33     def get_field_dict(cls):  argument
34         if cls.field_dict is None:
35             cls.field_dict = {}
36             for field in cls._meta.fields:
37                 cls.field_dict[field.name] = field
38         return cls.field_dict
42     def clean_foreign_keys(cls, data):  argument
49         for field in cls._meta.fields:
64     def _convert_booleans(cls, data):  argument
70         for field in cls._meta.fields:
77     def provide_default_values(cls, data):  argument
87         field_dict = cls.get_field_dict()
100     def validate_field_names(cls, data):  argument
103         field_dict = cls.get_field_dict()
111     def prepare_data_args(cls, data):  argument
115         errors = cls.validate_field_names(data)
122     def _get_required_field_names(cls):  argument
127         return [field.name for field in cls._meta.fields if not field.blank]
131     def get_basic_field_names(cls):  argument
143         return [field.name for field in cls._meta.fields
144                 if field.has_default()] + cls._get_required_field_names()
148     def validate_model_fields(cls, data):  argument
160         missing_fields = set(cls._get_required_field_names()) - set(data.keys())
163                     'supplied %s ' % (missing_fields, cls.__name__, data))
164         data = cls.prepare_data_args(data)
165         data = cls.provide_default_values(data)