mgr, 'use_for_related_fields', False): |
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246 |
rel_obj = rel_mgr.get(**params) |
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247 |
else: |
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248 |
rel_obj = QuerySet(self.field.rel.to).get(**params) |
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setattr(instance, cache_name, rel_obj) |
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250 |
return rel_obj |
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251 |
|
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252 |
def __set__(self, instance, value): |
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253 |
if instance is None: |
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254 |
raise AttributeError, "%s must be accessed via instance" % self._field.name |
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255 |
|
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256 |
# If null=True, we can assign null here, but otherwise the value needs |
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257 |
# to be an instance of the related class. |
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258 |
if value is None and self.field.null == False: |
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259 |
raise ValueError('Cannot assign None: "%s.%s" does not allow null values.' % |
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260 |
(instance._meta.object_name, self.field.name)) |
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261 |
elif value is not None and not isinstance(value, self.field.rel.to): |
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262 |
raise ValueError('Cannot assign "%r": "%s.%s" must be a "%s" instance.' % |
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263 |
(value, instance._meta.object_name, |
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264 |
self.field.name, self.field.rel.to._meta.object_name)) |
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|
265 |
|
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266 |
# Set the value of the related field |
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|
267 |
try: |
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268 |
val = getattr(value, self.field.rel.get_related_field().attname) |
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|
269 |
except AttributeError: |
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270 |
val = None |
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271 |
setattr(instance, self.field.attname, val) |
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272 |
|
323
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|
273 |
# Since we already know what the related object is, seed the related |
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|
274 |
# object cache now, too. This avoids another db hit if you get the |
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275 |
# object you just set. |
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276 |
setattr(instance, self.field.get_cache_name(), value) |
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277 |
|
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278 |
class ForeignRelatedObjectsDescriptor(object): |
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279 |
# This class provides the functionality that makes the related-object |
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280 |
# managers available as attributes on a model class, for fields that have |
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281 |
# multiple "remote" values and have a ForeignKey pointed at them by |
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282 |
# some other model. In the example "poll.choice_set", the choice_set |
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283 |
# attribute is a ForeignRelatedObjectsDescriptor instance. |
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284 |
def __init__(self, related): |
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285 |
self.related = related # RelatedObject instance |
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286 |
|
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287 |
def __get__(self, instance, instance_type=None): |
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|
288 |
if instance is None: |
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|
289 |
raise AttributeError, "Manager must be accessed via instance" |
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|
290 |
|
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291 |
rel_field = self.related.field |
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292 |
rel_model = self.related.model |
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|
293 |
|
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294 |
# Dynamically create a class that subclasses the related |
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295 |
# model's default manager. |
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296 |
superclass = self.related.model._default_manager.__class__ |
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297 |
|
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298 |
class RelatedManager(superclass): |
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299 |
def get_query_set(self): |
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300 |
return superclass.get_query_set(self).filter(**(self.core_filters)) |
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301 |
|
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302 |
def add(self, *objs): |
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303 |
for obj in objs: |
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304 |
setattr(obj, rel_field.name, instance) |
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305 |
obj.save() |
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306 |
add.alters_data = True |
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|
307 |
|
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|
308 |
def create(self, **kwargs): |
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309 |
kwargs.update({rel_field.name: instance}) |
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|
310 |
return super(RelatedManager, self).create(**kwargs) |
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311 |
create.alters_data = True |
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312 |
|
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|
313 |
def get_or_create(self, **kwargs): |
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314 |
# Update kwargs with the related object that this |
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|
315 |
# ForeignRelatedObjectsDescriptor knows about. |
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|
316 |
kwargs.update({rel_field.name: instance}) |
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317 |
return super(RelatedManager, self).get_or_create(**kwargs) |
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|
318 |
get_or_create.alters_data = True |
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|
319 |
|
54
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320 |
# remove() and clear() are only provided if the ForeignKey can have a value of null. |
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|
321 |
if rel_field.null: |
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322 |
def remove(self, *objs): |
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|
323 |
val = getattr(instance, rel_field.rel.get_related_field().attname) |
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324 |
for obj in objs: |
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|
325 |
# Is obj actually part of this descriptor set? |
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326 |
if getattr(obj, rel_field.attname) == val: |
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327 |
setattr(obj, rel_field.name, None) |
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|
328 |
obj.save() |
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|
329 |
else: |
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330 |
raise rel_field.rel.to.DoesNotExist, "%r is not related to %r." % (obj, instance) |
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|
331 |
remove.alters_data = True |
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|
332 |
|
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333 |
def clear(self): |
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|
334 |
for obj in self.all(): |
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|
335 |
setattr(obj, rel_field.name, None) |
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336 |
obj.save() |
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|
337 |
clear.alters_data = True |
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|
338 |
|
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|
339 |
manager = RelatedManager() |
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|
340 |
attname = rel_field.rel.get_related_field().name |
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|
341 |
manager.core_filters = {'%s__%s' % (rel_field.name, attname): |
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|
342 |
getattr(instance, attname)} |
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|
343 |
manager.model = self.related.model |
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|
344 |
|
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345 |
return manager |
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346 |
|
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|
347 |
def __set__(self, instance, value): |
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348 |
if instance is None: |
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|
349 |
raise AttributeError, "Manager must be accessed via instance" |
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|
350 |
|
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|
351 |
manager = self.__get__(instance) |
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|
352 |
# If the foreign key can support nulls, then completely clear the related set. |
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|
353 |
# Otherwise, just move the named objects into the set. |
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|
354 |
if self.related.field.null: |
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|
355 |
manager.clear() |
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|
356 |
manager.add(*value) |
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|
357 |
|
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|
358 |
def create_many_related_manager(superclass, through=False): |
54
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359 |
"""Creates a manager that subclasses 'superclass' (which is a Manager) |
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|
360 |
and adds behavior for many-to-many related objects.""" |
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|
361 |
class ManyRelatedManager(superclass): |
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|
362 |
def __init__(self, model=None, core_filters=None, instance=None, symmetrical=None, |
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363 |
join_table=None, source_col_name=None, target_col_name=None): |
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|
364 |
super(ManyRelatedManager, self).__init__() |
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|
365 |
self.core_filters = core_filters |
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366 |
self.model = model |
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|
367 |
self.symmetrical = symmetrical |
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|
368 |
self.instance = instance |
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|
369 |
self.join_table = join_table |
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|
370 |
self.source_col_name = source_col_name |
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|
371 |
self.target_col_name = target_col_name |
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|
372 |
self.through = through |
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373 |
self._pk_val = self.instance._get_pk_val() |
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|
374 |
if self._pk_val is None: |
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|
375 |
raise ValueError("%r instance needs to have a primary key value before a many-to-many relationship can be used." % instance.__class__.__name__) |
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|
376 |
|
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|
377 |
def get_query_set(self): |
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|
378 |
return superclass.get_query_set(self)._next_is_sticky().filter(**(self.core_filters)) |
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|
379 |
|
323
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|
380 |
# If the ManyToMany relation has an intermediary model, |
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|
381 |
# the add and remove methods do not exist. |
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|
382 |
if through is None: |
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|
383 |
def add(self, *objs): |
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|
384 |
self._add_items(self.source_col_name, self.target_col_name, *objs) |
54
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|
385 |
|
323
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|
386 |
# If this is a symmetrical m2m relation to self, add the mirror entry in the m2m table |
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|
387 |
if self.symmetrical: |
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|
388 |
self._add_items(self.target_col_name, self.source_col_name, *objs) |
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|
389 |
add.alters_data = True |
54
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changeset
|
390 |
|
323
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changeset
|
391 |
def remove(self, *objs): |
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changeset
|
392 |
self._remove_items(self.source_col_name, self.target_col_name, *objs) |
54
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|
393 |
|
323
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changeset
|
394 |
# If this is a symmetrical m2m relation to self, remove the mirror entry in the m2m table |
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changeset
|
395 |
if self.symmetrical: |
ff1a9aa48cfd
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diff
changeset
|
396 |
self._remove_items(self.target_col_name, self.source_col_name, *objs) |
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changeset
|
397 |
remove.alters_data = True |
54
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changeset
|
398 |
|
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Major reorganization of the soc svn repo, to merge into a single App Engine
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changeset
|
399 |
def clear(self): |
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|
400 |
self._clear_items(self.source_col_name) |
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changeset
|
401 |
|
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changeset
|
402 |
# If this is a symmetrical m2m relation to self, clear the mirror entry in the m2m table |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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changeset
|
403 |
if self.symmetrical: |
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changeset
|
404 |
self._clear_items(self.target_col_name) |
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parents:
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changeset
|
405 |
clear.alters_data = True |
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changeset
|
406 |
|
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Major reorganization of the soc svn repo, to merge into a single App Engine
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|
407 |
def create(self, **kwargs): |
323
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changeset
|
408 |
# This check needs to be done here, since we can't later remove this |
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changeset
|
409 |
# from the method lookup table, as we do with add and remove. |
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changeset
|
410 |
if through is not None: |
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Load ../vendor/django into trunk/app/django.
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diff
changeset
|
411 |
raise AttributeError, "Cannot use create() on a ManyToManyField which specifies an intermediary model. Use %s's Manager instead." % through |
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changeset
|
412 |
new_obj = super(ManyRelatedManager, self).create(**kwargs) |
54
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parents:
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|
413 |
self.add(new_obj) |
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|
414 |
return new_obj |
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changeset
|
415 |
create.alters_data = True |
03e267d67478
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changeset
|
416 |
|
323
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changeset
|
417 |
def get_or_create(self, **kwargs): |
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|
418 |
obj, created = \ |
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diff
changeset
|
419 |
super(ManyRelatedManager, self).get_or_create(**kwargs) |
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changeset
|
420 |
# We only need to add() if created because if we got an object back |
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|
421 |
# from get() then the relationship already exists. |
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changeset
|
422 |
if created: |
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changeset
|
423 |
self.add(obj) |
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diff
changeset
|
424 |
return obj, created |
ff1a9aa48cfd
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changeset
|
425 |
get_or_create.alters_data = True |
ff1a9aa48cfd
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changeset
|
426 |
|
54
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changeset
|
427 |
def _add_items(self, source_col_name, target_col_name, *objs): |
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changeset
|
428 |
# join_table: name of the m2m link table |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
diff
changeset
|
429 |
# source_col_name: the PK colname in join_table for the source object |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
diff
changeset
|
430 |
# target_col_name: the PK colname in join_table for the target object |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
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changeset
|
431 |
# *objs - objects to add. Either object instances, or primary keys of object instances. |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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changeset
|
432 |
|
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Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
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changeset
|
433 |
# If there aren't any objects, there is nothing to do. |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
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changeset
|
434 |
if objs: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
diff
changeset
|
435 |
# Check that all the objects are of the right type |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
diff
changeset
|
436 |
new_ids = set() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
437 |
for obj in objs: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
438 |
if isinstance(obj, self.model): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
439 |
new_ids.add(obj._get_pk_val()) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
440 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
441 |
new_ids.add(obj) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
442 |
# Add the newly created or already existing objects to the join table. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
443 |
# First find out which items are already added, to avoid adding them twice |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
444 |
cursor = connection.cursor() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
445 |
cursor.execute("SELECT %s FROM %s WHERE %s = %%s AND %s IN (%s)" % \ |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
446 |
(target_col_name, self.join_table, source_col_name, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
447 |
target_col_name, ",".join(['%s'] * len(new_ids))), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
448 |
[self._pk_val] + list(new_ids)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
449 |
existing_ids = set([row[0] for row in cursor.fetchall()]) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
450 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
451 |
# Add the ones that aren't there already |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
452 |
for obj_id in (new_ids - existing_ids): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
453 |
cursor.execute("INSERT INTO %s (%s, %s) VALUES (%%s, %%s)" % \ |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
454 |
(self.join_table, source_col_name, target_col_name), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
455 |
[self._pk_val, obj_id]) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
456 |
transaction.commit_unless_managed() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
457 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
458 |
def _remove_items(self, source_col_name, target_col_name, *objs): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
459 |
# source_col_name: the PK colname in join_table for the source object |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
460 |
# target_col_name: the PK colname in join_table for the target object |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
461 |
# *objs - objects to remove |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
462 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
463 |
# If there aren't any objects, there is nothing to do. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
464 |
if objs: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
465 |
# Check that all the objects are of the right type |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
466 |
old_ids = set() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
467 |
for obj in objs: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
468 |
if isinstance(obj, self.model): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
469 |
old_ids.add(obj._get_pk_val()) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
470 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
471 |
old_ids.add(obj) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
472 |
# Remove the specified objects from the join table |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
473 |
cursor = connection.cursor() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
474 |
cursor.execute("DELETE FROM %s WHERE %s = %%s AND %s IN (%s)" % \ |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
475 |
(self.join_table, source_col_name, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
476 |
target_col_name, ",".join(['%s'] * len(old_ids))), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
477 |
[self._pk_val] + list(old_ids)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
478 |
transaction.commit_unless_managed() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
479 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
480 |
def _clear_items(self, source_col_name): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
481 |
# source_col_name: the PK colname in join_table for the source object |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
482 |
cursor = connection.cursor() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
483 |
cursor.execute("DELETE FROM %s WHERE %s = %%s" % \ |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
484 |
(self.join_table, source_col_name), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
485 |
[self._pk_val]) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
486 |
transaction.commit_unless_managed() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
487 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
488 |
return ManyRelatedManager |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
489 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
490 |
class ManyRelatedObjectsDescriptor(object): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
491 |
# This class provides the functionality that makes the related-object |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
492 |
# managers available as attributes on a model class, for fields that have |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
493 |
# multiple "remote" values and have a ManyToManyField pointed at them by |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
494 |
# some other model (rather than having a ManyToManyField themselves). |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
495 |
# In the example "publication.article_set", the article_set attribute is a |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
496 |
# ManyRelatedObjectsDescriptor instance. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
497 |
def __init__(self, related): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
498 |
self.related = related # RelatedObject instance |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
499 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
500 |
def __get__(self, instance, instance_type=None): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
501 |
if instance is None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
502 |
raise AttributeError, "Manager must be accessed via instance" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
503 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
504 |
# Dynamically create a class that subclasses the related |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
505 |
# model's default manager. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
506 |
rel_model = self.related.model |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
507 |
superclass = rel_model._default_manager.__class__ |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
508 |
RelatedManager = create_many_related_manager(superclass, self.related.field.rel.through) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
509 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
510 |
qn = connection.ops.quote_name |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
511 |
manager = RelatedManager( |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
512 |
model=rel_model, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
513 |
core_filters={'%s__pk' % self.related.field.name: instance._get_pk_val()}, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
514 |
instance=instance, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
515 |
symmetrical=False, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
516 |
join_table=qn(self.related.field.m2m_db_table()), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
517 |
source_col_name=qn(self.related.field.m2m_reverse_name()), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
518 |
target_col_name=qn(self.related.field.m2m_column_name()) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
519 |
) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
520 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
521 |
return manager |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
522 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
523 |
def __set__(self, instance, value): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
524 |
if instance is None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
525 |
raise AttributeError, "Manager must be accessed via instance" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
526 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
527 |
through = getattr(self.related.field.rel, 'through', None) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
528 |
if through is not None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
529 |
raise AttributeError, "Cannot set values on a ManyToManyField which specifies an intermediary model. Use %s's Manager instead." % through |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
530 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
531 |
manager = self.__get__(instance) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
532 |
manager.clear() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
533 |
manager.add(*value) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
534 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
535 |
class ReverseManyRelatedObjectsDescriptor(object): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
536 |
# This class provides the functionality that makes the related-object |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
537 |
# managers available as attributes on a model class, for fields that have |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
538 |
# multiple "remote" values and have a ManyToManyField defined in their |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
539 |
# model (rather than having another model pointed *at* them). |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
540 |
# In the example "article.publications", the publications attribute is a |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
541 |
# ReverseManyRelatedObjectsDescriptor instance. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
542 |
def __init__(self, m2m_field): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
543 |
self.field = m2m_field |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
544 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
545 |
def __get__(self, instance, instance_type=None): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
546 |
if instance is None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
547 |
raise AttributeError, "Manager must be accessed via instance" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
548 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
549 |
# Dynamically create a class that subclasses the related |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
550 |
# model's default manager. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
551 |
rel_model=self.field.rel.to |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
552 |
superclass = rel_model._default_manager.__class__ |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
553 |
RelatedManager = create_many_related_manager(superclass, self.field.rel.through) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
554 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
555 |
qn = connection.ops.quote_name |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
556 |
manager = RelatedManager( |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
557 |
model=rel_model, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
558 |
core_filters={'%s__pk' % self.field.related_query_name(): instance._get_pk_val()}, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
559 |
instance=instance, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
560 |
symmetrical=(self.field.rel.symmetrical and instance.__class__ == rel_model), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
561 |
join_table=qn(self.field.m2m_db_table()), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
562 |
source_col_name=qn(self.field.m2m_column_name()), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
563 |
target_col_name=qn(self.field.m2m_reverse_name()) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
564 |
) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
565 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
566 |
return manager |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
567 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
568 |
def __set__(self, instance, value): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
569 |
if instance is None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
570 |
raise AttributeError, "Manager must be accessed via instance" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
571 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
572 |
through = getattr(self.field.rel, 'through', None) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
573 |
if through is not None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
574 |
raise AttributeError, "Cannot set values on a ManyToManyField which specifies an intermediary model. Use %s's Manager instead." % through |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
575 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
576 |
manager = self.__get__(instance) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
577 |
manager.clear() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
578 |
manager.add(*value) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
579 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
580 |
class ManyToOneRel(object): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
581 |
def __init__(self, to, field_name, related_name=None, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
582 |
limit_choices_to=None, lookup_overrides=None, parent_link=False): |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
583 |
try: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
584 |
to._meta |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
585 |
except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
586 |
assert isinstance(to, basestring), "'to' must be either a model, a model name or the string %r" % RECURSIVE_RELATIONSHIP_CONSTANT |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
587 |
self.to, self.field_name = to, field_name |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
588 |
self.related_name = related_name |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
589 |
if limit_choices_to is None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
590 |
limit_choices_to = {} |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
591 |
self.limit_choices_to = limit_choices_to |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
592 |
self.lookup_overrides = lookup_overrides or {} |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
593 |
self.multiple = True |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
594 |
self.parent_link = parent_link |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
595 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
596 |
def get_related_field(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
597 |
""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
598 |
Returns the Field in the 'to' object to which this relationship is |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
599 |
tied. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
600 |
""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
601 |
data = self.to._meta.get_field_by_name(self.field_name) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
602 |
if not data[2]: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
603 |
raise FieldDoesNotExist("No related field named '%s'" % |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
604 |
self.field_name) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
605 |
return data[0] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
606 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
607 |
class OneToOneRel(ManyToOneRel): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
608 |
def __init__(self, to, field_name, related_name=None, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
609 |
limit_choices_to=None, lookup_overrides=None, parent_link=False): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
610 |
super(OneToOneRel, self).__init__(to, field_name, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
611 |
related_name=related_name, limit_choices_to=limit_choices_to, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
612 |
lookup_overrides=lookup_overrides, parent_link=parent_link) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
613 |
self.multiple = False |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
614 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
615 |
class ManyToManyRel(object): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
616 |
def __init__(self, to, related_name=None, limit_choices_to=None, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
617 |
symmetrical=True, through=None): |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
618 |
self.to = to |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
619 |
self.related_name = related_name |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
620 |
if limit_choices_to is None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
621 |
limit_choices_to = {} |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
622 |
self.limit_choices_to = limit_choices_to |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
623 |
self.symmetrical = symmetrical |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
624 |
self.multiple = True |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
625 |
self.through = through |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
626 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
627 |
class ForeignKey(RelatedField, Field): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
628 |
empty_strings_allowed = False |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
629 |
def __init__(self, to, to_field=None, rel_class=ManyToOneRel, **kwargs): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
630 |
try: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
631 |
to_name = to._meta.object_name.lower() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
632 |
except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
633 |
assert isinstance(to, basestring), "%s(%r) is invalid. First parameter to ForeignKey must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
634 |
else: |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
635 |
assert not to._meta.abstract, "%s cannot define a relation with abstract class %s" % (self.__class__.__name__, to._meta.object_name) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
636 |
to_field = to_field or to._meta.pk.name |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
637 |
kwargs['verbose_name'] = kwargs.get('verbose_name', None) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
638 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
639 |
kwargs['rel'] = rel_class(to, to_field, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
640 |
related_name=kwargs.pop('related_name', None), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
641 |
limit_choices_to=kwargs.pop('limit_choices_to', None), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
642 |
lookup_overrides=kwargs.pop('lookup_overrides', None), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
643 |
parent_link=kwargs.pop('parent_link', False)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
644 |
Field.__init__(self, **kwargs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
645 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
646 |
self.db_index = True |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
647 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
648 |
def get_attname(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
649 |
return '%s_id' % self.name |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
650 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
651 |
def get_validator_unique_lookup_type(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
652 |
return '%s__%s__exact' % (self.name, self.rel.get_related_field().name) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
653 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
654 |
def get_default(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
655 |
"Here we check if the default value is an object and return the to_field if so." |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
656 |
field_default = super(ForeignKey, self).get_default() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
657 |
if isinstance(field_default, self.rel.to): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
658 |
return getattr(field_default, self.rel.get_related_field().attname) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
659 |
return field_default |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
660 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
661 |
def get_db_prep_save(self, value): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
662 |
if value == '' or value == None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
663 |
return None |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
664 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
665 |
return self.rel.get_related_field().get_db_prep_save(value) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
666 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
667 |
def value_to_string(self, obj): |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
668 |
if not obj: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
669 |
# In required many-to-one fields with only one available choice, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
670 |
# select that one available choice. Note: For SelectFields |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
671 |
# we have to check that the length of choices is *2*, not 1, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
672 |
# because SelectFields always have an initial "blank" value. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
673 |
if not self.blank and self.choices: |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
674 |
choice_list = self.get_choices_default() |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
675 |
if len(choice_list) == 2: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
676 |
return smart_unicode(choice_list[1][0]) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
677 |
return Field.value_to_string(self, obj) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
678 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
679 |
def contribute_to_class(self, cls, name): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
680 |
super(ForeignKey, self).contribute_to_class(cls, name) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
681 |
setattr(cls, self.name, ReverseSingleRelatedObjectDescriptor(self)) |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
682 |
if isinstance(self.rel.to, basestring): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
683 |
target = self.rel.to |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
684 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
685 |
target = self.rel.to._meta.db_table |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
686 |
cls._meta.duplicate_targets[self.column] = (target, "o2m") |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
687 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
688 |
def contribute_to_related_class(self, cls, related): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
689 |
setattr(cls, related.get_accessor_name(), ForeignRelatedObjectsDescriptor(related)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
690 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
691 |
def formfield(self, **kwargs): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
692 |
defaults = { |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
693 |
'form_class': forms.ModelChoiceField, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
694 |
'queryset': self.rel.to._default_manager.complex_filter( |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
695 |
self.rel.limit_choices_to), |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
696 |
'to_field_name': self.rel.field_name, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
697 |
} |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
698 |
defaults.update(kwargs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
699 |
return super(ForeignKey, self).formfield(**defaults) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
700 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
701 |
def db_type(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
702 |
# The database column type of a ForeignKey is the column type |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
703 |
# of the field to which it points. An exception is if the ForeignKey |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
704 |
# points to an AutoField/PositiveIntegerField/PositiveSmallIntegerField, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
705 |
# in which case the column type is simply that of an IntegerField. |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
706 |
# If the database needs similar types for key fields however, the only |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
707 |
# thing we can do is making AutoField an IntegerField. |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
708 |
rel_field = self.rel.get_related_field() |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
709 |
if (isinstance(rel_field, AutoField) or |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
710 |
(not connection.features.related_fields_match_type and |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
711 |
isinstance(rel_field, (PositiveIntegerField, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
712 |
PositiveSmallIntegerField)))): |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
713 |
return IntegerField().db_type() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
714 |
return rel_field.db_type() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
715 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
716 |
class OneToOneField(ForeignKey): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
717 |
""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
718 |
A OneToOneField is essentially the same as a ForeignKey, with the exception |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
719 |
that always carries a "unique" constraint with it and the reverse relation |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
720 |
always returns the object pointed to (since there will only ever be one), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
721 |
rather than returning a list. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
722 |
""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
723 |
def __init__(self, to, to_field=None, **kwargs): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
724 |
kwargs['unique'] = True |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
725 |
super(OneToOneField, self).__init__(to, to_field, OneToOneRel, **kwargs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
726 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
727 |
def contribute_to_related_class(self, cls, related): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
728 |
setattr(cls, related.get_accessor_name(), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
729 |
SingleRelatedObjectDescriptor(related)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
730 |
if not cls._meta.one_to_one_field: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
731 |
cls._meta.one_to_one_field = self |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
732 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
733 |
def formfield(self, **kwargs): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
734 |
if self.rel.parent_link: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
735 |
return None |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
736 |
return super(OneToOneField, self).formfield(**kwargs) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
737 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
738 |
class ManyToManyField(RelatedField, Field): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
739 |
def __init__(self, to, **kwargs): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
740 |
try: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
741 |
assert not to._meta.abstract, "%s cannot define a relation with abstract class %s" % (self.__class__.__name__, to._meta.object_name) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
742 |
except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
743 |
assert isinstance(to, basestring), "%s(%r) is invalid. First parameter to ManyToManyField must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
744 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
745 |
kwargs['verbose_name'] = kwargs.get('verbose_name', None) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
746 |
kwargs['rel'] = ManyToManyRel(to, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
747 |
related_name=kwargs.pop('related_name', None), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
748 |
limit_choices_to=kwargs.pop('limit_choices_to', None), |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
749 |
symmetrical=kwargs.pop('symmetrical', True), |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
750 |
through=kwargs.pop('through', None)) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
751 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
752 |
self.db_table = kwargs.pop('db_table', None) |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
753 |
if kwargs['rel'].through is not None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
754 |
self.creates_table = False |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
755 |
assert self.db_table is None, "Cannot specify a db_table if an intermediary model is used." |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
756 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
757 |
self.creates_table = True |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
758 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
759 |
Field.__init__(self, **kwargs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
760 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
761 |
msg = ugettext_lazy('Hold down "Control", or "Command" on a Mac, to select more than one.') |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
762 |
self.help_text = string_concat(self.help_text, ' ', msg) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
763 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
764 |
def get_choices_default(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
765 |
return Field.get_choices(self, include_blank=False) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
766 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
767 |
def _get_m2m_db_table(self, opts): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
768 |
"Function that can be curried to provide the m2m table name for this relation" |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
769 |
if self.rel.through is not None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
770 |
return self.rel.through_model._meta.db_table |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
771 |
elif self.db_table: |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
772 |
return self.db_table |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
773 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
774 |
return '%s_%s' % (opts.db_table, self.name) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
775 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
776 |
def _get_m2m_column_name(self, related): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
777 |
"Function that can be curried to provide the source column name for the m2m table" |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
778 |
try: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
779 |
return self._m2m_column_name_cache |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
780 |
except: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
781 |
if self.rel.through is not None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
782 |
for f in self.rel.through_model._meta.fields: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
783 |
if hasattr(f,'rel') and f.rel and f.rel.to == related.model: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
784 |
self._m2m_column_name_cache = f.column |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
785 |
break |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
786 |
# If this is an m2m relation to self, avoid the inevitable name clash |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
787 |
elif related.model == related.parent_model: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
788 |
self._m2m_column_name_cache = 'from_' + related.model._meta.object_name.lower() + '_id' |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
789 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
790 |
self._m2m_column_name_cache = related.model._meta.object_name.lower() + '_id' |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
791 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
792 |
# Return the newly cached value |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
793 |
return self._m2m_column_name_cache |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
794 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
795 |
def _get_m2m_reverse_name(self, related): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
796 |
"Function that can be curried to provide the related column name for the m2m table" |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
797 |
try: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
798 |
return self._m2m_reverse_name_cache |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
799 |
except: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
800 |
if self.rel.through is not None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
801 |
found = False |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
802 |
for f in self.rel.through_model._meta.fields: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
803 |
if hasattr(f,'rel') and f.rel and f.rel.to == related.parent_model: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
804 |
if related.model == related.parent_model: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
805 |
# If this is an m2m-intermediate to self, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
806 |
# the first foreign key you find will be |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
807 |
# the source column. Keep searching for |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
808 |
# the second foreign key. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
809 |
if found: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
810 |
self._m2m_reverse_name_cache = f.column |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
811 |
break |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
812 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
813 |
found = True |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
814 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
815 |
self._m2m_reverse_name_cache = f.column |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
816 |
break |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
817 |
# If this is an m2m relation to self, avoid the inevitable name clash |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
818 |
elif related.model == related.parent_model: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
819 |
self._m2m_reverse_name_cache = 'to_' + related.parent_model._meta.object_name.lower() + '_id' |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
820 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
821 |
self._m2m_reverse_name_cache = related.parent_model._meta.object_name.lower() + '_id' |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
822 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
823 |
# Return the newly cached value |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
824 |
return self._m2m_reverse_name_cache |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
825 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
826 |
def isValidIDList(self, field_data, all_data): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
827 |
"Validates that the value is a valid list of foreign keys" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
828 |
mod = self.rel.to |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
829 |
try: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
830 |
pks = map(int, field_data.split(',')) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
831 |
except ValueError: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
832 |
# the CommaSeparatedIntegerField validator will catch this error |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
833 |
return |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
834 |
objects = mod._default_manager.in_bulk(pks) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
835 |
if len(objects) != len(pks): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
836 |
badkeys = [k for k in pks if k not in objects] |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
837 |
raise exceptions.ValidationError( |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
838 |
ungettext("Please enter valid %(self)s IDs. The value %(value)r is invalid.", |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
839 |
"Please enter valid %(self)s IDs. The values %(value)r are invalid.", |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
840 |
len(badkeys)) % { |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
841 |
'self': self.verbose_name, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
842 |
'value': len(badkeys) == 1 and badkeys[0] or tuple(badkeys), |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
843 |
}) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
844 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
845 |
def value_to_string(self, obj): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
846 |
data = '' |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
847 |
if obj: |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
848 |
qs = getattr(obj, self.name).all() |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
849 |
data = [instance._get_pk_val() for instance in qs] |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
850 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
851 |
# In required many-to-many fields with only one available choice, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
852 |
# select that one available choice. |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
853 |
if not self.blank: |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
854 |
choices_list = self.get_choices_default() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
855 |
if len(choices_list) == 1: |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
856 |
data = [choices_list[0][0]] |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
857 |
return smart_unicode(data) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
858 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
859 |
def contribute_to_class(self, cls, name): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
860 |
# To support multiple relations to self, it's useful to have a non-None |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
861 |
# related name on symmetrical relations for internal reasons. The |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
862 |
# concept doesn't make a lot of sense externally ("you want me to |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
863 |
# specify *what* on my non-reversible relation?!"), so we set it up |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
864 |
# automatically. The funky name reduces the chance of an accidental |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
865 |
# clash. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
866 |
if self.rel.symmetrical and self.rel.to == "self" and self.rel.related_name is None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
867 |
self.rel.related_name = "%s_rel_+" % name |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
868 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
869 |
super(ManyToManyField, self).contribute_to_class(cls, name) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
870 |
# Add the descriptor for the m2m relation |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
871 |
setattr(cls, self.name, ReverseManyRelatedObjectsDescriptor(self)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
872 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
873 |
# Set up the accessor for the m2m table name for the relation |
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Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
874 |
self.m2m_db_table = curry(self._get_m2m_db_table, cls._meta) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
875 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
876 |
# Populate some necessary rel arguments so that cross-app relations |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
877 |
# work correctly. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
878 |
if isinstance(self.rel.through, basestring): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
879 |
def resolve_through_model(field, model, cls): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
880 |
field.rel.through_model = model |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
881 |
add_lazy_relation(cls, self, self.rel.through, resolve_through_model) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
882 |
elif self.rel.through: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
883 |
self.rel.through_model = self.rel.through |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
884 |
self.rel.through = self.rel.through._meta.object_name |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
885 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
886 |
if isinstance(self.rel.to, basestring): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
887 |
target = self.rel.to |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
888 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
889 |
target = self.rel.to._meta.db_table |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
890 |
cls._meta.duplicate_targets[self.column] = (target, "m2m") |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
891 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
892 |
def contribute_to_related_class(self, cls, related): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
893 |
# m2m relations to self do not have a ManyRelatedObjectsDescriptor, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
894 |
# as it would be redundant - unless the field is non-symmetrical. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
895 |
if related.model != related.parent_model or not self.rel.symmetrical: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
896 |
# Add the descriptor for the m2m relation |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
897 |
setattr(cls, related.get_accessor_name(), ManyRelatedObjectsDescriptor(related)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
898 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
899 |
# Set up the accessors for the column names on the m2m table |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
900 |
self.m2m_column_name = curry(self._get_m2m_column_name, related) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
901 |
self.m2m_reverse_name = curry(self._get_m2m_reverse_name, related) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
902 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
903 |
def set_attributes_from_rel(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
904 |
pass |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
905 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
906 |
def value_from_object(self, obj): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
907 |
"Returns the value of this field in the given model instance." |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
908 |
return getattr(obj, self.attname).all() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
909 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
910 |
def save_form_data(self, instance, data): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
911 |
setattr(instance, self.attname, data) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
912 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
913 |
def formfield(self, **kwargs): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
914 |
defaults = {'form_class': forms.ModelMultipleChoiceField, 'queryset': self.rel.to._default_manager.complex_filter(self.rel.limit_choices_to)} |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
915 |
defaults.update(kwargs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
916 |
# If initial is passed in, it's a list of related objects, but the |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
917 |
# MultipleChoiceField takes a list of IDs. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
918 |
if defaults.get('initial') is not None: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
919 |
defaults['initial'] = [i._get_pk_val() for i in defaults['initial']] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
920 |
return super(ManyToManyField, self).formfield(**defaults) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
921 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
922 |
def db_type(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
923 |
# A ManyToManyField is not represented by a single column, |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
924 |
# so return None. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
925 |
return None |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
926 |