def test_get_prep_value_can_return_none_if_null(self):
json_field_instance = JSONField(null=True)
value = {'a': 1}
prepared_value = json_field_instance.get_prep_value(value)
self.assertIsInstance(prepared_value, string_types)
self.assertDictEqual(value, json.loads(prepared_value))
already_json = json.dumps(value)
double_prepared_value = json_field_instance.get_prep_value(
already_json)
self.assertDictEqual(value,
json.loads(json.loads(double_prepared_value)))
self.assertIs(json_field_instance.get_prep_value(None), None)
def test_get_prep_value_always_json_dumps_if_not_null(self):
json_field_instance = JSONField(null=False)
value = {'a': 1}
prepared_value = json_field_instance.get_prep_value(value)
self.assertIsInstance(prepared_value, string_types)
self.assertDictEqual(value, json.loads(prepared_value))
already_json = json.dumps(value)
double_prepared_value = json_field_instance.get_prep_value(
already_json)
self.assertDictEqual(value,
json.loads(json.loads(double_prepared_value)))
self.assertEqual(json_field_instance.get_prep_value(None), 'null')
