fixes #2446

app/models/post_disapproval.rb

@@ -2,11 +2,22 @@ class PostDisapproval < ActiveRecord::Base
   belongs_to :post
   belongs_to :user
   validates_uniqueness_of :post_id, :scope => [:user_id], :message => "have already hidden this post"
-  attr_accessible :post_id, :post, :user_id, :user
+  attr_accessible :post_id, :post, :user_id, :user, :reason
+  validates_inclusion_of :reason, :in => %w(legacy breaks_rules poor_quality disinterest)
+
+  scope :breaks_rules, lambda {where(:reason => "breaks_rules")}
+  scope :poor_quality, lambda {where(:reason => "poor_quality")}
+  scope :disinterest, lambda {where(:reason => ["disinterest", "legacy"])}
 
   def self.prune!
     joins(:post).where("posts.is_pending = FALSE AND posts.is_flagged = FALSE").each do |post_disapproval|
       post_disapproval.destroy
     end
   end
+
+  def create_downvote
+    if %w(breaks_rules poor_quality).include?(reason)
+      PostVote.create(:score => -1, :post_id => post_id)
+    end
+  end
 end