gem devise

gem devise
   # for devise omniauth on user scope
    通路的是admin/sign_in ,根據path 來确定前面的路由值
    devise_for :users, path: "admin", controllers: {
      omniauth_callbacks: "omniauth_callbacks"
    }
    devise_scope :user do
      get 'mobile/sign_in', to: 'mobile/sessions#new', as: :new_user_session
      delete 'mobile/sign_out', to: 'mobile/sessions#destroy', as: :destroy_user_session
    end

    #devise預設使用email進行登陸，如果使用其他字段修改model中的：authentication_keys

     devise :database_authenticatable, :registerable,
            :recoverable, :rememberable, :trackable, :validatable,
            :authentication_keys => [:login]
     attr_accessor :login
    # 實作login的讀寫方法，此處是email和使用者名登陸即可
      def login=(login)
        @login = login
      end

      def login
        @login || self.email || self.name
      end
    # 還需注意overwrite devise  self.find_first_by_auth_conditions
      def self.find_first_by_auth_conditions(warden_conditions)
        conditions = warden_conditions.dup
        if login = conditions.delete(:login)
          where(conditions).where(["lower(phone) = :value OR lower(email) = :value", { :value => login.downcase }]).first
        else
          if conditions[:phone].nil?
            where(conditions).first
          else
            where(phone: conditions[:phone]).first
          end
        end
      end
    # 很多時候不同的角色登陸成功後展現的頁面不同（預設傳回root_path）
    #此時可重寫 after_sign_in_path_for和 after_sign_out_path_for 方法
      def after_sign_out_path_for(scope)
        new_admin_stores_path
      end
      def after_sign_in_path_for(scope)
        root_path
      end
    # 某些路由通路（controller中）登陸後才可進行操作，此時可使用devise提供的
      before_action :authenticate_user! # 必須登陸後