Merge pull request mastodon#116 from CrossGate-Pawoo/group

Use Status.group instead of Status.distinct in HashQueryService

Author: abcang

app/controllers/api/v1/timelines/tag_controller.rb

@@ -35,9 +35,7 @@ def tagged_statuses
       )
 
       if truthy_param?(:only_media)
-        # `SELECT DISTINCT id, updated_at` is too slow, so pluck ids at first, and then select id, updated_at with ids.
-        status_ids = statuses.joins(:media_attachments).distinct(:id).pluck(:id)
-        statuses.where(id: status_ids)
+        statuses.joins(:media_attachments)
       else
         statuses
       end

app/services/hashtag_query_service.rb

@@ -6,7 +6,7 @@ def call(tag, params, account = nil, local = false)
     all  = tags_for(params[:all])
     none = tags_for(params[:none])
 
-    Status.distinct
+    Status.group(:id)
           .as_tag_timeline(tags, account, local)
           .tagged_with_all(all)
           .tagged_with_none(none)