将rails从5.0.2升级到5.1.0

Question

我试图通过在我的rails 5.0.2上添加gem 'rails', '~> 5.1'之后运行bundle update rails，将当前的gem 'rails', '~> 5.1'版本升级到最新的gem 'rails', '~> 5.1'版本，并收到了这条错误消息。

Bundler could not find compatible versions for gem "activesupport":
  In Gemfile:
    rails (~> 5.1) was resolved to 5.1.0, which depends on
      activejob (= 5.1.0) was resolved to 5.1.0, which depends on
        globalid (>= 0.3.6) was resolved to 0.4.0, which depends on
          activesupport (>= 4.2.0)

jbuilder (~> 2.5) was resolved to 2.6.1, which depends on
  activesupport (< 5.1, >= 3.0.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  actionpack (= 5.1.0) was resolved to 5.1.0, which depends on
    rails-dom-testing (~> 2.0) was resolved to 2.0.2, which depends on
      activesupport (< 6.0, >= 4.2.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  sprockets-rails (>= 2.0.0) was resolved to 3.2.0, which depends on
    activesupport (>= 4.0)

Answer 1

这听起来像是您需要尝试并升级到新版本的jbuilder。然而，看看RubyGems，Jbuilder当前的依赖仍然是这样的：

活动支持< 5.1，>= 3.0.0

如果是这样的话，JBuilder还不支持Rails 5.1所需要的最新的Activesupport --所以Rails 5.1中可能还没有JBuilder。

如果您需要获得更新的Rails，那么您可能应该考虑：

• 检查JBuilder中是否有这方面的路线图。
• 引发请求支持该后续Rails版本的JBuilder票据。

您可以尝试一种覆盖--因为它可能只是起作用，而且<5.1只是因为它还没有用最近的版本进行测试--如果存在真正的兼容性问题，就应该做好准备。在尝试之后，我肯定会重新运行整个测试套件。

另一种方法是稍候--这是一个非常新鲜的版本--给其他软件包一个赶上它的机会。

Answer 2

删除Gemfile.lock，然后运行bundle对我有用