ruby-on-rails – Rails 3覆盖Devise会话控制器

class SessionsController < Devise::SessionsController

  # GET /resource/sign_in
  def new
    resource = build_resource
    clean_up_passwords(resource)
    respond_with_navigational(resource,stub_options(resource)){ render_with_scope :new }
  end

end

想法？

编辑
如答案所示,我还需要改变路线.另外,我还需要复制视图.这里有更好的解释
http://presentations.royvandewater.com/authentication-with-devise.html#8

我的自定义策略：

devise.rb
config.warden do |manager|
  manager.strategies.add(:custom_strategy) do
    def authenticate!
      ... authenticate against 3rd party API...
      if res.body =~ /success/
        u = User.find_or_initialize_by_email(params[:user][:email])
        if u.new_record?
          u.save
        end
      success!(u)
    end
  end
end