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Trying to start a new Rails 3 beta 4 app with mysql…. Running OS X Snow Leopard. WIth previous versions of Rails I have no problem with MySQL. But now when I start the Rails 3 app I get the following error when I click “About Your Application Environment” on the Rails index.html startup screen:
undefined method `init’ for Mysql:Class
Change your Gemfile to use ‘mysql2’, it’s a more modern driver and has nicer features as other people have mentioned.
New Rails applications use the mysql2 gem by default.