_django_db_models_base.py 文件源码

def getCustomProperties(self):
        self.fields = {}
        self.relations = {}
        self.columns = []

        self.meta = self.klass._meta

        for name in self.meta.get_all_field_names():
            x = self.meta.get_field_by_name(name)[0]

            if isinstance(x, files.FileField):
                self.readonly_attrs.update([name])

            if isinstance(x, ForeignObjectRel):
                continue

            if isinstance(x, models.ManyToManyField):
                self.relations[name] = x
            elif not isinstance(x, models.ForeignKey):
                self.fields[name] = x
            else:
                self.relations[name] = x

        parent_fields = []

        for field in self.meta.parents.values():
            parent_fields.append(field.attname)
            del self.relations[field.name]

        self.exclude_attrs.update(parent_fields)

        props = self.fields.keys()

        self.encodable_properties.update(props)
        self.decodable_properties.update(props)

        self.exclude_attrs.update(['_state'])