无法启动rails服务器

Question

我已经安装了rails和mysql。 我也安装了mysql2 gem。 我通过命令rails创建了一个rails应用程序new try_cms -d mysql它已成功创建。 但是当我尝试使用rails server命令运行WEBrick服务器时，我收到以下错误。

/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-1.0.9/lib/bundler/runtime.rb:68:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.9/lib/bundler/runtime.rb:68:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.9/lib/bundler/runtime.rb:66:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.9/lib/bundler/runtime.rb:66:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.9/lib/bundler/runtime.rb:55:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.9/lib/bundler/runtime.rb:55:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.9/lib/bundler.rb:114:in `require'
    from /Users/dilippednekar/Sites/try_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

提前致谢。

Answer 1

试试这个（看这里的类似问题）

sudo install_name_tool -change libmysqlclient.16.dylib /usr/local/mysql/lib/libmysqlclient.16.dylib /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle

Answer 2

我自己遇到了这个问题。 确保更新版本号。

sudo install_name_tool -change libmysqlclient.18.dylib /usr/local/mysql/lib/libmysqlclient.18.dylib /Library/Ruby/Gems/1.8/gems/mysql2-0.2.7/lib/mysql2/mysql2.bundle

Answer 3

由于某种原因，mysql2.bundle文件不在我的mysql2 gem中。 我跑了

 gem uninstall mysql2

并且宝石已卸载。 然后我马上跑了

sudo gem install mysql2

然后

sudo install_name_tool -change libmysqlclient.16.dylib /usr/local/mysql/lib/libmysqlclient.16.dylib /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle

最后rails s推出了服务器！

Answer 4

我有类似的问题。 在这里找到了对我有用的解决方案。

Answer 5

如果你想要一些不那么具有侵入性的东西，只需在MySQL的lib方向设置DYLD_LIBRARY_PATH环境变量即可。

export DYLD_LIBRARY_PATH=$MYSQL_HOME/lib

Answer 6

sudo apt-get install libmysqlclient15-dev libmysqlclient15off libmysql-ruby

Answer 7

我刚刚使用Rails 3.1.0，ruby-1.9.2-p290和mysql2 0.3.7。 我的解决方案是降级到mysql 2.8.1。 到目前为止一切看起来都很好（我甚至无法启动环境）。