DRF field compatibility

drf.py

"""
Utilities for working with ConfigurationModels.
"""
from __future__ import unicode_literals, absolute_import

from django.apps import apps
from django.contrib.auth.models import User
from rest_framework.parsers import JSONParser
from rest_framework.serializers import ModelSerializer

try:
    from rest_framework.serializers import ALL_FIELDS
except ImportError:
    ALL_FIELDS = None


def get_serializer_class(configuration_model):
    """ Returns a ConfigurationModel serializer class for the supplied configuration_model. """
    class AutoConfigModelSerializer(ModelSerializer):
        """Serializer class for configuration models."""

        class Meta(object):
            """Meta information for AutoConfigModelSerializer."""
            model = configuration_model
            if ALL_FIELDS:
                fields = ALL_FIELDS

        def create(self, validated_data):
            if "changed_by_username" in self.context:
                validated_data['changed_by'] = User.objects.get(username=self.context["changed_by_username"])
            return super(AutoConfigModelSerializer, self).create(validated_data)

    return AutoConfigModelSerializer