def validate_list_editable(self, cls, model):
     """
     Validate that list_editable is a sequence of editable fields from
     list_display without first element.
     """
     if hasattr(cls, 'list_editable') and cls.list_editable:
         check_isseq(cls, 'list_editable', cls.list_editable)
         for idx, field_name in enumerate(cls.list_editable):
             try:
                 field = model._meta.get_field_by_name(field_name)[0]
             except models.FieldDoesNotExist:
                 raise ImproperlyConfigured("'%s.list_editable[%d]' refers to a "
                     "field, '%s', not defined on %s.%s."
                     % (cls.__name__, idx, field_name, model._meta.app_label, model.__name__))
             if field_name not in cls.list_display:
                 raise ImproperlyConfigured("'%s.list_editable[%d]' refers to "
                     "'%s' which is not defined in 'list_display'."
                     % (cls.__name__, idx, field_name))
             if cls.list_display_links is not None:
                 if field_name in cls.list_display_links:
                     raise ImproperlyConfigured("'%s' cannot be in both '%s.list_editable'"
                         " and '%s.list_display_links'"
                         % (field_name, cls.__name__, cls.__name__))
                 if not cls.list_display_links and cls.list_display[0] in cls.list_editable:
                     raise ImproperlyConfigured("'%s.list_editable[%d]' refers to"
                         " the first field in list_display, '%s', which can't be"
                         " used unless list_display_links is set."
                         % (cls.__name__, idx, cls.list_display[0]))
             if not field.editable:
                 raise ImproperlyConfigured("'%s.list_editable[%d]' refers to a "
                     "field, '%s', which isn't editable through the admin."
                     % (cls.__name__, idx, field_name))
Beispiel #2
0
def validate_admin_registration(cls, model):
    """
    Validates a class specified as a model admin.

    Right now this means validating prepopulated_fields, as for
    multilingual models DM handles them by itself.
    """

    if not is_multilingual_model(model):
        return

    from django.contrib.admin.validation import check_isdict, check_isseq

    opts = model._meta

    # this is heavily based on django.contrib.admin.validation.
    if hasattr(cls, '_dm_prepopulated_fields'):
        check_isdict(cls, '_dm_prepopulated_fields', cls.prepopulated_fields)
        for field, val in cls._dm_prepopulated_fields.items():
            f = get_field(cls, model, opts, 'prepopulated_fields', field)
            if isinstance(f, (models.DateTimeField, models.ForeignKey,
                              models.ManyToManyField)):
                raise ImproperlyConfigured(
                    "'%s.prepopulated_fields['%s']' "
                    "is either a DateTimeField, ForeignKey or "
                    "ManyToManyField. This isn't allowed." %
                    (cls.__name__, field))
            check_isseq(cls, "prepopulated_fields['%s']" % field, val)
            for idx, f in enumerate(val):
                get_field(cls, model, opts,
                          "prepopulated_fields['%s'][%d]" % (f, idx), f)
Beispiel #3
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def validate_admin_registration(cls, model):
    """
    Validates a class specified as a model admin.

    Right now this means validating prepopulated_fields, as for
    multilingual models DM handles them by itself.
    """

    if not is_multilingual_model(model):
        return

    from django.contrib.admin.validation import check_isdict, check_isseq

    opts = model._meta

    # this is heavily based on django.contrib.admin.validation.
    if hasattr(cls, '_dm_prepopulated_fields'):
        check_isdict(cls, '_dm_prepopulated_fields', cls.prepopulated_fields)
        for field, val in cls._dm_prepopulated_fields.items():
            f = get_field(cls, model, opts, 'prepopulated_fields', field)
            if isinstance(f, (models.DateTimeField, models.ForeignKey,
                models.ManyToManyField)):
                raise ImproperlyConfigured("'%s.prepopulated_fields['%s']' "
                        "is either a DateTimeField, ForeignKey or "
                        "ManyToManyField. This isn't allowed."
                        % (cls.__name__, field))
            check_isseq(cls, "prepopulated_fields['%s']" % field, val)
            for idx, f in enumerate(val):
                get_field(cls, model,
                        opts, "prepopulated_fields['%s'][%d]"
                        % (f, idx), f)
 def validate_filter_horizontal(self, cls, model):
     " Validate that filter_horizontal is a sequence of field names. "
     if hasattr(cls, 'filter_horizontal'):
         check_isseq(cls, 'filter_horizontal', cls.filter_horizontal)
         for idx, field in enumerate(cls.filter_horizontal):
             f = get_field(cls, model, 'filter_horizontal', field)
             if not is_multi_relation(f):
                 raise ImproperlyConfigured("'%s.filter_horizontal[%d]' must be "
                     "a ManyToManyField." % (cls.__name__, idx))
 def validate_filter_horizontal(self, cls, model):
     " Validate that filter_horizontal is a sequence of field names. "
     if hasattr(cls, 'filter_horizontal'):
         check_isseq(cls, 'filter_horizontal', cls.filter_horizontal)
         for idx, field in enumerate(cls.filter_horizontal):
             f = get_field(cls, model, 'filter_horizontal', field)
             if not is_multi_relation(f):
                 raise ImproperlyConfigured(
                     "'%s.filter_horizontal[%d]' must be "
                     "a ManyToManyField." % (cls.__name__, idx))
 def validate_raw_id_fields(self, cls, model):
     " Validate that raw_id_fields only contains field names that are listed on the model. "
     if hasattr(cls, 'raw_id_fields'):
         check_isseq(cls, 'raw_id_fields', cls.raw_id_fields)
         for idx, field in enumerate(cls.raw_id_fields):
             f = get_field(cls, model, 'raw_id_fields', field)
             if not is_relation(f):
                 raise ImproperlyConfigured("'%s.raw_id_fields[%d]', '%s' must "
                         "be either a ForeignKey or ManyToManyField."
                         % (cls.__name__, idx, field))
 def validate_list_display_links(self, cls, model):
     " Validate that list_display_links either is None or a unique subset of list_display."
     if hasattr(cls, 'list_display_links'):
         if cls.list_display_links is None:
             return
         check_isseq(cls, 'list_display_links', cls.list_display_links)
         for idx, field in enumerate(cls.list_display_links):
             if field not in cls.list_display:
                 raise ImproperlyConfigured("'%s.list_display_links[%d]' "
                         "refers to '%s' which is not defined in 'list_display'."
                         % (cls.__name__, idx, field))
 def validate_raw_id_fields(self, cls, model):
     " Validate that raw_id_fields only contains field names that are listed on the model. "
     if hasattr(cls, 'raw_id_fields'):
         check_isseq(cls, 'raw_id_fields', cls.raw_id_fields)
         for idx, field in enumerate(cls.raw_id_fields):
             f = get_field(cls, model, 'raw_id_fields', field)
             if not is_relation(f):
                 raise ImproperlyConfigured(
                     "'%s.raw_id_fields[%d]', '%s' must "
                     "be either a ForeignKey or ManyToManyField." %
                     (cls.__name__, idx, field))
 def validate_list_display_links(self, cls, model):
     " Validate that list_display_links either is None or a unique subset of list_display."
     if hasattr(cls, 'list_display_links'):
         if cls.list_display_links is None:
             return
         check_isseq(cls, 'list_display_links', cls.list_display_links)
         for idx, field in enumerate(cls.list_display_links):
             if field not in cls.list_display:
                 raise ImproperlyConfigured(
                     "'%s.list_display_links[%d]' "
                     "refers to '%s' which is not defined in 'list_display'."
                     % (cls.__name__, idx, field))
 def validate_prepopulated_fields(self, cls, model):
     " Validate that prepopulated_fields if a dictionary  containing allowed field types. "
     # prepopulated_fields
     if hasattr(cls, 'prepopulated_fields'):
         check_isdict(cls, 'prepopulated_fields', cls.prepopulated_fields)
         for field, val in cls.prepopulated_fields.items():
             f = get_field(cls, model, 'prepopulated_fields', field)
             if isinstance(f, DateTimeField) or is_relation(f):
                 raise ImproperlyConfigured("'%s.prepopulated_fields['%s']' "
                         "is either a DateTimeField, ForeignKey or "
                         "ManyToManyField. This isn't allowed."
                         % (cls.__name__, field))
             check_isseq(cls, "prepopulated_fields['%s']" % field, val)
             for idx, f in enumerate(val):
                 get_field(cls, model, "prepopulated_fields['%s'][%d]" % (field, idx), f)
 def validate_inlines(self, cls, model):
     " Validate inline model admin classes. "
     from django.contrib.admin.options import BaseModelAdmin
     if hasattr(cls, 'inlines'):
         check_isseq(cls, 'inlines', cls.inlines)
         for idx, inline in enumerate(cls.inlines):
             if not issubclass(inline, BaseModelAdmin):
                 raise ImproperlyConfigured("'%s.inlines[%d]' does not inherit "
                         "from BaseModelAdmin." % (cls.__name__, idx))
             if not inline.model:
                 raise ImproperlyConfigured("'model' is a required attribute "
                         "of '%s.inlines[%d]'." % (cls.__name__, idx))
             if not issubclass(inline.model, models.Model):
                 raise ImproperlyConfigured("'%s.inlines[%d].model' does not "
                         "inherit from models.Model." % (cls.__name__, idx))
             inline.validate(inline.model)
             self.check_inline(inline, model)
 def validate_list_filter(self, cls, model):
     """
     Validate that list_filter is a sequence of one of three options:
         1: 'field' - a basic field filter, possibly w/ relationships (eg, 'field__rel')
         2: ('field', SomeFieldListFilter) - a field-based list filter class
         3: SomeListFilter - a non-field list filter class
     """
     from django.contrib.admin import ListFilter, FieldListFilter
     if hasattr(cls, 'list_filter'):
         check_isseq(cls, 'list_filter', cls.list_filter)
         for idx, item in enumerate(cls.list_filter):
             if callable(item) and not isinstance(item, models.Field):
                 # If item is option 3, it should be a ListFilter...
                 if not issubclass(item, ListFilter):
                     raise ImproperlyConfigured(
                         "'%s.list_filter[%d]' is '%s'"
                         " which is not a descendant of ListFilter." %
                         (cls.__name__, idx, item.__name__))
                 # ...  but not a FieldListFilter.
                 if issubclass(item, FieldListFilter):
                     raise ImproperlyConfigured(
                         "'%s.list_filter[%d]' is '%s'"
                         " which is of type FieldListFilter but is not"
                         " associated with a field name." %
                         (cls.__name__, idx, item.__name__))
             else:
                 if isinstance(item, (tuple, list)):
                     # item is option #2
                     field, list_filter_class = item
                     if not issubclass(list_filter_class, FieldListFilter):
                         raise ImproperlyConfigured(
                             "'%s.list_filter[%d][1]'"
                             " is '%s' which is not of type FieldListFilter."
                             % (cls.__name__, idx,
                                list_filter_class.__name__))
                 else:
                     # item is option #1
                     field = item
                 # Validate the field string
                 try:
                     get_fields_from_path(model, field)
                 except (NotRelationField, FieldDoesNotExist):
                     raise ImproperlyConfigured(
                         "'%s.list_filter[%d]' refers to '%s'"
                         " which does not refer to a Field." %
                         (cls.__name__, idx, field))
 def validate_prepopulated_fields(self, cls, model):
     " Validate that prepopulated_fields if a dictionary  containing allowed field types. "
     # prepopulated_fields
     if hasattr(cls, 'prepopulated_fields'):
         check_isdict(cls, 'prepopulated_fields', cls.prepopulated_fields)
         for field, val in cls.prepopulated_fields.items():
             f = get_field(cls, model, 'prepopulated_fields', field)
             if isinstance(f, DateTimeField) or is_relation(f):
                 raise ImproperlyConfigured(
                     "'%s.prepopulated_fields['%s']' "
                     "is either a DateTimeField, ForeignKey or "
                     "ManyToManyField. This isn't allowed." %
                     (cls.__name__, field))
             check_isseq(cls, "prepopulated_fields['%s']" % field, val)
             for idx, f in enumerate(val):
                 get_field(cls, model,
                           "prepopulated_fields['%s'][%d]" % (field, idx),
                           f)
 def validate_list_display(self, cls, model):
     " Validate that list_display only contains fields or usable attributes. "
     if hasattr(cls, 'list_display'):
         check_isseq(cls, 'list_display', cls.list_display)
         for idx, field in enumerate(cls.list_display):
             if not callable(field):
                 if not hasattr(cls, field):
                     if not hasattr(model, field):
                         try:
                             model._meta.get_field(field)
                         except models.FieldDoesNotExist:
                             raise ImproperlyConfigured("%s.list_display[%d], %r is not a callable or an attribute of %r or found in the model %r."
                                 % (cls.__name__, idx, field, cls.__name__, model._meta.object_name))
                     else:
                         # getattr(model, field) could be an X_RelatedObjectsDescriptor
                         f = fetch_attr(cls, model, "list_display[%d]" % idx, field)
                         if is_multi_relation(f):
                             raise ImproperlyConfigured("'%s.list_display[%d]', '%s' is a ManyToManyField which is not supported."
                                 % (cls.__name__, idx, field))
 def validate_inlines(self, cls, model):
     " Validate inline model admin classes. "
     from django.contrib.admin.options import BaseModelAdmin
     if hasattr(cls, 'inlines'):
         check_isseq(cls, 'inlines', cls.inlines)
         for idx, inline in enumerate(cls.inlines):
             if not issubclass(inline, BaseModelAdmin):
                 raise ImproperlyConfigured(
                     "'%s.inlines[%d]' does not inherit "
                     "from BaseModelAdmin." % (cls.__name__, idx))
             if not inline.model:
                 raise ImproperlyConfigured(
                     "'model' is a required attribute "
                     "of '%s.inlines[%d]'." % (cls.__name__, idx))
             if not issubclass(inline.model, models.Model):
                 raise ImproperlyConfigured(
                     "'%s.inlines[%d].model' does not "
                     "inherit from models.Model." % (cls.__name__, idx))
             inline.validate(inline.model)
             self.check_inline(inline, model)
 def validate_list_filter(self, cls, model):
     """
     Validate that list_filter is a sequence of one of three options:
         1: 'field' - a basic field filter, possibly w/ relationships (eg, 'field__rel')
         2: ('field', SomeFieldListFilter) - a field-based list filter class
         3: SomeListFilter - a non-field list filter class
     """
     from django.contrib.admin import ListFilter, FieldListFilter
     if hasattr(cls, 'list_filter'):
         check_isseq(cls, 'list_filter', cls.list_filter)
         for idx, item in enumerate(cls.list_filter):
             if callable(item) and not isinstance(item, models.Field):
                 # If item is option 3, it should be a ListFilter...
                 if not issubclass(item, ListFilter):
                     raise ImproperlyConfigured("'%s.list_filter[%d]' is '%s'"
                             " which is not a descendant of ListFilter."
                             % (cls.__name__, idx, item.__name__))
                 # ...  but not a FieldListFilter.
                 if issubclass(item, FieldListFilter):
                     raise ImproperlyConfigured("'%s.list_filter[%d]' is '%s'"
                             " which is of type FieldListFilter but is not"
                             " associated with a field name."
                             % (cls.__name__, idx, item.__name__))
             else:
                 if isinstance(item, (tuple, list)):
                     # item is option #2
                     field, list_filter_class = item
                     if not issubclass(list_filter_class, FieldListFilter):
                         raise ImproperlyConfigured("'%s.list_filter[%d][1]'"
                             " is '%s' which is not of type FieldListFilter."
                             % (cls.__name__, idx, list_filter_class.__name__))
                 else:
                     # item is option #1
                     field = item
                 # Validate the field string
                 try:
                     get_fields_from_path(model, field)
                 except (NotRelationField, FieldDoesNotExist):
                     raise ImproperlyConfigured("'%s.list_filter[%d]' refers to '%s'"
                             " which does not refer to a Field."
                             % (cls.__name__, idx, field))
 def validate_list_editable(self, cls, model):
     """
     Validate that list_editable is a sequence of editable fields from
     list_display without first element.
     """
     if hasattr(cls, 'list_editable') and cls.list_editable:
         check_isseq(cls, 'list_editable', cls.list_editable)
         for idx, field_name in enumerate(cls.list_editable):
             try:
                 field = model._meta.get_field_by_name(field_name)[0]
             except models.FieldDoesNotExist:
                 raise ImproperlyConfigured(
                     "'%s.list_editable[%d]' refers to a "
                     "field, '%s', not defined on %s.%s." %
                     (cls.__name__, idx, field_name, model._meta.app_label,
                      model.__name__))
             if field_name not in cls.list_display:
                 raise ImproperlyConfigured(
                     "'%s.list_editable[%d]' refers to "
                     "'%s' which is not defined in 'list_display'." %
                     (cls.__name__, idx, field_name))
             if cls.list_display_links is not None:
                 if field_name in cls.list_display_links:
                     raise ImproperlyConfigured(
                         "'%s' cannot be in both '%s.list_editable'"
                         " and '%s.list_display_links'" %
                         (field_name, cls.__name__, cls.__name__))
                 if not cls.list_display_links and cls.list_display[
                         0] in cls.list_editable:
                     raise ImproperlyConfigured(
                         "'%s.list_editable[%d]' refers to"
                         " the first field in list_display, '%s', which can't be"
                         " used unless list_display_links is set." %
                         (cls.__name__, idx, cls.list_display[0]))
             if not field.editable:
                 raise ImproperlyConfigured(
                     "'%s.list_editable[%d]' refers to a "
                     "field, '%s', which isn't editable through the admin."
                     % (cls.__name__, idx, field_name))
 def validate_list_display(self, cls, model):
     " Validate that list_display only contains fields or usable attributes. "
     if hasattr(cls, 'list_display'):
         check_isseq(cls, 'list_display', cls.list_display)
         for idx, field in enumerate(cls.list_display):
             if not callable(field):
                 if not hasattr(cls, field):
                     if not hasattr(model, field):
                         try:
                             model._meta.get_field(field)
                         except models.FieldDoesNotExist:
                             raise ImproperlyConfigured(
                                 "%s.list_display[%d], %r is not a callable or an attribute of %r or found in the model %r."
                                 % (cls.__name__, idx, field, cls.__name__,
                                    model._meta.object_name))
                     else:
                         # getattr(model, field) could be an X_RelatedObjectsDescriptor
                         f = fetch_attr(cls, model,
                                        "list_display[%d]" % idx, field)
                         if is_multi_relation(f):
                             raise ImproperlyConfigured(
                                 "'%s.list_display[%d]', '%s' is a ManyToManyField which is not supported."
                                 % (cls.__name__, idx, field))
Beispiel #19
0
def validate_base(cls, model):
    opts = model._meta

    # fields
    if cls.fields: # default value is None
        check_isseq(cls, 'fields', cls.fields)
        validate_fields_spec(cls, model, opts, cls.fields, 'fields')
        if cls.fieldsets:
            raise ImproperlyConfigured('Both fieldsets and fields are specified in %s.' % cls.__name__)
        if len(cls.fields) > len(set(cls.fields)):
            raise ImproperlyConfigured('There are duplicate field(s) in %s.fields' % cls.__name__)

    # fieldsets
    if cls.fieldsets: # default value is None
        check_isseq(cls, 'fieldsets', cls.fieldsets)
        for idx, fieldset in enumerate(cls.fieldsets):
            check_isseq(cls, 'fieldsets[%d]' % idx, fieldset)
            if len(fieldset) != 2:
                raise ImproperlyConfigured("'%s.fieldsets[%d]' does not "
                        "have exactly two elements." % (cls.__name__, idx))
            check_isdict(cls, 'fieldsets[%d][1]' % idx, fieldset[1])
            if 'fields' not in fieldset[1]:
                raise ImproperlyConfigured("'fields' key is required in "
                        "%s.fieldsets[%d][1] field options dict."
                        % (cls.__name__, idx))
            validate_fields_spec(cls, model, opts, fieldset[1]['fields'], "fieldsets[%d][1]['fields']" % idx)
        flattened_fieldsets = flatten_fieldsets(cls.fieldsets)
        if len(flattened_fieldsets) > len(set(flattened_fieldsets)):
            raise ImproperlyConfigured('There are duplicate field(s) in %s.fieldsets' % cls.__name__)

    # exclude
    if cls.exclude: # default value is None
        check_isseq(cls, 'exclude', cls.exclude)
        for field in cls.exclude:
            #~ check_formfield(cls, model, opts, 'exclude', field)
            try:
                f = opts.get_field(field)
            except models.FieldDoesNotExist:
                # If we can't find a field on the model that matches,
                # it could be an extra field on the form.
                continue
        if len(cls.exclude) > len(set(cls.exclude)):
            raise ImproperlyConfigured('There are duplicate field(s) in %s.exclude' % cls.__name__)
Beispiel #20
0
def validate(cls, model):
    """
    Does basic ModelAdmin option validation. Calls custom validation
    classmethod in the end if it is provided in cls. The signature of the
    custom validation classmethod should be: def validate(cls, model).
    """
    # Before we can introspect models, they need to be fully loaded so that
    # inter-relations are set up correctly. We force that here.
    models.get_apps()

    opts = model._meta
    validate_base(cls, model)

    # list_display
    if hasattr(cls, 'list_display'):
        check_isseq(cls, 'list_display', cls.list_display)
        for idx, field in enumerate(cls.list_display):
            if not callable(field):
                if not hasattr(cls, field):
                    if not hasattr(model, field):
                        try:
                            opts.get_field(field)
                        except models.FieldDoesNotExist:
                            raise ImproperlyConfigured("%s.list_display[%d], %r is not a callable or an attribute of %r or found in the model %r."
                                % (cls.__name__, idx, field, cls.__name__, model._meta.object_name))
                    else:
                        # getattr(model, field) could be an X_RelatedObjectsDescriptor
                        f = fetch_attr(cls, model, opts, "list_display[%d]" % idx, field)
                        if isinstance(f, models.ManyToManyField):
                            raise ImproperlyConfigured("'%s.list_display[%d]', '%s' is a ManyToManyField which is not supported."
                                % (cls.__name__, idx, field))

    # search_fields = ()
    if hasattr(cls, 'search_fields'):
        check_isseq(cls, 'search_fields', cls.search_fields)

    # ordering = None
    if cls.ordering:
        check_isseq(cls, 'ordering', cls.ordering)
        for idx, field in enumerate(cls.ordering):
            if field == '?' and len(cls.ordering) != 1:
                raise ImproperlyConfigured("'%s.ordering' has the random "
                        "ordering marker '?', but contains other fields as "
                        "well. Please either remove '?' or the other fields."
                        % cls.__name__)
            if field == '?':
                continue
            if field.startswith('-'):
                field = field[1:]
            # Skip ordering in the format field1__field2 (FIXME: checking
            # this format would be nice, but it's a little fiddly).
            if '__' in field:
                continue
            get_field(cls, model, opts, 'ordering[%d]' % idx, field)

    #~ if hasattr(cls, "readonly_fields"):
        #~ check_readonly_fields(cls, model, opts)

    # list_select_related = False
    # save_as = False
    # save_on_top = False
    for attr in ('list_select_related', 'save_as', 'save_on_top'):
        if not isinstance(getattr(cls, attr), bool):
            raise ImproperlyConfigured("'%s.%s' should be a boolean."
                    % (cls.__name__, attr))

    # compositions = []
    if hasattr(cls, 'inlines'):
        check_isseq(cls, 'compositions', cls.compositions)
        for idx, compose in enumerate(cls.compositions):
            if not issubclass(compose, BaseModel):
                raise ImproperlyConfigured("'%s.compositions[%d]' does not inherit "
                        "from BaseModel." % (cls.__name__, idx))
            if not inline.model:
                raise ImproperlyConfigured("'model' is a required attribute "
                        "of '%s.compositions[%d]'." % (cls.__name__, idx))
            if not issubclass(compose.model, models.Model):
                raise ImproperlyConfigured("'%s.compositions[%d].model' does not "
                        "inherit from models.Model." % (cls.__name__, idx))
            validate_base(compose, compose.model)
            validate_compose(compose, cls, model)
 def validate_search_fields(self, cls, model):
     " Validate search_fields is a sequence. "
     if hasattr(cls, 'search_fields'):
         check_isseq(cls, 'search_fields', cls.search_fields)
 def validate_search_fields(self, cls, model):
     " Validate search_fields is a sequence. "
     if hasattr(cls, 'search_fields'):
         check_isseq(cls, 'search_fields', cls.search_fields)
Beispiel #23
0
def validate_base(cls, model):
    opts = model._meta

    # raw_id_fields
    if hasattr(cls, 'raw_id_fields'):
        check_isseq(cls, 'raw_id_fields', cls.raw_id_fields)
        for idx, field in enumerate(cls.raw_id_fields):
            f = get_field(cls, model, opts, 'raw_id_fields', field)
            if not isinstance(f, (models.ForeignKey, models.ManyToManyField)):
                raise ImproperlyConfigured("'%s.raw_id_fields[%d]', '%s' must "
                        "be either a ForeignKey or ManyToManyField."
                        % (cls.__name__, idx, field))

    # fields
    if cls.fields: # default value is None
        check_isseq(cls, 'fields', cls.fields)
        for field in cls.fields:
            if field in cls.readonly_fields:
                # Stuff can be put in fields that isn't actually a model field
                # if it's in readonly_fields, readonly_fields will handle the
                # validation of such things.
                continue
            check_formfield(cls, model, opts, 'fields', field)
            try:
                f = opts.get_field(field)
            except models.FieldDoesNotExist:
                # If we can't find a field on the model that matches,
                # it could be an extra field on the form.
                continue
            if isinstance(f, models.ManyToManyField) and not f.rel.through._meta.auto_created:
                raise ImproperlyConfigured("'%s.fields' can't include the ManyToManyField "
                    "field '%s' because '%s' manually specifies "
                    "a 'through' model." % (cls.__name__, field, field))
        if cls.fieldsets:
            raise ImproperlyConfigured('Both fieldsets and fields are specified in %s.' % cls.__name__)
        if len(cls.fields) > len(set(cls.fields)):
            raise ImproperlyConfigured('There are duplicate field(s) in %s.fields' % cls.__name__)
    '''
    # fieldsets
    if cls.fieldsets: # default value is None
        check_isseq(cls, 'fieldsets', cls.fieldsets)
        for idx, fieldset in enumerate(cls.fieldsets):
            check_isseq(cls, 'fieldsets[%d]' % idx, fieldset)
            if len(fieldset) != 2:
                raise ImproperlyConfigured("'%s.fieldsets[%d]' does not "
                        "have exactly two elements." % (cls.__name__, idx))
            check_isdict(cls, 'fieldsets[%d][1]' % idx, fieldset[1])
            if 'fields' not in fieldset[1]:
                raise ImproperlyConfigured("'fields' key is required in "
                        "%s.fieldsets[%d][1] field options dict."
                        % (cls.__name__, idx))
            for fields in fieldset[1]['fields']:
                # The entry in fields might be a tuple. If it is a standalone
                # field, make it into a tuple to make processing easier.
                if type(fields) != tuple:
                    fields = (fields,)
                for field in fields:
                    if field in cls.readonly_fields:
                        # Stuff can be put in fields that isn't actually a
                        # model field if it's in readonly_fields,
                        # readonly_fields will handle the validation of such
                        # things.
                        continue
                    check_formfield(cls, model, opts, "fieldsets[%d][1]['fields']" % idx, field)
                    try:
                        f = opts.get_field(field)
                        if isinstance(f, models.ManyToManyField) and not f.rel.through._meta.auto_created:
                            raise ImproperlyConfigured("'%s.fieldsets[%d][1]['fields']' "
                                "can't include the ManyToManyField field '%s' because "
                                "'%s' manually specifies a 'through' model." % (
                                    cls.__name__, idx, field, field))
                    except models.FieldDoesNotExist:
                        # If we can't find a field on the model that matches,
                        # it could be an extra field on the form.
                        pass
        flattened_fieldsets = flatten_fieldsets(cls.fieldsets)
        if len(flattened_fieldsets) > len(set(flattened_fieldsets)):
            raise ImproperlyConfigured('There are duplicate field(s) in %s.fieldsets' % cls.__name__)
    '''
    # exclude
    if cls.exclude: # default value is None
        check_isseq(cls, 'exclude', cls.exclude)
        for field in cls.exclude:
            check_formfield(cls, model, opts, 'exclude', field)
            try:
                f = opts.get_field(field)
            except models.FieldDoesNotExist:
                # If we can't find a field on the model that matches,
                # it could be an extra field on the form.
                continue
        if len(cls.exclude) > len(set(cls.exclude)):
            raise ImproperlyConfigured('There are duplicate field(s) in %s.exclude' % cls.__name__)

    # form
    if hasattr(cls, 'form') and not issubclass(cls.form, BaseModelForm):
        raise ImproperlyConfigured("%s.form does not inherit from "
                "BaseModelForm." % cls.__name__)

    # filter_vertical
    if hasattr(cls, 'filter_vertical'):
        check_isseq(cls, 'filter_vertical', cls.filter_vertical)
        for idx, field in enumerate(cls.filter_vertical):
            f = get_field(cls, model, opts, 'filter_vertical', field)
            if not isinstance(f, models.ManyToManyField):
                raise ImproperlyConfigured("'%s.filter_vertical[%d]' must be "
                    "a ManyToManyField." % (cls.__name__, idx))

    # filter_horizontal
    if hasattr(cls, 'filter_horizontal'):
        check_isseq(cls, 'filter_horizontal', cls.filter_horizontal)
        for idx, field in enumerate(cls.filter_horizontal):
            f = get_field(cls, model, opts, 'filter_horizontal', field)
            if not isinstance(f, models.ManyToManyField):
                raise ImproperlyConfigured("'%s.filter_horizontal[%d]' must be "
                    "a ManyToManyField." % (cls.__name__, idx))

    # radio_fields
    if hasattr(cls, 'radio_fields'):
        check_isdict(cls, 'radio_fields', cls.radio_fields)
        for field, val in cls.radio_fields.items():
            f = get_field(cls, model, opts, 'radio_fields', field)
            if not (isinstance(f, models.ForeignKey) or f.choices):
                raise ImproperlyConfigured("'%s.radio_fields['%s']' "
                        "is neither an instance of ForeignKey nor does "
                        "have choices set." % (cls.__name__, field))
            if not val in (HORIZONTAL, VERTICAL):
                raise ImproperlyConfigured("'%s.radio_fields['%s']' "
                        "is neither admin.HORIZONTAL nor admin.VERTICAL."
                        % (cls.__name__, field))

    # prepopulated_fields
    if hasattr(cls, 'prepopulated_fields'):
        check_isdict(cls, 'prepopulated_fields', cls.prepopulated_fields)
        for field, val in cls.prepopulated_fields.items():
            f = get_field(cls, model, opts, 'prepopulated_fields', field)
            if isinstance(f, (models.DateTimeField, models.ForeignKey,
                models.ManyToManyField)):
                raise ImproperlyConfigured("'%s.prepopulated_fields['%s']' "
                        "is either a DateTimeField, ForeignKey or "
                        "ManyToManyField. This isn't allowed."
                        % (cls.__name__, field))
            check_isseq(cls, "prepopulated_fields['%s']" % field, val)
            for idx, f in enumerate(val):
                get_field(cls, model, opts, "prepopulated_fields['%s'][%d]" % (field, idx), f)