require "migrate" class AddLowercaseUserIndexes < ActiveRecord::Migration[5.0] 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" end def down remove_index :users, :name => "users_email_lower_idx" remove_index :users, :name => "users_display_name_lower_idx" end end