ruby-on-rails – 在管理Gem Rails中设置管理员

我已经按照 guide关于如何在我的应用程序的Rails中安装Administrate gem,但我想添加的是只能由我设置管理员的功能.我已经遵循了 Gtihub的说明,但我仍然坚持如何将我的电子邮件或任何其他用户的电子邮件设置为管理员.这是我到目前为止添加的内容：

控制器/管理/ application_controller.rb

# All Administrate controllers inherit from this `Admin::ApplicationController`,# making it the ideal place to put authentication logic or other
# before_filters.
#
# If you want to add pagination or other controller-level concerns,# you're free to overwrite the RESTful controller actions.
class Admin::ApplicationController < Administrate::ApplicationController

  before_action :authenticate_user!
  before_action :authenticate_admin

  def authenticate_admin
    redirect_to '/',alert: 'Not authorized.' unless current_user && access_whitelist
  end

  private
    def access_whitelist
      current_user.try(:admin?) || current_user.try(:door_super?)
    end

  # Override this value to specify the number of elements to display at a time
  # on index pages. Defaults to 20.
  # def records_per_page
  #   params[:per_page] || 20
  # end
end

仪表板/ user_dashboard.rb

require "administrate/base_dashboard"

class UserDashboard < Administrate::BaseDashboard
  # ATTRIBUTE_TYPES
  # a hash that describes the type of each of the model's fields.
  #
  # Each different type represents an Administrate::Field object,# which determines how the attribute is displayed
  # on pages throughout the dashboard.
  ATTRIBUTE_TYPES = {
    posts: Field::HasMany,reviews: Field::HasMany,id: Field::Number,email: Field::String,encrypted_password: Field::String,reset_password_token: Field::String,reset_password_sent_at: Field::DateTime,remember_created_at: Field::DateTime,sign_in_count: Field::Number,current_sign_in_at: Field::DateTime,last_sign_in_at: Field::DateTime,current_sign_in_ip: Field::String,last_sign_in_ip: Field::String,created_at: Field::DateTime,updated_at: Field::DateTime,name: Field::String,password: PasswordField,password_confirmation: PasswordField

  }

  # COLLECTION_ATTRIBUTES
  # an array of attributes that will be displayed on the model's index page.
  #
  # By default,it's limited to four items to reduce clutter on index pages.
  # Feel free to add,remove,or rearrange items.
  COLLECTION_ATTRIBUTES = [
    :posts,:reviews,:id,:email,]

  # SHOW_PAGE_ATTRIBUTES
  # an array of attributes that will be displayed on the model's show page.
  SHOW_PAGE_ATTRIBUTES = ATTRIBUTE_TYPES.keys

  # FORM_ATTRIBUTES
  # an array of attributes that will be displayed
  # on the model's form (`new` and `edit`) pages.
  FORM_ATTRIBUTES = [
    :posts,:password,:password_confirmation,# :encrypted_password,# :reset_password_token,# :reset_password_sent_at,# :remember_created_at,# :sign_in_count,# :current_sign_in_at,# :last_sign_in_at,:current_sign_in_ip,:last_sign_in_ip,:name,]

  # Overwrite this method to customize how users are displayed
  # across all pages of the admin dashboard.
  #
  # def display_resource(user)
  #   "User ##{user.id}"
  # end
end

# All Administrate controllers inherit from this `Admin::ApplicationController`,# you're free to overwrite the RESTful controller actions.
module Admin
  class ApplicationController < Administrate::ApplicationController
    before_filter :authenticate_admin

    def authenticate_admin
      redirect_to root_url unless current_user.try(:admin)
    end

    # Override this value to specify the number of elements to display at a time
    # on index pages. Defaults to 20.
    # def records_per_page
    #   params[:per_page] || 20
    # end
  end
end