未定义方法的作用？为用户 [英] Undefined method 'role?' for User

问题描述

我有以下能力模型：



  class Ability 
包括CanCan :: Ability 
 
 def初始化（用户）
用户|| = User.new＃guest用户，未登录
 
如果用户。角色？ ==：admin 
 can：manage，：all 
 else 
 can：read，：all 
 end 
 if user.role ==default
可以：创建，主屏幕
结束
可以：销毁，主屏幕do | homescreen | 
 homescreen.try（：user）==用户
结束
结束
结束
  

我有以下用户模型：



  class User< ActiveRecord :: Base 
 devise：database_authenticatable，：可注册的，
：可恢复的，：可记录的，：可跟踪的，：validatable 
 
 before_create：setup_default_role_for_new_users 
 
 
 attr_accessible：email，：password，：password_confirmation，：remember_me 
 has_many：homescreens 
 
 ROLES =％w [admin default] 
 private 
 def setup_default_role_for_new_users 
如果self.role.blank？ 
 self.role =默认
结束
结束
结束
  

当我在本地机器上运行它时，它工作正常。

但是，当我部署到heroku时，出现以下错误：

  GET URL.herokuapp.com dyno = web.1 queue = 0 wait = 0ms service = 158ms status = 500 bytes = 643 
 app / models / ability.rb：7：在`initialize'
 NoMethodError（未定义方法角色为＃< User：0x00000003b56050>）：
 
 cache：[GET / ] miss 
 
在2012-03-19 16:14:38 +0000 
 
处启动了GET/for my-ipaddress NoMethodError（未定义方法角色为＃ < User：0x00000003df5d88>）：
 app / models / ability.rb：7：in`initialize'
 
 cache：[GET /] miss 
  
 
   
 >我用以下命令重新启动了heroku：
 
 
 
  heroku restart&& heroku ps：重新启动 
 
 
 
然后它正常工作。
 
I have the following abilities model:
class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new # guest user, not logged in.

    if user.role? == :admin
      can :manage, :all
    else
      can :read, :all
      end
      if user.role == "default"
        can :create, Homescreen
        end
        can :destroy, Homescreen do |homescreen|
          homescreen.try(:user) == user
      end
  end
end
And I have the following users model:
class User < ActiveRecord::Base
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  before_create :setup_default_role_for_new_users


  attr_accessible :email, :password, :password_confirmation, :remember_me
  has_many :homescreens

  ROLES =%w[admin default]
  private
  def setup_default_role_for_new_users
    if self.role.blank?
      self.role = "default"
    end
  end
end
When I run it on my local machine, it works fine.

However, when I deploy to heroku, I get the following error:
GET URL.herokuapp.com dyno=web.1 queue=0 wait=0ms service=158ms status=500 bytes=643
   app/models/ability.rb:7:in `initialize'
 NoMethodError (undefined method `role?' for #<User:0x00000003b56050>):

 cache: [GET /] miss

 Started GET "/" for my-ipaddress at 2012-03-19 16:14:38 +0000

 NoMethodError (undefined method `role?' for #<User:0x00000003df5d88>):
   app/models/ability.rb:7:in `initialize'

 cache: [GET /] miss
What am I doing wrong?
解决方案
I restarted heroku with the following command:

heroku restart && heroku ps:restart

It then worked fine.

                        
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