Ruby-on-rails 降级宝石的正确方法是什么？
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What's the proper way to downgrade a gem?
提问by cailinanne
I recently installed the Rails3.1-Devise-Rspec-Cucumber Starter Appwith the Gemfile listed below. This created a Gemfile.lock file (relevant snippet below) that includes factory_girl 2.0.0rc3. Unfortunately, this version of FactoryGirl is apparently completely busted.
我最近使用下面列出的 Gemfile安装了Rails3.1-Devise-Rspec-Cucumber Starter App。这创建了一个 Gemfile.lock 文件（下面的相关片段），其中包含 factory_girl 2.0.0rc3。不幸的是，这个版本的 FactoryGirl 显然完全被破坏了。
What's the proper way to force my bundle to use factory_girl 2.0.0.rc1 instead of 2.0.0rc3?
强制我的包使用 factory_girl 2.0.0.rc1 而不是 2.0.0rc3 的正确方法是什么？
Gemfile:
宝石档案：
source 'http://rubygems.org'
gem 'rails', '3.1.0.rc4'
gem 'mysql2'
gem 'sass-rails', "~> 3.1.0.rc"
gem 'coffee-script'
gem 'uglifier'
gem 'jquery-rails'
gem "therubyracer", ">= 0.8.2"
gem "rspec-rails", ">= 2.6.1", :group => [:development, :test]
gem "factory_girl_rails", ">= 1.1.beta1", :group => :test
gem "cucumber-rails", ">= 1.0.0", :group => :test
gem "capybara", ">= 1.0.0", :group => :test
gem "database_cleaner", ">= 0.6.7", :group => :test
gem "launchy", ">= 0.4.0", :group => :test
gem "devise", ">= 1.3.4"
Relevant snippet of Gemfile.lock
Gemfile.lock 的相关片段
factory_girl (2.0.0.rc3)
factory_girl_rails (1.1.rc1)
factory_girl (~> 2.0.0.rc)
railties (>= 3.0.0)
回答by chrispanda
gem "factory_girl", "2.0.0.rc1", :group => :test
in your gem file, and then run
在您的 gem 文件中，然后运行
bundle update factory_girl
