Just do:
gem 'mysql2', '~> 0.3.18'
this gem works with rails version 4.x.x
if install gem 'mysql2', '~> 0.4.0'
it produces gem load error and causes compatibility issues
Just do:
gem 'mysql2', '~> 0.3.18'
this gem works with rails version 4.x.x
if install gem 'mysql2', '~> 0.4.0'
it produces gem load error and causes compatibility issues