为新的ruby应用安装mysql数据库时出错

Question

I am a total newbie, trying to setup all the components needed to be learn RoR but while installing mysql I am getting this message in the terminal: An error occurred while installing mysql2 (0.4.5), and Bundler cannot continue. Make sure that gem install mysql2 -v '0.4.5' succeeds before bundling. run bundle exec spring binstub --all bundler: command not found: spring Install missing gem executables with `bundle install

Anyone know what should I do? Thanks

Answer 1

You need to install mysql2 on your system before you can install the gem. On OSX you can do this via homebrew.

To install homebrew:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

To make sure homebrew is properly installed:

brew doctor

To install mysql:

brew install mysql

Then try your gem installation again and it should work:

gem install mysql2 -v '0.4.5'

Answer 2

You need to install dependent libraries mysql-client and libmysqlclient-dev Command for Ubuntu machine

sudo apt-get install mysql-client

sudo apt-get install libmysqlclient-dev

Just to make sure, you might also want to try removing your Gemfile.lock and then re-running bundle install once all dependent libraries get installed.