An error occurred while installing mysql2 (0.3.11)

Question

I am a rails beginner,and I get a demo from https://github.com/rubytaiwan/jobs.ruby.tw

but when I try to run this demo,I got an error.

I run follow

bundle 

I got the error

An error occurred while installing mysql2 (0.3.11), and Bundler cannot continue. Make sure that `gem install mysql2 -v '0.3.11'` succeeds before bundling. 

but I can sure I have install mysql2

and the Gemfile is

source 'https://rubygems.org' ruby "1.9.3"  gem 'rails', '~> 3.2.12'  group :assets do   gem 'sass-rails',   '~> 3.2.3'   gem 'coffee-rails', '~> 3.2.1'    # See https://github.com/sstephenson/execjs#readme for more supported runtimes   gem 'therubyracer', :platforms => :ruby    gem 'uglifier', '>= 1.0.3' end  # Bundle edge Rails instead: # gem 'rails', :git => 'git://github.com/rails/rails.git'  gem 'devise', '~>2.1.3' gem 'mysql2'  gem "babosa" gem "rails_autolink"  gem "settingslogic" gem "seo_helper" gem 'open_graph_helper' gem 'google_plus_helper'  gem 'exception_notification'  gem "mobile-fu"  gem 'capistrano', :group => "development"  gem 'rake', :group => :test  group :development do   gem "capistrano"   gem "magic_encoding"   gem "annotate" end  group :test, :development do   gem "rspec"   gem "rspec-rails"   gem "simplecov"   gem "capybara" end 

then I try to comment this row:

gem 'mysql2' 

but I still got the error. so I do not know why this error occurs

Answer 1

try it

sudo apt-get install mysql-client libmysqlclient-dev 

Answer 2

@Ricardo Masao Shigeoka for the mac ,try first

brew install mysql, then

Put in your Gemfile gem 'mysql2', '0.3.18'

run bundle command in terminal.

This setup worked for me, I have El Captain OS, rails 4.2.6, hope this helps