Ticket #5177: ctremove.diff

AUTHORS

@@ -289 +289 @@
     ymasuda@ethercube.com
     Jarek Zgoda <jarek.zgoda@gmail.com>
     Cheng Zhang
+    Rob Hudson <http://rob.cogit8.org/>
 
 A big THANK YOU goes to:
 

django/contrib/contenttypes/management.py

@@ -2 +2 @@
 Creates content types for all installed models.
 """
 
+from django.contrib.contenttypes.models import ContentType
 from django.dispatch import dispatcher
 from django.db.models import get_apps, get_models, signals
 from django.utils.encoding import smart_unicode
 
 def create_contenttypes(app, created_models, verbosity=2):
-    from django.contrib.contenttypes.models import ContentType
     ContentType.objects.clear_cache()
+    content_types = list(ContentType.objects.filter(app_label=app.__name__.split('.')[-2]))
     app_models = get_models(app)
     if not app_models:
         return
     for klass in app_models:
         opts = klass._meta
         try:
-            ContentType.objects.get(app_label=opts.app_label,
-                model=opts.object_name.lower())
+            ct = ContentType.objects.get(app_label=opts.app_label,
+                                         model=opts.object_name.lower())
+            content_types.remove(ct)
         except ContentType.DoesNotExist:
             ct = ContentType(name=smart_unicode(opts.verbose_name_raw),
                 app_label=opts.app_label, model=opts.object_name.lower())
             ct.save()
             if verbosity >= 2:
                 print "Adding content type '%s | %s'" % (ct.app_label, ct.model)
+    # any remaining content types don't have a matching model and are removed
+    for ct in content_types:
+        if verbosity >= 2:
+            print "Deleting stale content type '%s | %s'" % (ct.app_label, ct.model)
+        ct.delete()
 
 def create_all_contenttypes(verbosity=2):
     for app in get_apps():