ruby on rails - Best ability based authorization -


i have rails 3 app, use cancan authorization, looking suits needs better. authorizations not role based, more situational.

the application managing daily dinner clubs @ college/dorm, people takes turn making dinner rest. chef have therefore more permissions dinner club responsible (like changing menu), , participant have more permissions (like adding guests) 1 not participating in single dinner club.

what need therefore authorization system depends on relationship between user , dinner club or kitchen (a kitchen have many dinner clubs), not users role.

if helps, current cancan abilities here (as see pretty complex)

# in ability.rb  def initialize(user)   # edit (like changing time or menu) dinner club   can :edit, dinnerclub |dinner_club|     dinner_club.is_chef?(user) &&     !dinner_club.canceled?   end    # open or close dinner club   can [:open, :close], dinnerclub |dinner_club|     !dinner_club.passed? &&     dinner_club.is_chef?(user)   end    # cancel or resume dinner club   can [:cancel, :resume], dinnerclub |dinner_club|     !dinner_club.passed? &&     dinner_club.is_chef?(user)   end    # register or unregister @ specific dinner club   can [:register, :unregister], dinnerclub |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 dinner club   can [:add_guests], dinnerclub |dinner_club|     dinner_club.open? &&     (dinner_club.kitchen_id == user.kitchen_id || dinner_club.kitchen.open_registrations?) &&     dinner_club.registered?(user)   end    # take dinner club use if dinner club canceled   can [:take], dinnerclub |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 new dinner club   can [:create], dinnerclub |dinner_club|     (dinner_club.kitchen_id == user.kitchen_id || dinner_club.kitchen.open_registrations?)   end    # comment on existing dinner clubs   can [:comment], dinnerclub |dinner_club|     dinner_club.registered?(user)   end    # can see dinner clubs kitchen   can :read, kitchen |kitchen|     (kitchen.id == user.kitchen_id || kitchen.open_registrations?)   end    # can manage kitchen, changing name , configuration options   can :manage, kitchen, admin_id: user.id end

you can rewrite of these blocks in cancan make them lot less complex.

can :edit, dinnerclub, cancelled: false, chef_id: user.id  # open or close dinner club can [:open, :close], dinnerclub, passed: false, chef_id: user.id  # take dinner club use if dinner club 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

this assuming cancelled? , passed? methods derived boolean attributes on dinnerclub model , is_chef? method checks chef_id. illustrates idea.

cancan used define abilities based on resources, go that.


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