Question

我正在开发Rails引擎（目前正在使用Rails 4.1.6）。当我尝试运行任何Rake任务时出现此错误：

$ bundle exec rake app:db:migrate --trace
** Invoke load_app (first_time)
** Execute load_app
rake aborted!
NameError: uninitialized constant Thor::Base
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/bundler-1.7.3/lib/bundler/ui/shell.rb:12:in `initialize'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/bundler-1.7.3/lib/bundler/gem_helper.rb:26:in `new'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/bundler-1.7.3/lib/bundler/gem_helper.rb:26:in `initialize'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/bundler-1.7.3/lib/bundler/gem_helper.rb:13:in `new'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/bundler-1.7.3/lib/bundler/gem_helper.rb:13:in `install_tasks'
/Users/andrew/example_rails_engine/Rakefile:10:in `<top (required)>'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/rake_module.rb:28:in `load'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/rake_module.rb:28:in `load_rakefile'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/application.rb:687:in `raw_load_rakefile'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/application.rb:94:in `block in load_rakefile'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/application.rb:93:in `load_rakefile'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/application.rb:77:in `block in run'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/lib/rake/application.rb:75:in `run'
/Users/andrew/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/rake-10.3.2/bin/rake:33:in `<top (required)>'
/Users/andrew/.rbenv/versions/2.1.3/bin/rake:23:in `load'
/Users/andrew/.rbenv/versions/2.1.3/bin/rake:23:in `<main>'

我的Rakefile如下：

begin
  require 'bundler/setup'
rescue LoadError
  puts 'You must `gem install bundler` and `bundle install` to run rake tasks'
end

APP_RAKEFILE = File.expand_path("../spec/dummy/Rakefile", __FILE__)
load 'rails/tasks/engine.rake'

Bundler::GemHelper.install_tasks

这个错误对我没有意义。我猜Thor是Rails Rake任务的依赖。这个错误来自何处以及如何解决？

Answer 1

添加

 require 'thor'

之前<{1>}

RakeFile

为我解决了这个问题

Answer 2

这似乎是一个问题：

Bundler：https://github.com/bundler/bundler/issues/3205
或guard-rspec：https://github.com/guard/guard-rspec/issues/258

Guard将Thor列为依赖项，而Bundler则提供自己版本的Thor，导致某种冲突。

我能够通过更改加载代码的顺序来临时解决问题：

在这些行上方移动此行：Bundler::GemHelper.install_tasks：

APP_RAKEFILE = File.expand_path("../spec/dummy/Rakefile", __FILE__)
load 'rails/tasks/engine.rake'

如何修复＆＃34; NameError：未初始化的常数Thor :: Base＆＃34;错误？

2 个答案: