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我正在尝试从Ruby 1.9.3 to Ruby 2.1.2 (Rails 4.0). 我正在使用 RVM。

我安装了 Ruby 2.1.2，更新了 Gemfile，包括指定"gem 'paper_trail', '~> 3.0.5'"，切换到带有 RVM 的 Ruby 2.1.2，创建了一个新的 gemset，然后切换到它。

然后我做了一个捆绑安装。

当我尝试运行 rails server 时，出现以下错误：

/Users/sjohnson/my_app/config/initializers/paper_trail.rb:2:in <top (required)>': uninitialized constant PaperTrail::Rails::Engine (NameError) from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/zeus-0.13.3/lib/zeus/load_tracking.rb:50:in load' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/zeus-0.13.3/lib/zeus /load_tracking.rb:50:in load' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/zeus-0.13.3/lib/zeus/load_tracking.rb:43:in load' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/engine.rb:609:in block (2 levels) in <class:Engine>' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/engine.rb:608:in each'来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/engine.rb:608:in block in <class:Engine>' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/initializable.rb:30:in instance_exec' 来自 /Users/sjohnson/.rvm/gems /ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/initializable.rb:30:in run' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/initializable.rb:55:in block in run_initializers' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib /ruby/2.1.0/tsort.rb:226:in block in tsort_each' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:348:in block (2 levels) in each_strongly_connected_component'来自/Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb :418:在 block (2 levels) in each_strongly_connected_component_from' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:427:in each_strongly_connected_component_from' 来自 /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:417:in block in each_strongly_connected_component_from' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/initializable.rb:44:in each' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1 .2@rails4/gems/railties-4.0.5/lib/rails/initializable.rb:44:in tsort_each_child' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:411:in call' 来自 /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0 /tsort.rb:411:in each_strongly_connected_component_from' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:347:in block in each_strongly_connected_component' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:345:in each' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:345:in call' from /Users/ sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:345:in each_strongly_connected_component' from /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:224:in tsort_each' 来自 /Users/sjohnson/.rvm/rubies/ruby-2.1.2/lib/ruby /2.1.0/tsort.rb:205:in tsort_each' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/initializable.rb:54:in run_initializers' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/application.rb:215 ：在 initialize!' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/railties-4.0.5/lib/rails/railtie/configurable.rb:30:inmethod_missing'来自/Users/sjohnson/my_app/config/environment.rb:5:in<top (required)>' from /Users/sjohnson/my_app/spec/spec_helper.rb:10:in来自/Users/sjohnson/my_app/spec/spec_helper.rb:10:in<top (required)>' from /Users/sjohnson/my_app/spec/api/v1/api_authentication_spec.rb:1:in 需要'来自/Users/sjohnson/my_app/spec/ api/v1/api_authentication_spec.rb:1:in <top (required)>' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/configuration.rb:1057:in load' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/configuration。 rb:1057:in block in load_spec_files' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/configuration.rb:1057:in each' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/configuration.rb:1057:in load_spec_files' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/runner.rb:97:in setup '来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/runner.rb:85:in run' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/runner.rb:70:in run' 来自 /Users/sjohnson /.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/lib/rspec/core/runner.rb:38:in invoke' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/gems/rspec-core-3.0.3/exe/rspec:4:in ' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/bin/rspec:23:in load' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/bin/rspec:23:in ' 来自 /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/bin/ruby_executable_hooks ：15：在 eval' from /Users/sjohnson/.rvm/gems/ruby-2.1.2@rails4/bin/ruby_executable_hooks:15:in '

我试图运行： bundle exec rails generate paper_trail:install

它表明迁移文件已经存在（PaperTrail 在 1.9.3 下工作）。所以，我再次运行它： bundle exec rails generate paper_trail:install -s

它成功完成，但我有同样的问题。

配置/初始化程序/paper_trail.rb：

# the following line is required for PaperTrail >= 3.0.3 with Rails
PaperTrail::Rails::Engine.eager_load!

module PaperTrail
  class Version < ActiveRecord::Base
    attr_accessible :captain
  end
end `

想法？其他有用的信息？

编辑： 尽管在初始化文件中引用了 paper_trail 3.0.3，gem 的版本是 3.0.5（通过执行 gem 列表验证）。错误跟踪中对 3.0.3 的引用适用于 Rspec。

4

1 回答 1

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我刚刚在我的初始化程序中做了：

module PaperTrail  
  module Rails  
    class Engine < ::Rails::Engine 
      paths['app/models'] << 'lib/paper_trail/frameworks/active_record/models'  
    end 
  end 
end

我建议你把这个：

PaperTrail::Rails::Engine.eager_load!`

作为初始化程序中的最后一个字符串。

于 2014-09-09T07:26:13.150 回答