Check if index exists before adding it. [ci skip]

* I got an error when updating GDK because it already exists.

Check if index exists before adding it. [ci skip]
cbdbbcbc · Rubén Dávila · 3a78f7ca · cbdbbcbc
Commit cbdbbcbc authored Mar 21, 2016 by Rubén Dávila
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20160320204112_index_namespaces_on_visibility_level.rb ...te/20160320204112_index_namespaces_on_visibility_level.rb +2 -0

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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
+    unless index_exists?(:namespaces, :visibility_level)
      add_index :namespaces, :visibility_level
    end
+  end
 end