fix build

app/models/upload.rb

@@ -87,6 +87,8 @@ class Upload < ActiveRecord::Base
 
     path = uri.path[/(\/original\/\dX\/[\/\.\w]+)/, 1]
 
+    return if path.blank?
+
     Upload.find_by("url LIKE ?", "%#{path}")
   end
 

lib/search.rb

@@ -476,13 +476,17 @@ class Search
   advanced_filter(/filetypes?:([a-zA-Z0-9,\-_]+)/) do |posts, match|
     file_extensions = match.split(",").map(&:downcase)
     posts.where("posts.id IN (
-      SELECT post_id FROM topic_links
-      WHERE extension IN (:file_extensions)
+      SELECT post_id
+        FROM topic_links
+       WHERE extension IN (:file_extensions)
+
       UNION
-      SELECT post_uploads.post_id FROM uploads
-      JOIN post_uploads ON post_uploads.upload_id = uploads.id
-      WHERE lower(uploads.extension) IN (:file_extensions)
-      )", file_extensions: file_extensions)
+
+      SELECT post_uploads.post_id
+        FROM uploads
+        JOIN post_uploads ON post_uploads.upload_id = uploads.id
+       WHERE lower(uploads.extension) IN (:file_extensions)
+    )", file_extensions: file_extensions)
   end
 
   private