尝试生成设计时出错：在Ruby on Rails中安装

Question

我是Ruby on Rails的新手，我试图从Internet中做一些示例。但是当我尝试生成设计安装时出现错误。 我修改了Gemfile，加入了gem devise。然后运行：

bundle install 

但是当我运行。

rails generate devise:install 

我有一个错误：

/usr/local/lib/ruby/gems/0.9.1/gems/devise-1.1.3/lib/devise.rb:193:in `mailer=': undefined method `ref' for ActiveSupport::Dependencies:Module (NoMethodError) 
    from /usr/local/lib/ruby/gems/1.9.1/gems/devise-1.1.3/lib/devise.rb:195:in `<module:Devise>' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/devise-1.1.3/lib/devise.rb:4:in `<top (required)>' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.5/lib/bundler.rb:132:in `require' 
    from /home/mihai/Desktop/blog/config/application.rb:7:in `<top (required)>' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.13/lib/rails/commands.rb:24:in `require' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.13/lib/rails/commands.rb:24:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

请帮帮我！

Answer 1

Devise的版本比较陈旧。

你可以这样做：

bundle update devise 

然后：

bundle install 

这应该升级设计的宝石。

Answer 2

它应该是：

rails generate devise_install 

，而不是：

rails generate devise:install