-require 'migrate'
+require "migrate"
-class AddLowercaseUserIndexes < ActiveRecord::Migration
+class AddLowercaseUserIndexes < ActiveRecord::Migration[4.2]
def up
add_index :users, [], :columns => "LOWER(display_name)", :name => "users_display_name_lower_idx"
add_index :users, [], :columns => "LOWER(email)", :name => "users_email_lower_idx"