add uniqueness check for stories, closes stringer-rss#8

Matt Swanson · Matt Swanson · commit 53b32354eb9e · 2013-05-08T19:00:48.000-04:00
diff --git a/app/models/story.rb b/app/models/story.rb
@@ -3,6 +3,8 @@
 class Story < ActiveRecord::Base
   belongs_to :feed
 
+  validates_uniqueness_of :permalink
+
   UNTITLED = "[untitled]"
 
   def headline
