Question

这是一个奇怪的。我在运行rake进行测试时遇到此错误，但在迁移时却没有。我正在运行RVM，下面的shell转储应该提供您需要的任何信息。

非常感谢任何帮助。我见过其他一些人有这个问题，但没有解决方案对我有用（或者他们）。

感谢。

$ rake
Could not find rake-0.9.2.2 in any of the sources
Run `bundle install` to install missing gems.
Could not find rake-0.9.2.2 in any of the sources
Run `bundle install` to install missing gems.
Errors running test:units, test:functionals, test:integration!



$ ruby -v
    ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.4.0]
    $ rails -v
    Rails 3.1.6

$ more .rvmrc 
rvm ruby-1.9.3-p194@...
$ rake db:rollback
==  AddAllLocationsToAlert: reverting =========================================
-- remove_column(...
   -> 0.0320s
==  AddAllLocationsToAlert: reverted (0.0321s) ================================

-------编辑::::

我已经升级到最新的Rails - 3.2.6。即使我使用'bundle exec'，错误仍然会发生。（这对于3.2.6来说并不新鲜 - 我仍然在3.1下得到了这个问题。）未定义的方法虽然是新的。

Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
$ bundle exec rake
Could not find rake-0.9.2.2 in any of the sources
Run `bundle install` to install missing gems.
Could not find rake-0.9.2.2 in any of the sources
Run `bundle install` to install missing gems.
Errors running test:units! #<NoMethodError: undefined method `[]' for nil:NilClass>
Errors running test:functionals! #<RuntimeError: Command failed with status (7): [/Users/ben/.rvm/rubies/ruby-1.9.3-p194/bin...]>
Errors running test:integration! #<RuntimeError: Command failed with status (7): [/Users/ben/.rvm/rubies/ruby-1.9.3-p194/bin...]>

我的Gemfile，按要求：

source 'http://rubygems.org'

gem 'rails', '3.2.6'

group :assets do
  gem 'sass-rails', "  ~> 3.2.5"
  gem 'coffee-rails', "~> 3.2.1"
  gem 'uglifier', '>= 1.2.6'
end

gem 'jquery-rails'

gem 'rake'
gem "mysql2"

gem "squeel"
gem 'tinymce-rails'
gem 'dynamic_form'

gem 'will_paginate'
gem 'devise'
gem 'whitelist'
gem 'rmagick'
gem 'json'
gem 'paperclip'
gem 'acts_as_list', :git => 'https://github.com/swanandp/acts_as_list'
gem 'htmlentities'
gem 'formtastic'
# Bundle gems for the local environment. Make sure to
# put test-only gems in this group so their generators
# and rake tasks are available in development mode:
# group :development, :test do
#   gem 'webrat'
# end

Answer 1

你的Gemfile中有

gem'rake'，“＆gt; = 0.9.2”＃

然后

$ bundle install

然后

$ bundle exec rake

如果以上不起作用：

$ rvm all do gem install rake -v 0.9.2.2 #install rake to all ruby versions

然后再次运行rake

Answer 2

如果您正在使用bundler（并且可能使用rails），请始终像这样运行rake：

bundle exec rake

这将获取Gemfile中指定的gem。

在任何来源中都找不到rake-0.9.2.2

2 个答案: