无法允许Devise使用params

Question

升级到设计3.5后，我在控制器中有这个：

class MyController < Devise::RegistrationsController
  before_filter :configure_permitted_parameters

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:user) { |u|
      u.permit(:email, :password, :password_confirmation)
    }
  end

我仍然有错误“电子邮件不能为空，密码不能为空”等。在“params”的帖子中我有：

> params
=> {"utf8"=>"✓",
 "authenticity_token"=>"fdsfdsfd",
 "user"=>
  {"first_name"=>"fdsf",
   "last_name"=>"fdsf",
   "email"=>"something@gmail.com",
   "password"=>"fdsfdsfdsfds",
   "var1"=>{"var11"=>"33243", "var12"=>"7"},
   "var2"=>{"var21"=>"fdsfds", "var22"=>"3243243",},
   "var3"=>"fdsfsfds",
   "accept_terms"=>"1"},
 "commit"=>"Sign Up",
 "controller"=>"my",
 "action"=>"create"}

为什么错误呢？