How do I install the Rails MySQL adapter?

Question

There\'s not much more to my question than that. gem install mysql doesn\'t work and I haven\'t found anything by Googling.

When I try gem install

Answer 1

I assume you are working with Rails.

In your Gemfile:

gem 'mysql2'

Then in your terminal:

bundle

Answer 2

I'll just leave this here:

I ran into a similar problem, then realized I couldn't install the mysql2 gem without having MySQL installed on my development machine (even though I'm only using the mysql2 gem to connect to a remote MySQL server).

::forehead slap::

brew install mysql

then, in my Gemfile:

gem 'mysql2', '~> 0.3.11'

followed by a quick

bundle install

Success!

Answer 3

In 2013, Using Ubuntu 12.04, this worked for me:

sudo apt-get install mysql-client libmysqlclient-dev

bundle install

Answer 4

It looks like you still need to install MySQL's development libraries. These are required for the gem to build successfully on your system.

[Edit] Seems the RoR Wiki is no longer available. But, Ubuntu has offered their own walkthrough which suggests:

sudo apt-get install mysql-server mysql-client
sudo apt-get install libmysql-ruby libmysqlclient-dev
sudo gem install mysql

See http://wiki.rubyonrails.org/database-support/mysql#installation for more detail.

Example: Ubuntu

sudo apt-get install mysql-server mysql-server-5.0 libmysqlclient15off \
    libmysqlclient15-dev mysql-client-5.0 mysql-common

sudo apt-get install libmysql++-dev

sudo gem install mysql

Answer 5

If you are running Rails 3 you should use the mysql2 gem. You can install it with:

gem install mysql2

You will need to first install MySQL and any development headers. This will vary across different operating systems. On Ubuntu, you can run:

aptitude install mysql-server 
aptitude install mysql-client
aptitude install mysql-common
aptitude install libmysql-ruby
aptitude install libmysqlclient-dev

If you are creating a new project, use:

rails new sample --database=mysql
cd sample
bundle install

For more details, check out the project repository.