From 63e25c2bb40d8e85897a50c94301511553b4a266 Mon Sep 17 00:00:00 2001
From: James Brooks <jbrooksuk@me.com>
Date: Wed, 27 Aug 2014 21:08:40 +0100
Subject: [PATCH] Fixes #7571

---
 db/migrate/20140729152420_migrate_taggable_labels.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/db/migrate/20140729152420_migrate_taggable_labels.rb b/db/migrate/20140729152420_migrate_taggable_labels.rb
index f164015506d..dc28d727d9a 100644
--- a/db/migrate/20140729152420_migrate_taggable_labels.rb
+++ b/db/migrate/20140729152420_migrate_taggable_labels.rb
@@ -2,6 +2,12 @@ class MigrateTaggableLabels < ActiveRecord::Migration
   def up
     taggings = ActsAsTaggableOn::Tagging.where(taggable_type: ['Issue', 'MergeRequest'], context: 'labels')
     taggings.find_each(batch_size: 500) do |tagging|
+      # Clean up orphaned taggings while we are here
+      if tagging.taggable.blank? || tagging.tag.nil?
+        tagging.destroy
+        print 'D'
+        next
+      end
       create_label_from_tagging(tagging)
     end
   end
-- 
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