@H_502_5@解决方法
来自rails4 readme on devise：
https://github.com/plataformatec/devise/tree/rails4#strong-parameters
class ApplicationController < ActionController::Base
before_filter :configure_permitted_parameters,if: :devise_controller?
protected
def configure_permitted_parameters
devise_parameter_sanitizer.for(:sign_in) { |u| u.permit(:login,:email) }
end
end