ruby-on-rails - 升级rails版本时遇到的问题

Question

当我运行捆绑安装时，它显示:

Fetching gem metadata from https://rubygems.org/........
Fetching additional metadata from https://rubygems.org/..
Resolving dependencies...
You have requested:
  rails = 4.2.1

The bundle currently has rails locked at 4.1.0.
Try running `bundle update rails`

然后我运行:bundle updaterails 它给出:

Fetching gem metadata from https://rubygems.org/........
Fetching additional metadata from https://rubygems.org/..
Resolving dependencies...
Bundler could not find compatible versions for gem "railties":
  In Gemfile:
    devise (>= 0) ruby depends on
      responders (>= 0) ruby depends on
        railties (< 4.2, >= 3.2) ruby

    rails (= 4.2.1) ruby depends on
      railties (4.2.1)

请帮我解决这个问题。提前致谢。

Answer 1

您似乎使用的是旧版本的设备 - 您需要更新您的设备版本才能与 Rails 4.2 配合使用(捆绑更新设备)。一旦设备更新到3.4.x，就可以使用railties v4.2.1。