related.py 文件源码

def _check_referencing_to_swapped_model(self):
        if (self.remote_field.model not in self.opts.apps.get_models() and
                not isinstance(self.remote_field.model, six.string_types) and
                self.remote_field.model._meta.swapped):
            model = "%s.%s" % (
                self.remote_field.model._meta.app_label,
                self.remote_field.model._meta.object_name
            )
            return [
                checks.Error(
                    ("Field defines a relation with the model '%s', "
                     "which has been swapped out.") % model,
                    hint="Update the relation to point at 'settings.%s'." % self.remote_field.model._meta.swappable,
                    obj=self,
                    id='fields.E301',
                )
            ]
        return []