gistfile1.diff

   def tag
     @tag = params[:tag]
-    if @tag =~ /,/
-      @posts = []
-      @tag.split(",").each do |tag|
-        @posts << Post.find(:all, :conditions => ["tags LIKE ?", "%#{tag}%"] ).map {|p| p.id }
-      end
-      @posts = @posts.flatten.uniq.sort.reverse
-      @posts.map! {|post| Post.find(post) }
-    else
-      @posts = Post.find(:all, :conditions => [ "tags LIKE ?", "%#{@tag}%"] ).reverse
-    end
+    @tag = @tag.split(",") if @tag =~ /,/
+    @posts = Post.all(:conditions => { :tags => @tag }, :order => 'created_at desc' )
 
     respond_to do |format|
       format.html