author | Lennard de Rijk <ljvderijk@gmail.com> |
Thu, 12 Feb 2009 23:12:09 +0000 | |
changeset 1289 | 86a4e0e75ea6 |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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import copy |
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import types |
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import sys |
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import os |
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from itertools import izip |
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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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|
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import django.db.models.manager # Imported to register signal handler. |
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from django.core.exceptions import ObjectDoesNotExist, MultipleObjectsReturned, FieldError |
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from django.db.models.fields import AutoField |
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from django.db.models.fields.related import OneToOneRel, ManyToOneRel, OneToOneField |
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from django.db.models.query import delete_objects, Q, CollectedObjects |
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from django.db.models.options import Options |
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from django.db import connection, transaction, DatabaseError |
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from django.db.models import signals |
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from django.db.models.loading import register_models, get_model |
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from django.utils.functional import curry |
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from django.utils.encoding import smart_str, force_unicode, smart_unicode |
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from django.conf import settings |
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|
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class ModelBase(type): |
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""" |
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Metaclass for all models. |
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""" |
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def __new__(cls, name, bases, attrs): |
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super_new = super(ModelBase, cls).__new__ |
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parents = [b for b in bases if isinstance(b, ModelBase)] |
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if not parents: |
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# If this isn't a subclass of Model, don't do anything special. |
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return super_new(cls, name, bases, attrs) |
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# Create the class. |
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module = attrs.pop('__module__') |
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new_class = super_new(cls, name, bases, {'__module__': module}) |
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attr_meta = attrs.pop('Meta', None) |
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abstract = getattr(attr_meta, 'abstract', False) |
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if not attr_meta: |
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meta = getattr(new_class, 'Meta', None) |
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else: |
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meta = attr_meta |
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base_meta = getattr(new_class, '_meta', None) |
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if getattr(meta, 'app_label', None) is None: |
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# Figure out the app_label by looking one level up. |
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# For 'django.contrib.sites.models', this would be 'sites'. |
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model_module = sys.modules[new_class.__module__] |
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kwargs = {"app_label": model_module.__name__.split('.')[-2]} |
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else: |
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kwargs = {} |
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new_class.add_to_class('_meta', Options(meta, **kwargs)) |
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if not abstract: |
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new_class.add_to_class('DoesNotExist', |
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subclass_exception('DoesNotExist', ObjectDoesNotExist, module)) |
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new_class.add_to_class('MultipleObjectsReturned', |
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subclass_exception('MultipleObjectsReturned', MultipleObjectsReturned, module)) |
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if base_meta and not base_meta.abstract: |
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# Non-abstract child classes inherit some attributes from their |
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# non-abstract parent (unless an ABC comes before it in the |
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# method resolution order). |
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if not hasattr(meta, 'ordering'): |
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new_class._meta.ordering = base_meta.ordering |
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if not hasattr(meta, 'get_latest_by'): |
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new_class._meta.get_latest_by = base_meta.get_latest_by |
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if getattr(new_class, '_default_manager', None): |
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new_class._default_manager = None |
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# Bail out early if we have already created this class. |
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m = get_model(new_class._meta.app_label, name, False) |
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if m is not None: |
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return m |
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# Add all attributes to the class. |
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for obj_name, obj in attrs.items(): |
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new_class.add_to_class(obj_name, obj) |
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# Do the appropriate setup for any model parents. |
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o2o_map = dict([(f.rel.to, f) for f in new_class._meta.local_fields |
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if isinstance(f, OneToOneField)]) |
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85 |
for base in parents: |
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if not hasattr(base, '_meta'): |
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# Things without _meta aren't functional models, so they're |
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# uninteresting parents. |
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continue |
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90 |
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# All the fields of any type declared on this model |
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new_fields = new_class._meta.local_fields + \ |
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new_class._meta.local_many_to_many + \ |
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new_class._meta.virtual_fields |
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field_names = set([f.name for f in new_fields]) |
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96 |
|
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if not base._meta.abstract: |
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# Concrete classes... |
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if base in o2o_map: |
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field = o2o_map[base] |
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field.primary_key = True |
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new_class._meta.setup_pk(field) |
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103 |
else: |
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attr_name = '%s_ptr' % base._meta.module_name |
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field = OneToOneField(base, name=attr_name, |
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auto_created=True, parent_link=True) |
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new_class.add_to_class(attr_name, field) |
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new_class._meta.parents[base] = field |
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109 |
|
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110 |
else: |
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111 |
# .. and abstract ones. |
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112 |
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113 |
# Check for clashes between locally declared fields and those |
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114 |
# on the ABC. |
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115 |
parent_fields = base._meta.local_fields + base._meta.local_many_to_many |
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116 |
for field in parent_fields: |
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if field.name in field_names: |
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118 |
raise FieldError('Local field %r in class %r clashes '\ |
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119 |
'with field of similar name from '\ |
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120 |
'abstract base class %r' % \ |
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121 |
(field.name, name, base.__name__)) |
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122 |
new_class.add_to_class(field.name, copy.deepcopy(field)) |
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123 |
|
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124 |
# Pass any non-abstract parent classes onto child. |
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125 |
new_class._meta.parents.update(base._meta.parents) |
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126 |
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127 |
# Inherit managers from the abstract base classes. |
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128 |
base_managers = base._meta.abstract_managers |
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129 |
base_managers.sort() |
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130 |
for _, mgr_name, manager in base_managers: |
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val = getattr(new_class, mgr_name, None) |
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if not val or val is manager: |
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new_manager = manager._copy_to_model(new_class) |
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new_class.add_to_class(mgr_name, new_manager) |
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135 |
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136 |
# Inherit virtual fields (like GenericForeignKey) from the parent class |
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137 |
for field in base._meta.virtual_fields: |
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138 |
if base._meta.abstract and field.name in field_names: |
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139 |
raise FieldError('Local field %r in class %r clashes '\ |
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140 |
'with field of similar name from '\ |
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141 |
'abstract base class %r' % \ |
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142 |
(field.name, name, base.__name__)) |
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143 |
new_class.add_to_class(field.name, copy.deepcopy(field)) |
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144 |
|
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145 |
if abstract: |
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146 |
# Abstract base models can't be instantiated and don't appear in |
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147 |
# the list of models for an app. We do the final setup for them a |
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148 |
# little differently from normal models. |
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149 |
attr_meta.abstract = False |
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150 |
new_class.Meta = attr_meta |
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151 |
return new_class |
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152 |
|
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153 |
new_class._prepare() |
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154 |
register_models(new_class._meta.app_label, new_class) |
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155 |
|
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156 |
# Because of the way imports happen (recursively), we may or may not be |
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157 |
# the first time this model tries to register with the framework. There |
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158 |
# should only be one class for each model, so we always return the |
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159 |
# registered version. |
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160 |
return get_model(new_class._meta.app_label, name, False) |
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161 |
|
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162 |
def add_to_class(cls, name, value): |
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163 |
if hasattr(value, 'contribute_to_class'): |
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164 |
value.contribute_to_class(cls, name) |
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165 |
else: |
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setattr(cls, name, value) |
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167 |
|
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168 |
def _prepare(cls): |
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169 |
""" |
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170 |
Creates some methods once self._meta has been populated. |
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171 |
""" |
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172 |
opts = cls._meta |
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173 |
opts._prepare(cls) |
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174 |
|
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175 |
if opts.order_with_respect_to: |
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176 |
cls.get_next_in_order = curry(cls._get_next_or_previous_in_order, is_next=True) |
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177 |
cls.get_previous_in_order = curry(cls._get_next_or_previous_in_order, is_next=False) |
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178 |
setattr(opts.order_with_respect_to.rel.to, 'get_%s_order' % cls.__name__.lower(), curry(method_get_order, cls)) |
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179 |
setattr(opts.order_with_respect_to.rel.to, 'set_%s_order' % cls.__name__.lower(), curry(method_set_order, cls)) |
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180 |
|
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181 |
# Give the class a docstring -- its definition. |
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182 |
if cls.__doc__ is None: |
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183 |
cls.__doc__ = "%s(%s)" % (cls.__name__, ", ".join([f.attname for f in opts.fields])) |
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184 |
|
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185 |
if hasattr(cls, 'get_absolute_url'): |
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186 |
cls.get_absolute_url = curry(get_absolute_url, opts, cls.get_absolute_url) |
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187 |
|
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188 |
signals.class_prepared.send(sender=cls) |
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189 |
|
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190 |
|
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191 |
class Model(object): |
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192 |
__metaclass__ = ModelBase |
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193 |
|
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194 |
def __init__(self, *args, **kwargs): |
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195 |
signals.pre_init.send(sender=self.__class__, args=args, kwargs=kwargs) |
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196 |
|
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197 |
# There is a rather weird disparity here; if kwargs, it's set, then args |
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198 |
# overrides it. It should be one or the other; don't duplicate the work |
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199 |
# The reason for the kwargs check is that standard iterator passes in by |
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200 |
# args, and instantiation for iteration is 33% faster. |
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201 |
args_len = len(args) |
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202 |
if args_len > len(self._meta.fields): |
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203 |
# Daft, but matches old exception sans the err msg. |
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204 |
raise IndexError("Number of args exceeds number of fields") |
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205 |
|
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206 |
fields_iter = iter(self._meta.fields) |
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207 |
if not kwargs: |
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208 |
# The ordering of the izip calls matter - izip throws StopIteration |
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209 |
# when an iter throws it. So if the first iter throws it, the second |
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210 |
# is *not* consumed. We rely on this, so don't change the order |
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211 |
# without changing the logic. |
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212 |
for val, field in izip(args, fields_iter): |
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213 |
setattr(self, field.attname, val) |
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214 |
else: |
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215 |
# Slower, kwargs-ready version. |
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216 |
for val, field in izip(args, fields_iter): |
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217 |
setattr(self, field.attname, val) |
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kwargs.pop(field.name, None) |
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219 |
# Maintain compatibility with existing calls. |
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220 |
if isinstance(field.rel, ManyToOneRel): |
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221 |
kwargs.pop(field.attname, None) |
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222 |
|
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223 |
# Now we're left with the unprocessed fields that *must* come from |
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224 |
# keywords, or default. |
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225 |
|
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226 |
for field in fields_iter: |
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227 |
rel_obj = None |
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228 |
if kwargs: |
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229 |
if isinstance(field.rel, ManyToOneRel): |
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230 |
try: |
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231 |
# Assume object instance was passed in. |
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232 |
rel_obj = kwargs.pop(field.name) |
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233 |
except KeyError: |
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234 |
try: |
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# Object instance wasn't passed in -- must be an ID. |
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236 |
val = kwargs.pop(field.attname) |
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237 |
except KeyError: |
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238 |
val = field.get_default() |
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239 |
else: |
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240 |
# Object instance was passed in. Special case: You can |
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241 |
# pass in "None" for related objects if it's allowed. |
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242 |
if rel_obj is None and field.null: |
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243 |
val = None |
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244 |
else: |
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245 |
val = kwargs.pop(field.attname, field.get_default()) |
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246 |
else: |
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247 |
val = field.get_default() |
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248 |
# If we got passed a related instance, set it using the field.name |
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249 |
# instead of field.attname (e.g. "user" instead of "user_id") so |
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250 |
# that the object gets properly cached (and type checked) by the |
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251 |
# RelatedObjectDescriptor. |
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252 |
if rel_obj: |
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253 |
setattr(self, field.name, rel_obj) |
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254 |
else: |
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255 |
setattr(self, field.attname, val) |
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256 |
|
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257 |
if kwargs: |
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258 |
for prop in kwargs.keys(): |
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259 |
try: |
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if isinstance(getattr(self.__class__, prop), property): |
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setattr(self, prop, kwargs.pop(prop)) |
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262 |
except AttributeError: |
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263 |
pass |
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264 |
if kwargs: |
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raise TypeError, "'%s' is an invalid keyword argument for this function" % kwargs.keys()[0] |
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266 |
signals.post_init.send(sender=self.__class__, instance=self) |
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267 |
|
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268 |
def __repr__(self): |
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return smart_str(u'<%s: %s>' % (self.__class__.__name__, unicode(self))) |
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270 |
|
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271 |
def __str__(self): |
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if hasattr(self, '__unicode__'): |
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273 |
return force_unicode(self).encode('utf-8') |
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274 |
return '%s object' % self.__class__.__name__ |
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275 |
|
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276 |
def __eq__(self, other): |
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return isinstance(other, self.__class__) and self._get_pk_val() == other._get_pk_val() |
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278 |
|
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279 |
def __ne__(self, other): |
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280 |
return not self.__eq__(other) |
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281 |
|
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282 |
def __hash__(self): |
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|
283 |
return hash(self._get_pk_val()) |
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284 |
|
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285 |
def _get_pk_val(self, meta=None): |
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286 |
if not meta: |
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|
287 |
meta = self._meta |
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288 |
return getattr(self, meta.pk.attname) |
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289 |
|
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290 |
def _set_pk_val(self, value): |
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291 |
return setattr(self, self._meta.pk.attname, value) |
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292 |
|
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293 |
pk = property(_get_pk_val, _set_pk_val) |
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294 |
|
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|
295 |
def save(self, force_insert=False, force_update=False): |
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296 |
""" |
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|
297 |
Saves the current instance. Override this in a subclass if you want to |
54
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298 |
control the saving process. |
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|
299 |
|
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|
300 |
The 'force_insert' and 'force_update' parameters can be used to insist |
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|
301 |
that the "save" must be an SQL insert or update (or equivalent for |
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|
302 |
non-SQL backends), respectively. Normally, they should not be set. |
54
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|
303 |
""" |
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|
304 |
if force_insert and force_update: |
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|
305 |
raise ValueError("Cannot force both insert and updating in " |
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|
306 |
"model saving.") |
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|
307 |
self.save_base(force_insert=force_insert, force_update=force_update) |
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308 |
|
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309 |
save.alters_data = True |
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310 |
|
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311 |
def save_base(self, raw=False, cls=None, force_insert=False, |
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312 |
force_update=False): |
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313 |
""" |
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314 |
Does the heavy-lifting involved in saving. Subclasses shouldn't need to |
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|
315 |
override this method. It's separate from save() in order to hide the |
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|
316 |
need for overrides of save() to pass around internal-only parameters |
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|
317 |
('raw' and 'cls'). |
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|
318 |
""" |
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|
319 |
assert not (force_insert and force_update) |
54
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320 |
if not cls: |
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321 |
cls = self.__class__ |
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322 |
meta = self._meta |
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|
323 |
signal = True |
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|
324 |
signals.pre_save.send(sender=self.__class__, instance=self, raw=raw) |
54
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|
325 |
else: |
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|
326 |
meta = cls._meta |
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|
327 |
signal = False |
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328 |
|
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|
329 |
# If we are in a raw save, save the object exactly as presented. |
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parents:
54
diff
changeset
|
330 |
# That means that we don't try to be smart about saving attributes |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
331 |
# that might have come from the parent class - we just save the |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
332 |
# attributes we have been given to the class we have been given. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
333 |
if not raw: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
334 |
for parent, field in meta.parents.items(): |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
335 |
# At this point, parent's primary key field may be unknown |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
336 |
# (for example, from administration form which doesn't fill |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
337 |
# this field). If so, fill it. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
338 |
if getattr(self, parent._meta.pk.attname) is None and getattr(self, field.attname) is not None: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
339 |
setattr(self, parent._meta.pk.attname, getattr(self, field.attname)) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
340 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
341 |
self.save_base(raw, parent) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
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parents:
54
diff
changeset
|
342 |
setattr(self, field.attname, self._get_pk_val(parent._meta)) |
54
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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
|
343 |
|
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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
|
344 |
non_pks = [f for f in meta.local_fields if not f.primary_key] |
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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
|
345 |
|
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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
|
346 |
# First, try an UPDATE. If that doesn't update anything, do an INSERT. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
diff
changeset
|
347 |
pk_val = self._get_pk_val(meta) |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
348 |
pk_set = pk_val is not None |
54
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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
|
349 |
record_exists = True |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
350 |
manager = cls._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
|
351 |
if pk_set: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
352 |
# Determine whether a record with the primary key already exists. |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
353 |
if (force_update or (not force_insert and |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
354 |
manager.filter(pk=pk_val).extra(select={'a': 1}).values('a').order_by())): |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
355 |
# It does already exist, so do an UPDATE. |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
356 |
if force_update or non_pks: |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
357 |
values = [(f, None, f.get_db_prep_save(raw and getattr(self, f.attname) or f.pre_save(self, False))) for f in non_pks] |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
358 |
rows = manager.filter(pk=pk_val)._update(values) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
359 |
if force_update and not rows: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
360 |
raise DatabaseError("Forced update did not affect any rows.") |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
361 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
362 |
record_exists = False |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
363 |
if not pk_set or not record_exists: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
364 |
if not pk_set: |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
365 |
if force_update: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
366 |
raise ValueError("Cannot force an update in save() with no primary key.") |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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parents:
diff
changeset
|
367 |
values = [(f, f.get_db_prep_save(raw and getattr(self, f.attname) or f.pre_save(self, True))) for f in meta.local_fields if not isinstance(f, AutoField)] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
368 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
369 |
values = [(f, f.get_db_prep_save(raw and getattr(self, f.attname) or f.pre_save(self, True))) for f in meta.local_fields] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
370 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
371 |
if meta.order_with_respect_to: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
372 |
field = meta.order_with_respect_to |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
373 |
values.append((meta.get_field_by_name('_order')[0], manager.filter(**{field.name: getattr(self, field.attname)}).count())) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
374 |
record_exists = False |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
375 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
376 |
update_pk = bool(meta.has_auto_field and not pk_set) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
377 |
if values: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
378 |
# Create a new record. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
379 |
result = manager._insert(values, return_id=update_pk) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
380 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
381 |
# Create a new record with defaults for everything. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
382 |
result = manager._insert([(meta.pk, connection.ops.pk_default_value())], return_id=update_pk, raw_values=True) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
383 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
384 |
if update_pk: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
385 |
setattr(self, meta.pk.attname, result) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
386 |
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
|
387 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
388 |
if signal: |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
389 |
signals.post_save.send(sender=self.__class__, instance=self, |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
390 |
created=(not record_exists), raw=raw) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
391 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
392 |
save_base.alters_data = True |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
393 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
394 |
def _collect_sub_objects(self, seen_objs, parent=None, nullable=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
|
395 |
""" |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
396 |
Recursively populates seen_objs with all objects related to this |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
397 |
object. |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
398 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
399 |
When done, seen_objs.items() will be in the format: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
400 |
[(model_class, {pk_val: obj, pk_val: obj, ...}), |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
401 |
(model_class, {pk_val: obj, pk_val: 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
|
402 |
""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
403 |
pk_val = self._get_pk_val() |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
404 |
if seen_objs.add(self.__class__, pk_val, self, parent, nullable): |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
405 |
return |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
406 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
407 |
for related in self._meta.get_all_related_objects(): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
408 |
rel_opts_name = 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
|
409 |
if isinstance(related.field.rel, OneToOneRel): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
410 |
try: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
411 |
sub_obj = getattr(self, rel_opts_name) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
412 |
except ObjectDoesNotExist: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
413 |
pass |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
414 |
else: |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
415 |
sub_obj._collect_sub_objects(seen_objs, self.__class__, related.field.null) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
416 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
417 |
for sub_obj in getattr(self, rel_opts_name).all(): |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
418 |
sub_obj._collect_sub_objects(seen_objs, self.__class__, related.field.null) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
419 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
420 |
# Handle any ancestors (for the model-inheritance case). We do this by |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
421 |
# traversing to the most remote parent classes -- those with no parents |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
422 |
# themselves -- and then adding those instances to the collection. That |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
423 |
# will include all the child instances down to "self". |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
424 |
parent_stack = self._meta.parents.values() |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
425 |
while parent_stack: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
426 |
link = parent_stack.pop() |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
427 |
parent_obj = getattr(self, link.name) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
428 |
if parent_obj._meta.parents: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
429 |
parent_stack.extend(parent_obj._meta.parents.values()) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
430 |
continue |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
431 |
# At this point, parent_obj is base class (no ancestor models). So |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
432 |
# delete it and all its descendents. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
433 |
parent_obj._collect_sub_objects(seen_objs) |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
434 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
435 |
def delete(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
436 |
assert self._get_pk_val() is not None, "%s object can't be deleted because its %s attribute is set to None." % (self._meta.object_name, self._meta.pk.attname) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
437 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
438 |
# Find all the objects than need to be deleted. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
439 |
seen_objs = CollectedObjects() |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
440 |
self._collect_sub_objects(seen_objs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
441 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
442 |
# Actually delete the objects. |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
443 |
delete_objects(seen_objs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
444 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
445 |
delete.alters_data = True |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
446 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
447 |
def _get_FIELD_display(self, field): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
448 |
value = getattr(self, field.attname) |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
449 |
return force_unicode(dict(field.flatchoices).get(value, value), strings_only=True) |
54
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 |
def _get_next_or_previous_by_FIELD(self, field, is_next, **kwargs): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
452 |
op = is_next and 'gt' or 'lt' |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
453 |
order = not is_next and '-' or '' |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
454 |
param = smart_str(getattr(self, 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
|
455 |
q = Q(**{'%s__%s' % (field.name, op): param}) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
456 |
q = q|Q(**{field.name: param, 'pk__%s' % op: self.pk}) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
457 |
qs = self.__class__._default_manager.filter(**kwargs).filter(q).order_by('%s%s' % (order, field.name), '%spk' % order) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
458 |
try: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
459 |
return qs[0] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
460 |
except IndexError: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
461 |
raise self.DoesNotExist, "%s matching query does not exist." % self.__class__._meta.object_name |
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 |
def _get_next_or_previous_in_order(self, is_next): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
464 |
cachename = "__%s_order_cache" % is_next |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
465 |
if not hasattr(self, cachename): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
466 |
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
|
467 |
op = is_next and '>' or '<' |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
468 |
order = not is_next and '-_order' or '_order' |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
469 |
order_field = self._meta.order_with_respect_to |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
470 |
# FIXME: When querysets support nested queries, this can be turned |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
471 |
# into a pure queryset operation. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
472 |
where = ['%s %s (SELECT %s 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
|
473 |
(qn('_order'), op, qn('_order'), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
474 |
qn(self._meta.db_table), qn(self._meta.pk.column))] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
475 |
params = [self.pk] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
476 |
obj = self._default_manager.filter(**{order_field.name: getattr(self, order_field.attname)}).extra(where=where, params=params).order_by(order)[:1].get() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
477 |
setattr(self, cachename, obj) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
478 |
return getattr(self, cachename) |
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 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
481 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
482 |
############################################ |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
483 |
# HELPER FUNCTIONS (CURRIED MODEL METHODS) # |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
484 |
############################################ |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
485 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
486 |
# ORDERING METHODS ######################### |
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 |
def method_set_order(ordered_obj, self, id_list): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
489 |
rel_val = getattr(self, ordered_obj._meta.order_with_respect_to.rel.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
|
490 |
order_name = ordered_obj._meta.order_with_respect_to.name |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
491 |
# FIXME: It would be nice if there was an "update many" version of update |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
492 |
# for situations like this. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
493 |
for i, j in enumerate(id_list): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
494 |
ordered_obj.objects.filter(**{'pk': j, order_name: rel_val}).update(_order=i) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
495 |
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
|
496 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
497 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
498 |
def method_get_order(ordered_obj, self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
499 |
rel_val = getattr(self, ordered_obj._meta.order_with_respect_to.rel.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
|
500 |
order_name = ordered_obj._meta.order_with_respect_to.name |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
501 |
pk_name = ordered_obj._meta.pk.name |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
502 |
return [r[pk_name] for r in |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
503 |
ordered_obj.objects.filter(**{order_name: rel_val}).values(pk_name)] |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
504 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
505 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
506 |
############################################## |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
507 |
# HELPER FUNCTIONS (CURRIED MODEL FUNCTIONS) # |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
508 |
############################################## |
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 |
def get_absolute_url(opts, func, self, *args, **kwargs): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
511 |
return settings.ABSOLUTE_URL_OVERRIDES.get('%s.%s' % (opts.app_label, opts.module_name), func)(self, *args, **kwargs) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
512 |
|
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
54
diff
changeset
|
513 |
|
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
514 |
######## |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
515 |
# MISC # |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
516 |
######## |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
517 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
518 |
class Empty(object): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
519 |
pass |
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 |
if sys.version_info < (2, 5): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
522 |
# Prior to Python 2.5, Exception was an old-style class |
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 subclass_exception(name, parent, unused): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
524 |
return types.ClassType(name, (parent,), {}) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
525 |
else: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
526 |
def subclass_exception(name, parent, module): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
527 |
return type(name, (parent,), {'__module__': module}) |