class InitUseIndex < ActiveRecord::Migration[5.2]
  def change
    remove_index :users, name: :index_users_on_login if index_exists?(:users, :login, name: :index_users_on_login)
    remove_index :users, name: :index_users_on_mail if index_exists?(:users, :mail, name: :index_users_on_mail)
    add_index :users, :login, unique: true
    add_index :users, :mail, unique: true
    add_index :users, :phone, unique: true
  end
end