Ticket 50: Added proposed fix for UUIDField to allow it to be fixed a…

…s primary_key

django_extensions/db/fields/__init__.py

@@ -211,6 +211,15 @@ def __init__(self, verbose_name=None, name=None, auto=True, version=1, node=None
     def get_internal_type(self):
         return CharField.__name__
 
+    def contribute_to_class(self, cls, name):
+        if self.primary_key: 
+            assert not cls._meta.has_auto_field, "A model can't have more than one AutoField: %s %s %s; have %s" % (self,cls,name,cls._meta.auto_field)
+            super(UUIDField, self).contribute_to_class(cls, name)
+            cls._meta.has_auto_field = True
+            cls._meta.auto_field = self
+        else:
+            super(UUIDField, self).contribute_to_class(cls, name)
+
     def create_uuid(self):
         if not self.version or self.version==4:
             return uuid.uuid4()
@@ -244,4 +253,4 @@ def south_field_triple(self):
         field_class = "django.db.models.fields.CharField"
         args, kwargs = introspector(self)
         # That's our definition!
-        return (field_class, args, kwargs)
+        return (field_class, args, kwargs)