Merge pull request #3932 from marpo60/improve-tags-query

don't join the tags table here, it makes the query slower

Changelog.md

@@ -14,6 +14,7 @@
 * Update and refactor the default public view `public/default.html` [#3811](https://github.com/diaspora/diaspora/issues/3811)
 * Write unicorn stderr and stdout [#3785](https://github.com/diaspora/diaspora/pull/3785)
 * Ported aspects to backbone [#3850](https://github.com/diaspora/diaspora/pull/3850)
+* Join tagging's table instead of tags to improve a bit the query [#3932](https://github.com/diaspora/diaspora/pull/3932)
 
 ## Features
 

app/models/status_message.rb

@@ -173,7 +173,7 @@ class StatusMessage < Post
 
   private
   def self.tag_stream(tag_ids)
-    joins(:tags).where(:tags => {:id => tag_ids})
+    joins(:taggings).where('taggings.tag_id IN (?)', tag_ids)
   end
 end