Merge branch 'issue_12658' into 'master'

Check if index exists before adding it I got an error when updating GDK because it already exists. [ci skip] See merge request !3335

Merge branch 'issue_12658' into 'master'
383ead5d · Robert Speicher · 3a78f7ca · cbdbbcbc · 383ead5d
Commit 383ead5d authored Mar 22, 2016 by Robert Speicher
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20160320204112_index_namespaces_on_visibility_level.rb ...te/20160320204112_index_namespaces_on_visibility_level.rb +3 -1

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--- a/db/migrate/20160320204112_index_namespaces_on_visibility_level.rb
+++ b/db/migrate/20160320204112_index_namespaces_on_visibility_level.rb
 class IndexNamespacesOnVisibilityLevel < ActiveRecord::Migration
  def change
-    add_index :namespaces, :visibility_level
+    unless index_exists?(:namespaces, :visibility_level)
+      add_index :namespaces, :visibility_level
+    end
  end
 end