def get_file_type(self, obj):
        return obj.type_name
If a pair of proxy models are linked by an FK from one concrete parent
dataset/ETHPy150Open ExCiteS/geokey/geokey/contributions/serializers.py/FileSerializer.get_file_type--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/tests/regressiontests/delete_regress/tests.py/ProxyDeleteTest.test_delete_proxy_pair