better error message when searching comments with metatags

app/controllers/comments_controller.rb

@@ -2,7 +2,8 @@ class CommentsController < ApplicationController
   respond_to :html, :xml, :json
   before_filter :member_only, :only => [:update, :create, :edit, :destroy]
   rescue_from User::PrivilegeError, :with => "static/access_denied"
-
+  rescue_from ActiveRecord::StatementInvalid, :with => :search_error
+  
   def index
     if params[:group_by] == "comment"
       index_by_comment
@@ -90,4 +91,16 @@ private
       raise User::PrivilegeError
     end
   end
+
+protected
+  
+  def search_error(e)
+    if e.message =~ /syntax error in tsquery/
+      @error_message = "Meta-tags are not supported in comment searches by tag"
+      render :template => "static/error", :status => 500
+    else
+      @exception = e
+      render :template => "static/error", :status => 500
+    end
+  end
 end

app/logical/post_sets/post.rb

@@ -42,12 +42,21 @@ module PostSets
         raise SearchError.new("Upgrade your account to search more than two tags at once")
       end
 
+      timeout = 3000
+      
       if tag_array.any? {|x| x =~ /^source:.*\*.*pixiv/}
-        raise SearchError.new("Your search took too long to execute and was canceled")
+        timeout = 300
       end
       
       @posts ||= begin
-        temp = ::Post.tag_match(tag_string).paginate(page, :count => ::Post.fast_count(tag_string), :limit => per_page)
+        temp = ::Post.with_timeout(500, nil) do
+          ::Post.tag_match(tag_string).paginate(page, :count => ::Post.fast_count(tag_string), :limit => per_page)
+        end
+        
+        if temp.nil?
+          raise SearchError.new("Your search took too long to execute and was canceled")
+        end
+
         temp.all
         temp
       end

app/views/comments/search.html.erb

@@ -7,7 +7,7 @@
       
       <%= search_field "body_matches", :label => "Body" %>
       <%= search_field "creator_name", :label => "User" %>
-      <%= search_field "post_tags_match", :label => "Tags" %>
+      <%= search_field "post_tags_match", :label => "Tags", :hint => "Meta-tags not supported" %>
       <%= submit_tag "Search" %>
     <% end %>
   </div>