Merge pull request #5 from smacker/master

get_subclass method - thanks smacker!

.gitignore

@@ -4,3 +4,4 @@ HGREV
 .coverage
 .tox/
 Django-*.egg
+*.pyc

README.rst

@@ -263,6 +263,11 @@ be returned as their actual type, you can pass subclass names to
     nearby_places = Place.objects.select_subclasses("restaurant")
     # restaurants will be Restaurant instances, bars will still be Place instances
 
+Also it provides syntax sugar for `get()` method::
+    
+    place = Place.objects.get_subclass(id=some_id)
+    # "place" will automatically be an instance of Place, Restaurant, or Bar
+
 If you don't explicitly call ``select_subclasses()``, an ``InheritanceManager``
 behaves identically to a normal ``Manager``; so it's safe to use as your
 default manager for the model.

model_utils/managers.py

@@ -43,6 +43,9 @@ class InheritanceManager(models.Manager):
     def select_subclasses(self, *subclasses):
         return self.get_query_set().select_subclasses(*subclasses)
 
+    def get_subclass(self, *args, **kwargs):
+        return self.get_query_set().select_subclasses().get(*args, **kwargs)
+
 
 class InheritanceCastMixin(object):
     def cast(self):

model_utils/tests/tests.py

@@ -353,6 +353,11 @@ if django.VERSION >= (1, 2):
                 set([self.child1,
                      InheritanceManagerTestParent(pk=self.child2.pk)]))
 
+        def test_get_subclass(self):
+            self.assertEquals(
+                self.get_manager().get_subclass(pk=self.child1.pk),
+                self.child1)
+
 
     class InheritanceManagerRelatedTests(InheritanceManagerTests):
         def setUp(self):