fix issue craigds#65

Reverse the MRO list so that we really get the base typed model,
and not the closest subclass.

typedmodels/models.py

@@ -395,7 +395,7 @@ def __init__(self, *args, _typedmodels_do_recast=None, **kwargs):
             self.recast()
 
     def recast(self, typ=None):
-        for base in self.__class__.mro():
+        for base in reversed(self.__class__.mro()):
             if issubclass(base, TypedModel) and hasattr(base, "_typedmodels_registry"):
                 break
         else:

typedmodels/tests.py

@@ -188,20 +188,34 @@ def test_recast_auto(animals):
     assert type(cat) == BigCat
 
 
-def test_recast_string(animals):
+def test_recast_to_subclass_string(animals):
     cat = Feline.objects.get(name="kitteh")
     cat.recast("testapp.bigcat")
     assert cat.type == "testapp.bigcat"
     assert type(cat) == BigCat
 
 
-def test_recast_modelclass(animals):
+def test_recast_to_subclass_modelclass(animals):
     cat = Feline.objects.get(name="kitteh")
     cat.recast(BigCat)
     assert cat.type == "testapp.bigcat"
     assert type(cat) == BigCat
 
 
+def test_recast_string(animals):
+    cat = Feline.objects.get(name="kitteh")
+    cat.recast("testapp.canine")
+    assert cat.type == "testapp.canine"
+    assert type(cat) == Canine
+
+
+def test_recast_modelclass(animals):
+    cat = Feline.objects.get(name="kitteh")
+    cat.recast(Canine)
+    assert cat.type == "testapp.canine"
+    assert type(cat) == Canine
+
+
 def test_recast_fail(animals):
     cat = Feline.objects.get(name="kitteh")
     with pytest.raises(ValueError):