devise定义多个authentication_keys

在你的model中加入

def self.find_for_database_authentication(warden_conditions)
    conditions = warden_conditions.dup
    if signin = conditions.delete(:signin)
      where(conditions.to_h).where(["lower(username) = :value OR lower(mobile) = :value", { :value => signin.downcase }]).first
    elsif conditions.has_key?(:username)|| conditions.has_key?(:mobile)
      where(conditions.to_h).first
    end
  end

　　

attr_accessor :signin

在application_controller.rb中加入　　　　

  before_action :configure_permitted_parametersod_name, if: :devise_controller?
 
  def configure_permitted_parametersod_name
    devise_parameter_sanitizer.permit(:sign_in) {|u| u.permit(:signin,:username, :mobile, :password, :remember_me)}
    devise_parameter_sanitizer.permit(:sign_up) {|u|
      u.permit(:signin,:username, :mobile, :password, :password_confirmation)}
  end

　最后更改devise.rb

  config.authentication_keys = [:signin]