ruby-on-rails - 迁移 : change column from integer to string

Question

谁能告诉我如何编辑以下迁移以更改 :phone整数到字符串？

class CreateContactInfos < ActiveRecord::Migration
  def change
    create_table :contact_infos do |t|
      t.integer :phone
      t.string :facebook
      t.references :user

      t.timestamps 
    end
    add_index :contact_infos, :user_id
  end
end

提前致谢!

Answer 1

我猜你已经迁移了你展示的那个，所以创建另一个你放置的:

change_column :contact_infos, :phone, :string