捆绑命令错误的 mysql2 gem（总是 0.3.2）答案

【问题标题】：Bundle command the wrong mysql2 gem (always 0.3.2)捆绑命令错误的 mysql2 gem（总是 0.3.2）
【发布时间】：2011-08-19 03:25:28
【问题描述】：

尝试运行 $rails 控制台时出现错误

/Library/Ruby/Gems/1.8/gems/mysql2-0.3.2/lib/mysql2/mysql2.bundle: dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.3.2/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.16.dylib (LoadError)
  Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.3.2/lib/mysql2/mysql2.bundle
  Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.3.2/lib/mysql2/mysql2.bundle
    from /Library/Ruby/Gems/1.8/gems/mysql2-0.3.2/lib/mysql2.rb:8
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/runtime.rb:64:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/runtime.rb:64:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/runtime.rb:62:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/runtime.rb:62:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/runtime.rb:51:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/runtime.rb:51:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler.rb:112:in `require'
    from /Users/ccool2486/Sites/test3mysql/config/application.rb:7
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands.rb:21:in `require'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands.rb:21
    from script/rails:6:in `require'
    from script/rails:6
ccool-2:test3mysql ccool2486$ rails console
WARNING: This version of mysql2 (0.3.2) doesn't ship with the ActiveRecord adapter bundled anymore as it's now part of Rails 3.1
WARNING: Please use the 0.2.x releases if you plan on using it in Rails <= 3.0.x
/Library/Ruby/Gems/1.8/gems/activerecord-3.0.6/lib/active_record/connection_adapters/abstract/connection_specification.rb:71:in `establish_connection': Please install the mysql2 adapter: `gem install activerecord-mysql2-adapter` (no such file to load -- active_record/connection_adapters/mysql2_adapter) (RuntimeError)
    from /Library/Ruby/Gems/1.8/gems/activerecord-3.0.6/lib/active_record/connection_adapters/abstract/connection_specification.rb:60:in `establish_connection'
    from /Library/Ruby/Gems/1.8/gems/activerecord-3.0.6/lib/active_record/connection_adapters/abstract/connection_specification.rb:55:in `establish_connection'
    from /Library/Ruby/Gems/1.8/gems/activerecord-3.0.6/lib/active_record/railtie.rb:59
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.6/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.6/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.6/lib/active_support/lazy_load_hooks.rb:43:in `run_load_hooks'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.6/lib/active_support/lazy_load_hooks.rb:42:in `each'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.6/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
    from /Library/Ruby/Gems/1.8/gems/activerecord-3.0.6/lib/active_record/base.rb:1903
    from /Library/Ruby/Gems/1.8/gems/activerecord-3.0.6/lib/active_record/railtie.rb:32
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.6/lib/active_support/dependencies.rb:239:in `call'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.6/lib/active_support/dependencies.rb:239:in `to_proc'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/railtie.rb:180:in `each'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/railtie.rb:180:in `load_console'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/application.rb:154:in `load_console'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/application/railties.rb:11:in `each'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/application/railties.rb:11:in `all'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/application.rb:154:in `load_console'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands/console.rb:26:in `start'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands/console.rb:8:in `start'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands.rb:23
    from script/rails:6:in `require'
    from script/rails:6

嗯...所以我尝试卸载 mysql2 gem，并重新安装版本 0.2.7 gem

 sudo gem uninstall mysql2 -i /Library/Ruby/Gems/1.8

我更改了 gemfile：

gem 'mysql2','0.2.7'

在我的应用目录中运行 Bundler：

bundle install

但它又重新安装了 0.3.2 版！！！谁能帮忙，老实说我不知道这里发生了什么。

【问题讨论】：

同样的问题 - 破坏了我的应用程序。我开始严重不喜欢 Bundler。令人讨厌的是它会自动更新宝石而不询问。必须有办法防止这种情况发生。看看我能做些什么，如果我找到解决方案，我会在这里发布。
谢谢，这个问题的答案是我将来需要做的 100 个其他修复的模型。

标签： ruby-on-rails gem bundler mysql2

【解决方案1】：

sudo gem uninstall mysql2

在 Gemfile gem 'mysql2', '< 0.3'

bundle update

【讨论】：

【解决方案2】：

和你的

gem 'mysql2','0.2.7'

试试

bundle update

它从头开始构建包

【讨论】：