Add an index on MediaEntries making sure slugs + uploader combos are unique

mediagoblin/db/models.py

@@ -95,7 +95,7 @@ class MediaEntry(Document):
         'thumbnail_file': [unicode]}
 
     required_fields = [
-        'uploader', 'created', 'media_type']
+        'uploader', 'created', 'media_type', 'slug']
 
     default_values = {
         'created': datetime.datetime.utcnow,
@@ -103,11 +103,10 @@ class MediaEntry(Document):
 
     migration_handler = migrations.MediaEntryMigration
 
-    # Actually we should referene uniqueness by uploader, but we
-    # should fix http://bugs.foocorp.net/issues/340 first.
-    # indexes = [
-    #     {'fields': ['uploader', 'slug'],
-    #      'unique': True}]
+    indexes = [
+        # Referene uniqueness of slugs by uploader
+        {'fields': ['uploader', 'slug'],
+         'unique': True}]
 
     def main_mediafile(self):
         pass