I just installed Rails 3 on my iMac, which is running Snow Leopard. I’m trying to build a web hosting website/billing system/management system. I configured the app to use MySQL in /config/database.yml like so:
development: adapter: mysql encoding: utf8 database: hosting_development username: root password: host: 127.0.0.1
I had to do this because I created the Rails app without specifying that I didn’t want sqlite3. I then ran rake db:create and I got this error:
rake aborted! uninitialized constant Mysql
I found an article online which advised to do the follow, with the exception of the path to mysql_config. I’m using MacPorts for most of the packages in my development environment.
$ sudo gem uninstall mysql $ sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/opt/local/lib/mysql5/bin/mysql_config
I then modified the Gemfile in my app with the following. I think this might have been what was needed most, not the gem reinstallation. I forgot to do this until right before it was fixed.
# gem 'sqlite3' gem 'mysql'