@skipIfDBFeature('interprets_empty_strings_as_nulls')
    def test_empty_string_fk(self):
        char_model_empty = PrimaryKeyCharModel.objects.create(string='')
        fk_model_empty = FkToChar.objects.create(out=char_model_empty)
        fk_model_empty = FkToChar.objects.select_related('out').get(id=fk_model_empty.pk)
        self.assertEqual(fk_model_empty.out, char_model_empty)
Update location information of nodes under `oldpath`.
dataset/ETHPy150Open django/django/tests/model_fields/test_foreignkey.py/ForeignKeyTests.test_empty_string_fk--crossover with--dataset/ETHPy150Open PyTables/PyTables/tables/file.py/File._update_node_locations