More changes brought through testing.

test_app/models.py

@@ -0,0 +1,18 @@
+from sqlalchemy import Column, String, Integer, ForeignKey
+from sqlalchemy.orm import relationship
+from crudkit.core.base import CRUDMixin
+from test_app.db import Base
+
+class User(CRUDMixin, Base):
+    __tablename__ = 'users'
+    name = Column(String)
+    email = Column(String)
+    supervisor_id = Column(Integer, ForeignKey('users.id'))
+    supervisor = relationship('User', remote_side='User.id')
+
+class Device(CRUDMixin, Base):
+    __tablename__ = 'devices'
+    name = Column(String)
+    serial = Column(String)
+    assigned_to_id = Column(Integer, ForeignKey('users.id'))
+    assigned_to = relationship('User')