@property
    def json(self):
        if self._data_json:
            return self._data_json

        if not self.data or self.content_type != 'application/json':
            return None

        self._data_json = json.loads(self.data)
        return self._data_json
Testing F() expressions on GeometryFields.
dataset/ETHPy150Open bslatkin/dpxdt/dpxdt/client/fetch_worker.py/FetchItem.json--crossover with--dataset/ETHPy150Open django/django/tests/gis_tests/relatedapp/tests.py/RelatedGeoModelTest.test06_f_expressions