Rails 4 - Gem::LoadError: Specified 'mysql2' for database adapter, but the gem is not loaded

Question

In my gemfile I have:

gem \'mysql2\'

My database.yml is as follows:

default: &default
  adapter: mysql2
  database: <         


        

Answer 1

This issue was addressed here: https://github.com/brianmario/mysql2/issues/950

For Rails 4.x please pin the gem to mysql2 '~> 0.4.0' to avoid the 0.5.x upgrade.

Gemfile:

gem 'rails', '4.2.8'
gem 'mysql2', '~> 0.4.0'

Then run bundle update rails mysql2

I am currently using mysql v 8.0.11