Merge pull request #213 from nicholasserra/nicholasserra-pluggable-manager

Allow pluggable manager for TaggableManager.

docs/api.txt

@@ -69,6 +69,16 @@ playing around with the API.
 
             >>> apple.tags.slugs()
             [u'green-and-juicy', u'red']
+    
+    .. hint::
+
+       You can subclass ``_TaggableManager`` (note the underscore) to add 
+       methods or functionality. ``TaggableManager`` takes an optional 
+       manager keyword argument for your custom class, like this::
+
+          class Food(models.Model):
+              # ... fields here
+              tags = TaggableManager(manager=_CustomTaggableManager)
 
 Filtering
 ~~~~~~~~~

tests/models.py

@@ -184,3 +184,11 @@ class Article(models.Model):
     title = models.CharField(max_length=100)
 
     tags = TaggableManager(through=ArticleTaggedItem)
+
+
+class CustomManager(models.Model):
+    class Foo(object):
+        def __init__(*args, **kwargs):
+            pass
+
+    tags = TaggableManager(manager=Foo)

tests/tests.py

@@ -13,14 +13,14 @@ from django.utils.encoding import force_text
 
 from django.contrib.contenttypes.models import ContentType
 
-from taggit.managers import TaggableManager, _model_name
+from taggit.managers import TaggableManager, _TaggableManager, _model_name
 from taggit.models import Tag, TaggedItem
 from .forms import (FoodForm, DirectFoodForm, CustomPKFoodForm,
     OfficialFoodForm)
 from .models import (Food, Pet, HousePet, DirectFood, DirectPet,
     DirectHousePet, TaggedPet, CustomPKFood, CustomPKPet, CustomPKHousePet,
     TaggedCustomPKPet, OfficialFood, OfficialPet, OfficialHousePet,
-    OfficialThroughModel, OfficialTag, Photo, Movie, Article)
+    OfficialThroughModel, OfficialTag, Photo, Movie, Article, CustomManager)
 from taggit.utils import parse_tags, edit_string_for_tags
 
 
@@ -355,7 +355,6 @@ class TaggableManagerTestCase(BaseTaggingTestCase):
                 'apple': set(['1', '2'])
             })
 
-
 class TaggableManagerDirectTestCase(TaggableManagerTestCase):
     food_model = DirectFood
     pet_model = DirectPet
@@ -391,6 +390,16 @@ class TaggableManagerOfficialTestCase(TaggableManagerTestCase):
 
         self.assertEqual(apple, self.food_model.objects.get(tags__official=False))
 
+class TaggableManagerInitializationTestCase(TaggableManagerTestCase):
+    """Make sure manager override defaults and sets correctly."""
+    food_model = Food
+    custom_manager_model = CustomManager
+
+    def test_default_manager(self):
+        self.assertEqual(self.food_model.tags.__class__, _TaggableManager)
+
+    def test_custom_manager(self):
+        self.assertEqual(self.custom_manager_model.tags.__class__, CustomManager.Foo)
 
 class TaggableFormTestCase(BaseTaggingTestCase):
     form_class = FoodForm