安装mysql2时发生错误（0.3.11）

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

我是一名初学者，我从https://github.com/ruby*/jobs.ruby.tw获得了一个演示。

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

但是当我尝试运行这个演示时，我收到了一个错误。

I run follow

我跟着跑

bundle

I got the error

我收到了错误

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

但我可以肯定我已经安装了mysql2

and the Gemfile is

和Gemfile是

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:

然后我尝试评论这一行：

gem 'mysql2'

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

但我还是得到了错误。所以我不知道为什么会出现这种错误

2 个解决方案

#1

try it

尝试一下

sudo apt-get install mysql-client libmysqlclient-dev

#2

@Ricardo Masao Shigeoka for the mac ,try first

@Ricardo Masao Shigeoka为mac，先试试

brew install mysql, then 
put in your Gemfile 
gem 'mysql 2', '0.3.18'
run bundle

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

这个设置对我有用，我有El Captain OS，rails 4.2.6，希望这有帮助

#1