refactors in fields

tests/test_foreign_keys.py

@@ -67,6 +67,12 @@ def create_test_database():
     metadata.drop_all(engine)
 
 
+@pytest.mark.asyncio
+async def test_wrong_query_foreign_key_type():
+    with pytest.raises(RelationshipInstanceError):
+        Track(title="The Error", album="wrong_pk_type")
+
+
 @pytest.mark.asyncio
 async def test_model_crud():
     async with database: