more aggressive timeout constraints for loose source queries

app/controllers/posts_controller.rb

@@ -4,6 +4,7 @@ class PostsController < ApplicationController
   respond_to :html, :xml, :json
   rescue_from PostSets::SearchError, :with => :rescue_exception
   rescue_from Post::SearchError, :with => :rescue_exception
+  rescue_from ActiveRecord::StatementInvalid, :with => :rescue_exception
   
   def index
     @post_set = PostSets::Post.new(tag_query, params[:page], params[:limit])

app/logical/post_sets/post.rb

@@ -43,7 +43,15 @@ module PostSets
       end
       
       @posts ||= begin
-        temp = ::Post.tag_match(tag_string).paginate(page, :count => ::Post.fast_count(tag_string), :limit => per_page)
+        timeout = 3000
+        if tag_string =~ /source:.*\*.*\*$/
+          timeout = 300
+        end
+        
+        temp = ::Post.with_timeout(timeout, Danbooru.config.blank_tag_search_fast_count || 1_000_000) do
+          ::Post.tag_match(tag_string).paginate(page, :count => ::Post.fast_count(tag_string), :limit => per_page)
+        end
+        
         temp.all
         temp
       end

app/models/post.rb

@@ -152,7 +152,7 @@ class Post < ActiveRecord::Base
   
   module ImageMethods
     def has_large?
-      image_width > Danbooru.config.large_image_width
+      image_width.present? && image_width > Danbooru.config.large_image_width
     end
     
     def has_large