deviseの導入 - Qiita=============================================================================== Some setup you must do manually if you haven't yet: 1. Ensure you have defined default url options in your environments files. Here is an example of default_url_options appropriate for a development environment in config/environments/development.rb: config.action_mailer.default_url_options = { :host => 'localhost:3000'
rails console の tips - Qiita
