db/migrate/20171118012443_add_moved_to_account_id_to_accounts.rb


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class AddMovedToAccountIdToAccounts < ActiveRecord::Migration[5.1]
  def change
    add_column :accounts, :moved_to_account_id, :bigint, null: true, default: nil
    add_foreign_key :accounts, :accounts, column: :moved_to_account_id, on_delete: :nullify
  end
end