运行Brew Update之后，mysql已更新，所有带有mysql2的Rails应用程序均无法正常工作

Question

I have been on this issue for some time now. It happened after I ran brew upgrade. It installed mysql version 5.7.9.

rake aborted!
LoadError: dlopen(/Users/MyName/.rvm/gems/ruby-2.2.3@AppName/extensions/x86_64-darwin-14/2.2.0-static/mysql2-0.3.20/mysql2/mysql2.bundle, 9): Library not loaded: /usr/local/opt/mysql/lib/libmysqlclient.18.dylib
  Referenced from: /Users/MyName/.rvm/gems/ruby-2.2.3@AppName/extensions/x86_64-darwin-14/2.2.0-static/mysql2-0.3.20/mysql2/mysql2.bundle
  Reason: image not found - /Users/MyName/.rvm/gems/ruby-2.2.3@AppName/extensions/x86_64-darwin-14/2.2.0-static/mysql2-0.3.20/mysql2/mysql2.bundle

but when I cd into the directory

opt/mysql/lib  master ✔                                                                                                                                                                             3h36m
▶ ls
libmysqlclient.18.dylib libmysqlclient.20.dylib libmysqlclient.a        libmysqlclient.dylib    libmysqld.a             libmysqlservices.a      pkgconfig               plugin

I tried all the symlink answers on this forum but still no luck. I am running El Capitan. I also did locate and this was the result:

opt/mysql/lib  master ✔                                                                                                                                                                             3h36m
▶ locate libmysqlclient.18.dylib
/usr/local/Cellar/mysql/5.6.27/lib/libmysqlclient.18.dylib
/usr/local/lib/libmysqlclient.18.dylib

The gem mysql2 is not working for any of my rails applications. Everytime I run rails s, or any rake task it automatically fails. Running rails s gives this error:

▶ rails s
bin/rails:6: warning: already initialized constant APP_PATH

Any help is GREATLY appreciated. Please and thank you.

Answer 1

so I wanted to make sure this was there for others with this problem. Wajid Kagzi 's comment was the fix for my issue as well.

I fixed it by reinstalling mysql from brew, then uninstalled and reinstalled the mysql2 gem from each of my versions of ruby.