Arel Deprecation Warning when running rake db:create

Question

I'm trying to create an app in Rails 3.1 with mysql2 v 0.2.6. When running rake db:create, I get the following error:

DEPRECATION WARNING: Arel::Visitors::VISITORS is deprecated and will be removed. 
Database adatpers should define a visitor_for method which returns the appropriate 
visitor for the database. For example, MysqlAdapter.visitor_for(pool) returns 
Arel::Visitors::MySQL.new(pool). (called from mon_synchronize at 
c:/Ruby192/lib/ruby/1.9.1/monitor.rb:201)

I can access the MySQL monitor, so the gem appears to be installed correctly. What else could be going on here?

Thanks!

Answer 1

Try updating your msql gem.

In ./Gemfile

gem require 'mysql2', '~> 0.3.6'

bundle update mysql2