def _check_278(self, engine, data):
        compute_nodes = oslodbutils.get_table(engine, 'compute_nodes')
        self.assertEqual(0, len([fk for fk in compute_nodes.foreign_keys
                                 if fk.parent.name not in 'service_id']))
        self.assertTrue(compute_nodes.c.service_id.nullable)
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/tests/unit/db/test_migrations.py/NovaMigrationsCheckers._check_278/operator `==` -> `not in`