rails-mysql rake db:create - 未加载库未找到libmysqlclient.20.dylib图像

Question

原因:找不到图像 - /Users/mdurrant/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-14/2.1.0-static/mysql2-0.3.20/mysql2/mysql2.bundle

我们的应用程序需要mysql 5.6版,似乎工作正常 -

$ mysql -uroot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.27 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> 

但是,当我尝试从rails创建数据库时,我得到:

$ rake db:create
rake aborted!
LoadError: dlopen(/Users/mdurrant/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-14/2.1.0-static/mysql2-0.3.20/mysql2/mysql2.bundle, 9): Library not loaded: /usr/local/opt/mysql/lib/libmysqlclient.20.dylib
  Referenced from: /Users/mdurrant/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-14/2.1.0-static/mysql2-0.3.20/mysql2/mysql2.bundle
  Reason: image not found - /Users/mdurrant/.rvm/gems/ruby-2.1.5/extensions/x86_64-darwin-14/2.1.0-static/mysql2-0.3.20/mysql2/mysql2.bundle
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `block in require'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:236:in `load_dependency'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/mysql2-0.3.20/lib/mysql2.rb:31:in `<top (required)>'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
/Users/mdurrant/eq/lynx/config/application.rb:10:in `<top (required)>'
/Users/mdurrant/eq/lynx/Rakefile:10:in `require'
/Users/mdurrant/eq/lynx/Rakefile:10:in `<top (required)>'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `eval'
/Users/mdurrant/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `<main>'
(See full trace by running task with --trace)
14:18:13 mdurrant EQ-267 /Users/mdurrant/eq/lynx master
$ 

Answer 1

修复是为了

gem uninstall mysql2

然后再用它重新安装

bundle  # gem install mysql2 would also work

这将重新编译并解析安装了mysql 5.7.9时遗留的引用.