POSTGRES CHANGE COLUMN TYPE

POSTGRES CHANGE COLUMN TYPE

class ChangeMessages < ActiveRecord::Migration
  def change
    rename_column :messages, :recipient_ids, :old_recipient_ids
    add_column :messages, :recipient_ids, :integer, array: true

    Message.all.each do |message|
      message.recipient_ids = message.old_recipient_ids
      message.save!(validate: false)
    end

    remove_column :messages, :old_recipient_ids
  end
end