ruby-on-rails - Bundler 找不到 gem "builder"和 "bundler": 的兼容版本

Question

我几天前才开始使用 ruby​​。我不完全理解 gemfile 的概念。我的 Gemfile 看起来像:

source 'http://rubygems.org'

gem 'sunspot_solr', github: 'sunspot/sunspot', branch: 'master'
gem 'sunspot_rails', github: 'sunspot/sunspot', branch: 'master'

但是在运行“bundle install”时。

Bundler could not find compatible versions for gem "builder":
  In Gemfile:
    sunspot_rails (>= 0) ruby depends on
      builder (~> 2.1.2) ruby

    sunspot_rails (>= 0) ruby depends on
      builder (3.2.2)

Bundler could not find compatible versions for gem "bundler":
  In Gemfile:
    sunspot_rails (>= 0) ruby depends on
      bundler (~> 1.0.0) ruby

  Current Bundler version:
    bundler (1.3.5)

This Gemfile requires a different version of Bundler.
Perhaps you need to update Bundler by running `gem install bundler`?

应该安装哪个版本的builder，有冲突，

Answer 1

删除 Gemfile.lock 并运行 bundle install，让 Bundler 从头开始​​解决所有依赖项。