安装mysql2 (0.3.11)时出错

Question

我是rails初学者，我从https://github.com/rubytaiwan/jobs.ruby.tw得到了一个演示

但是当我尝试运行这个演示时，我得到了一个错误。

我跟着跑

bundle

我得到了错误

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.

但是我可以确定我已经安装了mysql2

而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

然后我试着评论一下这一行：

gem 'mysql2'

但我还是得到了错误。所以我不知道为什么会发生这个错误

Answer 1

试试看

sudo apt-get install mysql-client libmysqlclient-dev

Answer 2

@Ricardo Masao Shigeoka for the mac，先试一下

brew install mysql，然后

放入你的Gemfile gem 'mysql2', '0.3.18'

在终端中运行bundle命令。

这个设置对我很有效，我有El舰长操作系统，rails 4.2.6，希望这对我有帮助

Answer 3

试试这个

gem 'mysql2', '~> 0.4.10'