* Fixed favorites deletion

* Fixed parenting when dealing with post deletion

app/models/favorite.rb

@@ -1,4 +1,9 @@
 class Favorite < ActiveRecord::Base
   belongs_to :post
   scope :for_user, lambda {|user_id| where("user_id % 100 = #{user_id.to_i % 100} and user_id = #{user_id.to_i}")}
+  
+  # this is necessary because there's no trigger for deleting favorites
+  def self.destroy_all(hash)
+    connection.execute("delete from favorites_#{hash[:user_id] % 100} where user_id = #{hash[:user_id]} and post_id = #{hash[:post_id]}")
+  end
 end