Load rake tasks from gems in rails 2.3

Rakefile

# Rails 2.3 doesn't automatically load rake tasks from required gems
# Add the following code to your app's Rakefile to fix that
gem_tasks = []
Gem.loaded_specs.each do |name, spec|
  next if %w{rake rails bundler activesupport rack actionpack actionmailer activerecord activeresource mysql2}.include?(name)
  spec.load_paths.each do |load_path|
    gem_tasks +=
      Dir.glob("#{load_path}/**/tasks/*.rake")
  end
end

gem_tasks.map {|f| load f }