refactored post search

app/models/post.rb

@@ -43,7 +43,7 @@ class Post < ActiveRecord::Base
   scope :for_user, lambda {|user_id| where(["uploader_id = ?", user_id])}
   scope :available_for_moderation, lambda {|hidden| hidden.present? ? where(["id IN (SELECT pd.post_id FROM post_disapprovals pd WHERE pd.user_id = ?)", CurrentUser.id]) : where(["id NOT IN (SELECT pd.post_id FROM post_disapprovals pd WHERE pd.user_id = ?)", CurrentUser.id])}
   scope :hidden_from_moderation, lambda {where(["id IN (SELECT pd.post_id FROM post_disapprovals pd WHERE pd.user_id = ?)", CurrentUser.id])}
-  scope :tag_match, lambda {|query| Post.tag_match_helper(query)}
+  scope :tag_match, lambda {|query| PostQueryBuilder.new(query).build}
   scope :positive, where("score > 1")
   scope :negative, where("score < -1")
   search_methods :tag_match
@@ -568,13 +568,6 @@ class Post < ActiveRecord::Base
     end
   end
   
-  module SearchMethods
-    def tag_match_helper(q)
-      builder = PostQueryBuilder.new(q)
-      builder.build
-    end
-  end
-  
   module UploaderMethods
     def initialize_uploader
       if uploader_id.blank?
@@ -904,7 +897,6 @@ class Post < ActiveRecord::Base
   include FavoriteMethods
   include UploaderMethods
   include PoolMethods
-  extend SearchMethods
   include VoteMethods
   extend CountMethods
   include CacheMethods

app/models/tag.rb

@@ -211,7 +211,7 @@ class Tag < ActiveRecord::Base
         :include => [],
         :exclude => []
       }
-
+      
       scan_query(query).each do |token|
         if token =~ /\A(-uploader|uploader|-approver|approver|-pool|pool|-fav|fav|sub|md5|-rating|rating|width|height|mpixels|score|filesize|source|id|date|order|status|tagcount|gentags|arttags|chartags|copytags|parent):(.+)\Z/
           case $1
@@ -308,7 +308,7 @@ class Tag < ActiveRecord::Base
           parse_tag(token, q[:tags])
         end
       end
-
+      
       normalize_tags_in_query(q)
 
       return q

app/models/tag_alias.rb

@@ -26,6 +26,7 @@ class TagAlias < ActiveRecord::Base
   def process!
     update_column(:status, "processing")
     update_posts
+    clear_all_cache
     update_column(:status, "active")
   rescue Exception => e
     update_column(:status, "error: #{e}")