Fixed #11428 -- Ensured that SQL generating commands and dumpdata don't include proxy models in their output. Thanks to Anssi Kaariainen for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11343 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/management/commands/dumpdata.py

@@ -73,7 +73,8 @@ class Command(BaseCommand):
                 model_list = get_models(app)
 
             for model in model_list:
-                objects.extend(model._default_manager.all())
+                if not model._meta.proxy:
+                    objects.extend(model._default_manager.all())
 
         try:
             return serializers.serialize(format, objects, indent=indent)