expose querysetproxy on reverse of foreignkey (virtual fk), add additional methods from queryset to querysetproxy

tests/test_models.py

@@ -9,7 +9,7 @@ import pytest
 import sqlalchemy
 
 import ormar
-from ormar.exceptions import QueryDefinitionError, NoMatch
+from ormar.exceptions import QueryDefinitionError, NoMatch, ModelError
 from tests.settings import DATABASE_URL
 
 database = databases.Database(DATABASE_URL, force_rollback=True)
@@ -117,6 +117,11 @@ def test_model_class():
     assert isinstance(User.Meta.table, sqlalchemy.Table)
 
 
+def test_wrong_field_name():
+    with pytest.raises(ModelError):
+        User(non_existing_pk=1)
+
+
 def test_model_pk():
     user = User(pk=1)
     assert user.pk == 1