Gem::LoadError for mysql2 gem, but it's already in Gemfile

Question

Gem::LoadError
Specified \'mysql2\' for database adapter, but the gem is not loaded.
Add `gem \'mysql2\'` to your Gemfile

This error occurred while

Answer 1

I solved the problem, installing the libmysqlclient-dev. sudo aptitude install libmysqlclient-dev and later run bundle.