acl: add AclBase.set_level(whom, None)

circle/acl/models.py

@@ -67,8 +67,8 @@ class AclBase(Model):
 
         :param whom: user or group the level is set for
         :type whom: User or Group
-        :param level: codename of level to set
-        :type level: Level or str or unicode
+        :param level: codename of level to set, or None
+        :type level: Level or str or unicode or NoneType
         """
         if isinstance(whom, User):
             self.set_user_level(whom, level)
@@ -83,17 +83,21 @@ class AclBase(Model):
 
         :param whom: user the level is set for
         :type whom: User
-        :param level: codename of level to set
-        :type level: Level or str or unicode
+        :param level: codename of level to set, or None
+        :type level: Level or str or unicode or NoneType
         """
         logger.info('%s.set_user_level(%s, %s) called',
                     *[unicode(p) for p in [self, user, level]])
+        if level is None:
+            pk = None
+        else:
             if isinstance(level, basestring):
                 level = self.get_level_object(level)
             if not self.object_level_set.filter(level_id=level.pk).exists():
                 self.object_level_set.create(level=level)
+            pk = level.pk
         for i in self.object_level_set.all():
-            if i.level_id != level.pk:
+            if i.level_id != pk:
                 i.users.remove(user)
             else:
                 i.users.add(user)
@@ -110,13 +114,17 @@ class AclBase(Model):
         """
         logger.info('%s.set_group_level(%s, %s) called',
                     *[unicode(p) for p in [self, group, level]])
+        if level is None:
+            pk = None
+        else:
             if isinstance(level, basestring):
                 level = self.get_level_object(level)
             #self.object_level_set.get_or_create(level=level, content_object=self)
             if not self.object_level_set.filter(level_id=level.pk).exists():
                 self.object_level_set.create(level=level)
+            pk = level.pk
         for i in self.object_level_set.all():
-            if i.level_id != level.pk:
+            if i.level_id != pk:
                 i.groups.remove(group)
             else:
                 i.groups.add(group)

circle/acl/tests/test_acl.py

@@ -133,3 +133,17 @@ class AclUserTest(TestCase):
         i1 = TestModel.objects.create(normal_field='Hello')
         i1.set_level(self.g1, 'bravo')
         unicode(ObjectLevel.objects.all()[0])
+
+    def test_set_user_level_none(self):
+        i = TestModel.objects.create(normal_field='Hello')
+        i.set_level(self.u1, 'alfa')
+        self.assertTrue(i.has_level(self.u1, 'alfa'))
+        i.set_level(self.u1, None)
+        self.assertFalse(i.has_level(self.u1, 'alfa'))
+
+    def test_set_group_level_none(self):
+        i = TestModel.objects.create(normal_field='Hello')
+        i.set_level(self.g1, 'alfa')
+        self.assertTrue(i.has_level(self.u1, 'alfa'))
+        i.set_level(self.g1, None)
+        self.assertFalse(i.has_level(self.u1, 'alfa'))