升级到Rails 6时出现依赖项错误

Question

我删除了我的Gemfile.lock，将我的gem 'rails', '5.2'更改为gem 'rails', '6.0'，然后进行捆绑安装。

我得到了很多依赖错误。但是我不能理解他们，因为他们看起来还不错。

我收到的错误如下：

Bundler could not find compatible versions for gem "pry":
  In Gemfile:
    guard-rspec (~> 4.7.0) was resolved to 4.7.3, which depends on
      guard (~> 2.1) was resolved to 2.16.2, which depends on
        pry (>= 0.9.12)

    pry-doc was resolved to 1.1.0, which depends on
      pry (~> 0.11)

    pry-nav was resolved to 0.3.0, which depends on
      pry (>= 0.9.10, < 0.13.0)

    pry-rails was resolved to 0.3.9, which depends on
      pry (>= 0.10.4)

还有更多的..在上面看起来依赖关系应该很好，即pry-doc的0.11比所有其他的都大，并且它们都指定大于或等于。

Answer 1

事实证明，指定最新版本的rails解决了这个问题。

最初在我的Gemfile中，我有：

gem 'rails', '6.0'

但当我这么做的时候

gem 'rails', '6.0.3.6'

和捆绑包安装，我没有得到这样的依赖错误