fixed tests, implemented sql based partitioning for favorites

app/models/favorite.rb

@@ -1,22 +1,4 @@
 class Favorite < ActiveRecord::Base
-  TABLE_COUNT = 100
   belongs_to :post
-  
   scope :for_user, lambda {|user_id| where("user_id = ?", user_id)}
-  
-  def self.model_for(user_id)
-    mod = user_id.to_i % TABLE_COUNT
-    Object.const_get("Favorite#{mod}")
-  end
-  
-  def self.delete_post(post_id)
-    0.upto(TABLE_COUNT - 1) do |i|
-      model_for(i).destroy_all(:post_id => post_id)
-    end
-  end
-end
-
-0.upto(Favorite::TABLE_COUNT - 1) do |i|
-  Object.const_set("Favorite#{i}", Class.new(Favorite))
-  Object.const_get("Favorite#{i}").set_table_name("favorites_#{i}")
 end