Bundler 找不到 gem 的兼容版本，正在更新 Rails 应用程序 [英] Bundler could not find compatible versions for gem, updating Rails app

问题描述

在创建了一个全新的 rails 应用程序之后按照官方的 rails 博客 post，尝试将应用程序转换为 rails 3.2.0.rc2 会产生以下结果

After createing a brand new rails app Following the official rails blog post, attempting to convert apps to rails 3.2.0.rc2 yields the following

Updated Gemfile to depend on rails ~> 3.2.0.rc2
    gem 'rails', '~>3.2.0.rc2'
Updated Gemfile to depend on sass-rails ~> 3.2.3
    gem 'sass-rails',   '~> 3.2.3'

$ bundle install
Fetching source index for http://rubygems.org/
Bundler could not find compatible versions for gem "activesupport":
  In snapshot (Gemfile.lock):
    activesupport (3.1.1)

  In Gemfile:
    rails (~> 3.2.0.rc2) ruby depends on
      activesupport (= 3.2.0.rc2) ruby

Running `bundle update` will rebuild your snapshot from scratch, using 
only the gems in your Gemfile, which may resolve the conflict.

$bundle update
Fetching source index for http://rubygems.org/
Bundler could not find compatible versions for gem "railties":
  In Gemfile:
    coffee-rails (~> 3.1.1) ruby depends on
      railties (~> 3.1.0) ruby

    rails (~> 3.2.0.rc2) ruby depends on
      railties (3.2.0.rc2)

究竟是什么问题?

Mac OS 10.7.2、Xcode 4.2.1、rvm 1.10.1 使用 ruby​​ 1.9.3p0(2011-10-30 修订版 33570)[x86_64-darwin11.2.0]

Mac OS 10.7.2, Xcode 4.2.1, rvm 1.10.1 using ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]

推荐答案

我通过删除锁 rm Gemfile.lock 并再次运行 bundle install 来解决它:

I solved it by deleting the lock rm Gemfile.lock and again running bundle install:

$ rm Gemfile.lock
$ bundle install
Using rake (0.9.2.2) 
Using i18n (0.6.0) 
Using multi_json (1.0.4) 
Using activesupport (3.2.0.rc2) 
Using builder (3.0.0) 
Using activemodel (3.2.0.rc2) 
Using erubis (2.7.0) 
Using journey (1.0.0) 
Using rack (1.4.0) 
Using rack-cache (1.1) 
Using rack-test (0.6.1) 
Using hike (1.2.1) 
Using tilt (1.3.3) 
Using sprockets (2.1.2) 
Using actionpack (3.2.0.rc2) 
Using mime-types (1.17.2) 
Using polyglot (0.3.3) 
Using treetop (1.4.10) 
Using mail (2.3.0) 
Using actionmailer (3.2.0.rc2) 
Using arel (3.0.0) 
Using tzinfo (0.3.31) 
Using activerecord (3.2.0.rc2) 
Using activeresource (3.2.0.rc2) 
Using bundler (1.0.21) 
Using coffee-script-source (1.2.0) 
Using execjs (1.2.13) 
Using coffee-script (2.2.0) 
Using rack-ssl (1.3.2) 
Using json (1.6.4) 
Using rdoc (3.12) 
Using thor (0.14.6) 
Using railties (3.2.0.rc2) 
Using coffee-rails (3.2.1) 
Using jquery-rails (2.0.0) 
Using rails (3.2.0.rc2) 
Using sass (3.1.12) 
Using sass-rails (3.2.3) 
Using sqlite3 (1.3.5) 
Using uglifier (1.2.2) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.

这是解决问题的一种非常强力的方法.如果这是一个已建立的项目，您可能会在删除 Gemfile.lock 后遇到其他问题，因为不再锁定依赖版本.但是，如果这是一个新项目，则采用这种方法不太可能遇到问题.

This is a pretty brute force way of fixing the issue. If this is an established project, you may run into other issues after deleting the Gemfile.lock as the dependency versions are no longer locked. However, if this is a new project it's unlikely you will run into problems taking this approach.

这篇关于Bundler 找不到 gem 的兼容版本，正在更新 Rails 应用程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！