app/django/contrib/admin/validation.py
author Lennard de Rijk <ljvderijk@gmail.com>
Thu, 30 Jul 2009 10:53:03 +0200
changeset 2692 b57572c43b32
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Factored out the "No Record Available" message.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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from django.core.exceptions import ImproperlyConfigured
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from django.db import models
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from django.forms.models import BaseModelForm, BaseModelFormSet, fields_for_model
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from django.contrib.admin.options import flatten_fieldsets, BaseModelAdmin
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from django.contrib.admin.options import HORIZONTAL, VERTICAL
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__all__ = ['validate']
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def validate(cls, model):
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    """
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    Does basic ModelAdmin option validation. Calls custom validation
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    classmethod in the end if it is provided in cls. The signature of the
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    custom validation classmethod should be: def validate(cls, model).
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    """
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    # Before we can introspect models, they need to be fully loaded so that
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    # inter-relations are set up correctly. We force that here.
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    models.get_apps()
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    opts = model._meta
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    validate_base(cls, model)
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    # list_display
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    if hasattr(cls, 'list_display'):
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        check_isseq(cls, 'list_display', cls.list_display)
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        for idx, field in enumerate(cls.list_display):
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            if not callable(field):
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                if not hasattr(cls, field):
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                    if not hasattr(model, field):
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                        try:
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                            opts.get_field(field)
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                        except models.FieldDoesNotExist:
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                            raise ImproperlyConfigured("%s.list_display[%d], %r is not a callable or an attribute of %r or found in the model %r."
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                                % (cls.__name__, idx, field, cls.__name__, model._meta.object_name))
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                        f = fetch_attr(cls, model, opts, "list_display[%d]" % idx, field)
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                        if isinstance(f, models.ManyToManyField):
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                            raise ImproperlyConfigured("'%s.list_display[%d]', '%s' is a ManyToManyField which is not supported."
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                                % (cls.__name__, idx, field))
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    # list_display_links
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    if hasattr(cls, 'list_display_links'):
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        check_isseq(cls, 'list_display_links', cls.list_display_links)
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        for idx, field in enumerate(cls.list_display_links):
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            fetch_attr(cls, model, opts, 'list_display_links[%d]' % idx, field)
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            if field not in cls.list_display:
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                raise ImproperlyConfigured("'%s.list_display_links[%d]'"
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                        "refers to '%s' which is not defined in 'list_display'."
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                        % (cls.__name__, idx, field))
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    # list_filter
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    if hasattr(cls, 'list_filter'):
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        check_isseq(cls, 'list_filter', cls.list_filter)
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        for idx, field in enumerate(cls.list_filter):
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            get_field(cls, model, opts, 'list_filter[%d]' % idx, field)
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    # list_per_page = 100
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    if hasattr(cls, 'list_per_page') and not isinstance(cls.list_per_page, int):
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        raise ImproperlyConfigured("'%s.list_per_page' should be a integer."
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                % cls.__name__)
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    # search_fields = ()
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    if hasattr(cls, 'search_fields'):
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        check_isseq(cls, 'search_fields', cls.search_fields)
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    # date_hierarchy = None
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    if cls.date_hierarchy:
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        f = get_field(cls, model, opts, 'date_hierarchy', cls.date_hierarchy)
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        if not isinstance(f, (models.DateField, models.DateTimeField)):
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            raise ImproperlyConfigured("'%s.date_hierarchy is "
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                    "neither an instance of DateField nor DateTimeField."
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                    % cls.__name__)
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    # ordering = None
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    if cls.ordering:
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        check_isseq(cls, 'ordering', cls.ordering)
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        for idx, field in enumerate(cls.ordering):
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            if field == '?' and len(cls.ordering) != 1:
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                raise ImproperlyConfigured("'%s.ordering' has the random "
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                        "ordering marker '?', but contains other fields as "
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                        "well. Please either remove '?' or the other fields."
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                        % cls.__name__)
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            if field == '?':
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                continue
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            if field.startswith('-'):
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                field = field[1:]
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            # Skip ordering in the format field1__field2 (FIXME: checking
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            # this format would be nice, but it's a little fiddly).
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            if '__' in field:
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                continue
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            get_field(cls, model, opts, 'ordering[%d]' % idx, field)
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    # list_select_related = False
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    # save_as = False
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    # save_on_top = False
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    for attr in ('list_select_related', 'save_as', 'save_on_top'):
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        if not isinstance(getattr(cls, attr), bool):
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            raise ImproperlyConfigured("'%s.%s' should be a boolean."
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                    % (cls.__name__, attr))
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    # inlines = []
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    if hasattr(cls, 'inlines'):
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        check_isseq(cls, 'inlines', cls.inlines)
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        for idx, inline in enumerate(cls.inlines):
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            if not issubclass(inline, BaseModelAdmin):
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                raise ImproperlyConfigured("'%s.inlines[%d]' does not inherit "
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                        "from BaseModelAdmin." % (cls.__name__, idx))
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            if not inline.model:
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                raise ImproperlyConfigured("'model' is a required attribute "
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                        "of '%s.inlines[%d]'." % (cls.__name__, idx))
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            if not issubclass(inline.model, models.Model):
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                raise ImproperlyConfigured("'%s.inlines[%d].model' does not "
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                        "inherit from models.Model." % (cls.__name__, idx))
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   117
            validate_base(inline, inline.model)
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            validate_inline(inline)
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diff changeset
   119
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   120
def validate_inline(cls):
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    # model is already verified to exist and be a Model
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    if cls.fk_name: # default value is None
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   123
        f = get_field(cls, cls.model, cls.model._meta, 'fk_name', cls.fk_name)
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        if not isinstance(f, models.ForeignKey):
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            raise ImproperlyConfigured("'%s.fk_name is not an instance of "
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   126
                    "models.ForeignKey." % cls.__name__)
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   127
    # extra = 3
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   128
    # max_num = 0
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   129
    for attr in ('extra', 'max_num'):
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   130
        if not isinstance(getattr(cls, attr), int):
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            raise ImproperlyConfigured("'%s.%s' should be a integer."
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                    % (cls.__name__, attr))
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   133
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   134
    # formset
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   135
    if hasattr(cls, 'formset') and not issubclass(cls.formset, BaseModelFormSet):
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        raise ImproperlyConfigured("'%s.formset' does not inherit from "
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                "BaseModelFormSet." % cls.__name__)
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   138
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   139
def validate_base(cls, model):
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    opts = model._meta
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   141
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   142
    # raw_id_fields
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   143
    if hasattr(cls, 'raw_id_fields'):
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   144
        check_isseq(cls, 'raw_id_fields', cls.raw_id_fields)
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   145
        for idx, field in enumerate(cls.raw_id_fields):
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            f = get_field(cls, model, opts, 'raw_id_fields', field)
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   147
            if not isinstance(f, (models.ForeignKey, models.ManyToManyField)):
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                raise ImproperlyConfigured("'%s.raw_id_fields[%d]', '%s' must "
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   149
                        "be either a ForeignKey or ManyToManyField."
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                        % (cls.__name__, idx, field))
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   151
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    # fields
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    if cls.fields: # default value is None
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   154
        check_isseq(cls, 'fields', cls.fields)
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   155
        for field in cls.fields:
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   156
            check_formfield(cls, model, opts, 'fields', field)
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   157
        if cls.fieldsets:
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   158
            raise ImproperlyConfigured('Both fieldsets and fields are specified in %s.' % cls.__name__)
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   159
        if len(cls.fields) > len(set(cls.fields)):
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   160
            raise ImproperlyConfigured('There are duplicate field(s) in %s.fields' % cls.__name__)
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   161
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   162
    # fieldsets
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   163
    if cls.fieldsets: # default value is None
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   164
        check_isseq(cls, 'fieldsets', cls.fieldsets)
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   165
        for idx, fieldset in enumerate(cls.fieldsets):
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   166
            check_isseq(cls, 'fieldsets[%d]' % idx, fieldset)
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   167
            if len(fieldset) != 2:
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   168
                raise ImproperlyConfigured("'%s.fieldsets[%d]' does not "
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   169
                        "have exactly two elements." % (cls.__name__, idx))
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   170
            check_isdict(cls, 'fieldsets[%d][1]' % idx, fieldset[1])
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   171
            if 'fields' not in fieldset[1]:
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   172
                raise ImproperlyConfigured("'fields' key is required in "
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   173
                        "%s.fieldsets[%d][1] field options dict."
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   174
                        % (cls.__name__, idx))
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   175
        flattened_fieldsets = flatten_fieldsets(cls.fieldsets)
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   176
        if len(flattened_fieldsets) > len(set(flattened_fieldsets)):
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            raise ImproperlyConfigured('There are duplicate field(s) in %s.fieldsets' % cls.__name__)
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   178
        for field in flattened_fieldsets:
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   179
            check_formfield(cls, model, opts, "fieldsets[%d][1]['fields']" % idx, field)
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   180
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   181
    # form
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   182
    if hasattr(cls, 'form') and not issubclass(cls.form, BaseModelForm):
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   183
        raise ImproperlyConfigured("%s.form does not inherit from "
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   184
                "BaseModelForm." % cls.__name__)
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   185
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   186
    # filter_vertical
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   187
    if hasattr(cls, 'filter_vertical'):
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   188
        check_isseq(cls, 'filter_vertical', cls.filter_vertical)
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   189
        for idx, field in enumerate(cls.filter_vertical):
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diff changeset
   190
            f = get_field(cls, model, opts, 'filter_vertical', field)
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diff changeset
   191
            if not isinstance(f, models.ManyToManyField):
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diff changeset
   192
                raise ImproperlyConfigured("'%s.filter_vertical[%d]' must be "
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   193
                    "a ManyToManyField." % (cls.__name__, idx))
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parents:
diff changeset
   194
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   195
    # filter_horizontal
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   196
    if hasattr(cls, 'filter_horizontal'):
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diff changeset
   197
        check_isseq(cls, 'filter_horizontal', cls.filter_horizontal)
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diff changeset
   198
        for idx, field in enumerate(cls.filter_horizontal):
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diff changeset
   199
            f = get_field(cls, model, opts, 'filter_horizontal', field)
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diff changeset
   200
            if not isinstance(f, models.ManyToManyField):
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diff changeset
   201
                raise ImproperlyConfigured("'%s.filter_horizontal[%d]' must be "
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parents:
diff changeset
   202
                    "a ManyToManyField." % (cls.__name__, idx))
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diff changeset
   203
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   204
    # radio_fields
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   205
    if hasattr(cls, 'radio_fields'):
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diff changeset
   206
        check_isdict(cls, 'radio_fields', cls.radio_fields)
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   207
        for field, val in cls.radio_fields.items():
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   208
            f = get_field(cls, model, opts, 'radio_fields', field)
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diff changeset
   209
            if not (isinstance(f, models.ForeignKey) or f.choices):
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   210
                raise ImproperlyConfigured("'%s.radio_fields['%s']' "
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diff changeset
   211
                        "is neither an instance of ForeignKey nor does "
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   212
                        "have choices set." % (cls.__name__, field))
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diff changeset
   213
            if not val in (HORIZONTAL, VERTICAL):
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diff changeset
   214
                raise ImproperlyConfigured("'%s.radio_fields['%s']' "
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   215
                        "is neither admin.HORIZONTAL nor admin.VERTICAL."
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   216
                        % (cls.__name__, field))
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parents:
diff changeset
   217
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   218
    # prepopulated_fields
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   219
    if hasattr(cls, 'prepopulated_fields'):
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   220
        check_isdict(cls, 'prepopulated_fields', cls.prepopulated_fields)
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diff changeset
   221
        for field, val in cls.prepopulated_fields.items():
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   222
            f = get_field(cls, model, opts, 'prepopulated_fields', field)
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diff changeset
   223
            if isinstance(f, (models.DateTimeField, models.ForeignKey,
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diff changeset
   224
                models.ManyToManyField)):
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diff changeset
   225
                raise ImproperlyConfigured("'%s.prepopulated_fields['%s']' "
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diff changeset
   226
                        "is either a DateTimeField, ForeignKey or "
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diff changeset
   227
                        "ManyToManyField. This isn't allowed."
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   228
                        % (cls.__name__, field))
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diff changeset
   229
            check_isseq(cls, "prepopulated_fields['%s']" % field, val)
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   230
            for idx, f in enumerate(val):
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                get_field(cls, model, opts, "prepopulated_fields['%s'][%d]" % (field, idx), f)
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def check_isseq(cls, label, obj):
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    if not isinstance(obj, (list, tuple)):
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        raise ImproperlyConfigured("'%s.%s' must be a list or tuple." % (cls.__name__, label))
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parents:
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   237
def check_isdict(cls, label, obj):
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   238
    if not isinstance(obj, dict):
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        raise ImproperlyConfigured("'%s.%s' must be a dictionary." % (cls.__name__, label))
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def get_field(cls, model, opts, label, field):
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   242
    try:
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   243
        return opts.get_field(field)
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   244
    except models.FieldDoesNotExist:
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        raise ImproperlyConfigured("'%s.%s' refers to field '%s' that is missing from model '%s'."
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                % (cls.__name__, label, field, model.__name__))
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parents:
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   247
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   248
def check_formfield(cls, model, opts, label, field):
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    if getattr(cls.form, 'base_fields', None):
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   250
        try:
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   251
            cls.form.base_fields[field]
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   252
        except KeyError:
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   253
            raise ImproperlyConfigured("'%s.%s' refers to field '%s' that "
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   254
                "is missing from the form." % (cls.__name__, label, field))
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   255
    else:
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   256
        fields = fields_for_model(model)
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   257
        try:
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   258
            fields[field]
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   259
        except KeyError:
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   260
            raise ImproperlyConfigured("'%s.%s' refers to field '%s' that "
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parents:
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   261
                "is missing from the form." % (cls.__name__, label, field))
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parents:
diff changeset
   262
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parents:
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   263
def fetch_attr(cls, model, opts, label, field):
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   264
    try:
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   265
        return opts.get_field(field)
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parents:
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   266
    except models.FieldDoesNotExist:
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   267
        pass
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parents:
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   268
    try:
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parents:
diff changeset
   269
        return getattr(model, field)
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parents:
diff changeset
   270
    except AttributeError:
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   271
        raise ImproperlyConfigured("'%s.%s' refers to '%s' that is neither a field, method or property of model '%s'."
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parents:
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   272
            % (cls.__name__, label, field, model.__name__))