Rails4+Paperclip+ActiveAdminのメモ - Qiitahttps://github.com/thoughtbot/paperclip installation brew install imagemagick gem 'paperclip', '~> 4.1' :Bundle migration :Rails generate migration AddFileUpload :Rmigration class AddFileUpload < ActiveRecord::Migration def up add_attachment :users, :avatar end def down add_attachment :users, :avatar end end
