基于最佳能力的授权

Question

我有一个Rails 3应用程序，我使用CanCan进行授权，但我在寻找更适合我需求的东西。我的授权不是基于角色的，而是更加情景化的。

该应用程序用于管理大学/宿舍的日常晚餐俱乐部，在那里人们轮流为其余的晚餐做饭。因此，厨师对他负责的晚餐俱乐部拥有更多权限（如更改菜单），并且参与者拥有更多权限（如添加客人），而不是参与该单一晚餐俱乐部的人。

因此，我需要的是一些依赖于用户和晚餐俱乐部或厨房（厨房里有很多晚餐俱乐部）之间关系的授权系统，而不是用户角色。

如果有帮助，是我目前的康康舞能力在这里（当你看到他们是非常复杂的）

# In ability.rb 

def initialize(user) 
    # edit (like changing time or menu) for a dinner club 
    can :edit, DinnerClub do |dinner_club| 
    dinner_club.is_chef?(user) && 
    !dinner_club.canceled? 
    end 

    # open or close a dinner club 
    can [:open, :close], DinnerClub do |dinner_club| 
    !dinner_club.passed? && 
    dinner_club.is_chef?(user) 
    end 

    # cancel or resume a dinner club 
    can [:cancel, :resume], DinnerClub do |dinner_club| 
    !dinner_club.passed? && 
    dinner_club.is_chef?(user) 
    end 

    # register or unregister for at specific dinner club 
    can [:register, :unregister], DinnerClub do |dinner_club| 
    dinner_club.open? && 
    (dinner_club.kitchen_id == user.kitchen_id || dinner_club.kitchen.open_registrations?) && 
    !dinner_club.is_chef?(user) 
    end 

    # add guests to a dinner club 
    can [:add_guests], DinnerClub do |dinner_club| 
    dinner_club.open? && 
    (dinner_club.kitchen_id == user.kitchen_id || dinner_club.kitchen.open_registrations?) && 
    dinner_club.registered?(user) 
    end 

    # take the dinner club from another use if the dinner club is canceled 
    can [:take], DinnerClub do |dinner_club| 
    dinner_club.canceled? && 
    (dinner_club.kitchen_id == user.kitchen_id || dinner_club.kitchen.open_registrations?) && 
    !dinner_club.passed? && 
    !dinner_club.is_chef?(user) 
    end 

    # create a new dinner club 
    can [:create], DinnerClub do |dinner_club| 
    (dinner_club.kitchen_id == user.kitchen_id || dinner_club.kitchen.open_registrations?) 
    end 

    # comment on existing dinner clubs 
    can [:comment], DinnerClub do |dinner_club| 
    dinner_club.registered?(user) 
    end 

    # can see dinner clubs for this kitchen 
    can :read, Kitchen do |kitchen| 
    (kitchen.id == user.kitchen_id || kitchen.open_registrations?) 
    end 

    # can manage the kitchen, like changing name and configuration options 
    can :manage, Kitchen, admin_id: user.id 
end 

Answer 1

您可以重写大部分在惨惨这些块，使他们少了很多复杂。

can :edit, DinnerClub, cancelled: false, chef_id: user.id 

# open or close a dinner club 
can [:open, :close], DinnerClub, passed: false, chef_id: user.id 

# take the dinner club from another use if the dinner club is canceled 
can [:take], DinnerClub, cancelled: true, kitchen_id: user.kitched_id, passed: false 
can [:take], DinnerClub, cancelled: true, kitchen: { open_registrations: true }, passed: false 
cannnot [:take], DinnerClub, chef_id: user.id 

这是假设的cancelled?和passed?方法从在DinnerClub模型布尔属性推导并且该is_chef?方法检查一个chef_id。但它说明了这个想法。

CanCan主要用于定义基于资源的能力，所以我会这样做。