库未加载:尝试使用 mysql2 gem 在 OS X 10.6 上运行“rails server"时出现 libmysqlclient.16.dylib 错误

2021-11-20 00:00:00 ruby-on-rails mysql webrick rubygems

我已经为此苦苦挣扎了一段时间.

I've been struggling with this for some time.

我已经在我的 Snow Leopard 机器上安装了 Rails 3、gem、mysql.一切都很顺利，直到我创建了我的第一个项目并尝试运行

I've installed Rails 3, gem, mysql on my Snow Leopard machine. All was going well until I created my first project and tried to run 

rails server

运行后我得到:

jontybrook$ rails server
/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle: dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.16.dylib (LoadError)
  Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
  Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
    from /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2.rb:7
    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/jontybrook/Dropbox/CODING/simple_cms/config/application.rb:7
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.3/lib/rails/commands.rb:28:in `require'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.3/lib/rails/commands.rb:28
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.3/lib/rails/commands.rb:27:in `tap'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.3/lib/rails/commands.rb:27
    from script/rails:6:in `require'
    from script/rails:6
jontybrook$

据我所知，问题出在 mysql2 gem 上.MySQL 似乎运行良好，我的 Gemfile 引用了 mysql2，我的 database.yml 文件似乎也正常.

As far as I can tell the problem is with the mysql2 gem. MySQL seems to be running fine and my Gemfile references mysql2, my database.yml file seems ok also.

错误提到

Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle

还有

jontybrook$ cd /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2
jontybrook$ ls
client.rb   em.rb       error.rb      mysql2.bundle result.rb

MySQL2.bundle 有没有！?

MySQL2.bundle is there!?

如果我使用旧的 mysql gem，WEBrick 启动正常.但这并不理想，不是吗?

If I use the old mysql gem, WEBrick boots fine. But that's not ideal, is it?

我已经尝试了谷歌能给我的一切！非常感谢任何帮助.

I've tried everything google can give me! Any help much appreciated.

推荐答案

我从来没能得到这些答案中的任何一个对我有用，但这是我用来让它对我有用的命令.这样你就不需要每次更新你的mysql时都使用 install_name_tool

I was never able to get any of these answers to work for me, but this is the command that I used to make it work for me. This way you don't need to use install_name_tool every time you update your mysql 

sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib

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