Fixed #4. Removed support for lookups using the (default) lookup, you must use…

Fixed #4.  Removed support for lookups using the  (default) lookup, you must use __in, since using exact only works under SQLite.

README.txt

@@ -22,7 +22,7 @@ Then you can use the API like so:
     [<Tag: red>, <Tag: green>, <Tag: delicious>]
     >>> apple.tags.remove("green")
     [<Tag: red>, <Tag: delicious>]
-    >>> Food.objects.filter(tags="red")
+    >>> Food.objects.filter(tags__in=["red"])
     [<Food: apple>, <Food: cherry>]
 
 

taggit/managers.py

@@ -48,8 +48,8 @@ class TaggableManager(object):
         getattr(instance, self.name).set(*value)
     
     def get_db_prep_lookup(self, lookup_type, value):
-        if lookup_type not in  ("in", "exact"):
-            raise ValueError("You can't do lookups other than \"in\" and \"exact\" on Tags")
+        if lookup_type !=  "in":
+            raise ValueError("You can't do lookups other than \"in\" on Tags")
         if lookup_type == "exact":
             value = [value]
         if all(isinstance(v, Tag) for v in value):

taggit/tests/tests.py

@@ -59,10 +59,8 @@ class LookupByTagTestCase(BaseTaggingTest):
         dog.tags.add("woof", "red")
         self.assertEqual(list(Food.objects.filter(tags__in=["red"]).distinct()), [apple])
 
-        self.assertEqual(list(Food.objects.filter(tags="red").distinct()), [apple])
-        
         tag = Tag.objects.get(name="woof")
-        self.assertEqual(list(Pet.objects.filter(tags=tag)), [dog])
+        self.assertEqual(list(Pet.objects.filter(tags__in=[tag])), [dog])
 
 
 class TaggableFormTestCase(BaseTaggingTest):