Fix error : Specified 'mysql2' for database adapter, but the gem is not loaded

Author: Nicolas Rodriguez

Appraisals

@@ -8,5 +8,6 @@ RAILS_VERSIONS = %w(
 RAILS_VERSIONS.each do |version|
   appraise "rails_#{version}" do
     gem 'rails', version
+    gem 'mysql2', '~> 0.3.18' if version == '4.1.15'
   end
 end

gemfiles/rails_4.1.15.gemfile

@@ -3,6 +3,7 @@
 source "https://rubygems.org"
 
 gem "rails", "4.1.15"
+gem "mysql2", "~> 0.3.18"
 
 group :test do
   gem "codeclimate-test-reporter", "~> 1.0.0"