在Rails4中，我们有很强的参数，所以请

In Rails4 we have strong parameters so please

将以下行添加到您的application_controller.rb中

Add following line to your application_controller.rb

before_filter :configure_devise_params, if: :devise_controller?
  def configure_devise_params
    devise_parameter_sanitizer.for(:sign_up) do |u|
      u.permit(:first_name, :last_name, :gender, :email, :password, :password_confirmation)
    end
  end