无法使用 ruby-mysql gem 连接到 MySQL答案

【问题标题】：Unable to connect to MySQL using ruby-mysql gem无法使用 ruby-mysql gem 连接到 MySQL
【发布时间】：2012-10-03 08:28:17
【问题描述】：

我使用 bundler 安装了 ruby-mysql gem。但是 Mysql.connect 崩溃并出现以下跟踪。

/home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/ruby-mysql-2.9.10/lib/mysql/protocol.rb:167:in `initialize': No such file or directory - /tmp/\
mysql.sock (Errno::ENOENT)
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/ruby-mysql-2.9.10/lib/mysql/protocol.rb:167:in `new'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/ruby-mysql-2.9.10/lib/mysql/protocol.rb:167:in `block in initialize'
        from /home/kris/.rvm/rubies/ruby-1.9.3-p194-perf/lib/ruby/1.9.1/timeout.rb:54:in `timeout'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/ruby-mysql-2.9.10/lib/mysql/protocol.rb:164:in `initialize'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/ruby-mysql-2.9.10/lib/mysql.rb:114:in `new'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/ruby-mysql-2.9.10/lib/mysql.rb:114:in `connect'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/ruby-mysql-2.9.10/lib/mysql.rb:49:in `new'
        from /home/kris/dev/dispatch/application.rb:38:in `<top (required)>'
        from config.ru:1:in `require'
        from config.ru:1:in `block in <main>'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/rack-1.3.6/lib/rack/builder.rb:51:in `instance_eval'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/rack-1.3.6/lib/rack/builder.rb:51:in `initialize'
        from config.ru:1:in `new'
        from config.ru:1:in `<main>'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/thin-1.4.1/lib/rack/adapter/loader.rb:33:in `eval'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/thin-1.4.1/lib/rack/adapter/loader.rb:33:in `load'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/thin-1.4.1/lib/thin/controllers/controller.rb:181:in `load_rackup_config'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/thin-1.4.1/lib/thin/controllers/controller.rb:71:in `start'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/thin-1.4.1/lib/thin/runner.rb:185:in `run_command'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/thin-1.4.1/lib/thin/runner.rb:151:in `run!'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/gems/thin-1.4.1/bin/thin:6:in `<top (required)>'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/bin/thin:23:in `load'
        from /home/kris/.rvm/gems/ruby-1.9.3-p194-perf@dispatch/bin/thin:23:in `<main>'

我的机器运行的是 Ubuntu 12.04，我已经安装了 libmysqlclient-dev。我该如何解决这个问题？

谢谢

【问题讨论】：

尝试重新安装mysql gem -- sudo gem install mysql

标签： mysql ruby rvm bundler

【解决方案1】：

我认为您应该只更改 database.yml 中的套接字。

尝试改变它

/tmp/mysql.sock

到

/var/run/mysqld/mysqld.sock

【讨论】：