Create directory objects for parent directories that don't contain any files themselves

lib/remote_storage/riak.rb

@@ -72,11 +72,24 @@ module RemoteStorage
                              :directory_bin => [category]})
       object.store
 
+      create_parent_directory_objects(user, category)
       update_directory_object(user, category)
     rescue ::Riak::HTTPFailedRequest
       halt 422
     end
 
+    def create_parent_directory_objects(user, category)
+      parent_directories = category.split("/")
+      parent_directories.pop
+      while parent_directories.any?
+        directory = parent_directories.join("/")
+        unless directory_bucket.exist?("#{user}:#{directory}")
+          update_directory_object(user, directory)
+        end
+        parent_directories.pop
+      end
+    end
+
     def update_directory_object(user, category)
       if category.match /\//
         parent_directory = category[0..category.rindex("/")-1]