ruby-on-rails – sass-rails需要链轮2.0.0但是轨道4.1.0需要链轮2.12.1

参见英文答案 > Updating from Rails 4.0 to 4.1 gives sass-rails railties version conflicts                                    4个
我正在尝试将我的应用程序从rails 3.2.16升级到rails 4.1.0,当我尝试调用bundler时,我开始遇到麻烦：

Bundler could not find compatible versions for gem "sprockets":
  In Gemfile:
    sass-rails (>= 0) ruby depends on
      sprockets (~> 2.0.0) ruby

    rails (= 4.1.0) ruby depends on
      sprockets-rails (~> 2.0) ruby depends on
        sprockets (2.12.1)

Bundler could not find compatible versions for gem "sprockets-rails":
  In Gemfile:
    sass-rails (>= 0) ruby depends on
      sprockets-rails (~> 2.0.0) ruby

    rails (= 4.1.0) ruby depends on
      sprockets-rails (2.1.3)

Bundler could not find compatible versions for gem "railties":
  In Gemfile:
    sass-rails (>= 0) ruby depends on
      railties (~> 3.1.0) ruby

    rails (= 4.1.0) ruby depends on
      railties (4.1.0)

我的Gemfile的(部分)：

gem 'rails', '4.1.0'
gem 'mysql2'
gem "rake"
gem "less-rails" #Sprockets (what Rails 3.1 uses for its asset pipeline) supports LESS
gem 'sass-rails'

Bundler的某些旧版本有一个可能导致此故障无法解决的错误.更新到最新版本可能会有所帮助.

运行此更新：

gem install bundler