paper clip 使用

rails g paperclip user avatar



这样生成了一个migration file,下面这段是自动生成滴

view sourceprint?

01	class AddAttachmentAvatarToUser< ActiveRecord::Migration

02	def self.up

03	add_column :users, :avatar_file_name, :string

04	add_column :users, :avatar_content_type, :string

05	add_column :users, :avatar_file_size, :integer

06	add_column :users, :avatar_updated_at, :datetime

07

end

08

09	def self.down

10	remove_column :users, :avatar_file_name

11	remove_column :users, :avatar_content_type

12	remove_column :users, :avatar_file_size

13	remove_column :users, :avatar_updated_at

14

end

15

end