Class: Ability
Overview
Canard provides a CanCan Ability class for you. The Canard Ability class looks for and applies abilities for the object passed when a new Ability instance is initialized.
If the passed object has a reference to user the user is set to that. Otherwise the passed object is assumed to be the user. This gives the flexibility to have a seperate model for authorization from the model used to authenticate the user.
Abilities are applied in the order they are set with the acts_as_user method for example for the User model
class User < ActiveRecord::Base
acts_as_user :roles => :manager, :admin
end
the abilities would be applied in the order: users, managers, admins with each subsequent set of abilities building on or overriding the existing abilities.
If there is no object passed to the Ability.new method a guest ability is created and Canard will look for a guests.rb amongst the ability definitions and give the guest those abilities.
Instance Attribute Summary collapse
-
#user ⇒ Object
readonly
Returns the value of attribute user.
Instance Method Summary collapse
-
#initialize(object = nil) ⇒ Ability
constructor
A new instance of Ability.
Constructor Details
#initialize(object = nil) ⇒ Ability
Returns a new instance of Ability.
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# File 'lib/ability.rb', line 32 def initialize(object=nil) # If object has a user attribute set the user from it otherwise assume # this is the user. @user = object.respond_to?(:user) ? object.user : object if @user # Add the base user abilities. append_abilities @user.class.name.underscore.to_sym else # If user not set then lets create a guest @user = Object.new append_abilities :guest end # If user has roles get those abilities if @user.respond_to?(:roles) # Add roles on top of the base user abilities @user.roles.each { |role| append_abilities(role) } end end |
Instance Attribute Details
#user ⇒ Object (readonly)
Returns the value of attribute user.
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# File 'lib/ability.rb', line 30 def user @user end |