req and fix FK models

circle/acl/tests/test_acl.py

@@ -20,7 +20,7 @@ from django.contrib.auth.models import User, Group, AnonymousUser
 from django.db.models import TextField, ForeignKey
 
 from ..models import ObjectLevel, AclBase
-
+from django.db import models
 
 class TestModel(AclBase):
     normal_field = TextField()
@@ -34,7 +34,7 @@ class TestModel(AclBase):
 
 class Test2Model(AclBase):
     normal2_field = TextField()
-    owner = ForeignKey(User, null=True)
+    owner = ForeignKey(User, null=True, on_delete=models.CASCADE)
 
     ACL_LEVELS = (
         ('one', 'One'),