Question

我的实现正在使用rails 3.2版。我正在尝试将我的应用程序升级到rails 4.1但后来我开始收到错误“未初始化的常量ActiveRecord :: Transitions”。根据github（https://github.com/troessner/transitions）上的过渡gem文档，它应该与rails＆gt; = 4一起使用，没有任何问题。

带有转换的active_record类的代码如下所示。

class Coupon < ActiveRecord::Base
  has_paper_trail
  include Rails.application.routes.url_helpers 
  include ActiveRecord::Transitions

  state_machine do
    state :available
    state :issued

    event :issue do
      transitions :to => :issued, :from => :available
    end
  end
end

我得到的错误是

`<class:Coupon>': uninitialized constant ActiveRecord::Transitions (NameError)

虽然包含了宝石

gem "transitions", :require => ["transitions", "active_model/transitions"]

Answer 1

文档对include ActiveModel::Transitions说。你所做的是include ActiveRecord::Transitions。

错字可能??

未初始化的常量ActiveRecord :: Transitions with rails 4.1和transitions gem

1 个答案: