错误:
/Users/askar/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mysql2-0.3.20/lib/mysql2.rb:31:in `require': dlopen(/Users/askar/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0-static/mysql2-0.3.20/mysql2/mysql2.bundle, 9): Library not loaded: /usr/local/lib/libmysqlclient.18.dylib (LoadError)
Referenced from: /Users/askar/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0-static/mysql2-0.3.20/mysql2/mysql2.bundle
Reason: image not found - /Users/askar/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0-static/mysql2-0.3.20/mysql2/mysql2.bundle
在 Gemfile 文件中添加:gem 'mysql2'
$ ls -al /usr/local/lib/libmysql*lrwxr-xr-x 1 askar admin 49 Nov 13 10:48 /usr/local/lib/libmysqlclient.20.dylib -> ../Cellar/mysql/5.7.9/lib/libmysqlclient.20.dylib
lrwxr-xr-x 1 askar admin 42 Nov 13 10:48 /usr/local/lib/libmysqlclient.a -> ../Cellar/mysql/5.7.9/lib/libmysqlclient.a
lrwxr-xr-x 1 askar admin 46 Nov 13 10:48 /usr/local/lib/libmysqlclient.dylib -> ../Cellar/mysql/5.7.9/lib/libmysqlclient.dylib
lrwxr-xr-x 1 askar admin 37 Nov 13 10:48 /usr/local/lib/libmysqld.a -> ../Cellar/mysql/5.7.9/lib/libmysqld.a
lrwxr-xr-x 1 askar admin 44 Nov 13 10:48 /usr/local/lib/libmysqlservices.a -> ../Cellar/mysql/5.7.9/lib/libmysqlservices.a
$ ls -al /usr/local/Cellar/mysql/5.7.9/lib/
total 84392
drwxr-xr-x 9 askar admin 306 Nov 12 22:16 .
drwxr-xr-x 14 askar admin 476 Nov 13 10:48 ..
-r--r--r-- 1 askar admin 3780168 Nov 13 10:48 libmysqlclient.20.dylib
-r--r--r-- 1 askar admin 4280752 Nov 12 22:16 libmysqlclient.a
lrwxr-xr-x 1 askar admin 23 Nov 12 22:16 libmysqlclient.dylib -> libmysqlclient.20.dylib
-r--r--r-- 1 askar admin 35126528 Nov 12 22:16 libmysqld.a
-r--r--r-- 1 askar admin 9048 Nov 12 22:16 libmysqlservices.a
drwxr-xr-x 3 askar admin 102 Nov 13 10:48 pkgconfig
drwxr-xr-x 43 askar admin 1462 Nov 12 22:17 plugin
drwxr-xr-x 43 askar admin 1462 Nov 12 22:17 plugin
如您所见,我的问题是关于libmysqlclient.20.dylib
,版本是20
而不是18
,否则我会按照这里的解决方案操作。
我最近升级到了El Capitan,但不确定是否是这个原因。
更新:
感谢 @Rashmirathi 的提示,让我重新安装了gem。
只需要注意,在Gemfile中还需要指定如下内容:
gem 'mysql2', '~> 0.3.18'
否则,我会遇到错误:指定了'mysql2'作为数据库适配器,但是该 gem 未被加载。将
gem 'mysql2'
添加到您的Gemfile中(并确保其版本至少满足ActiveRecord的最低要求)。但最终我遇到了错误:
Mysql2::Error
您的密码已过期。您必须使用支持过期密码的客户端更改密码以登录。
通过重新设置密码解决了此问题:
SET PASSWORD=PASSWORD('your_password');