Hi
As subscriber model is polymorphic and as you
are referring “subscribers.appointments”
It means, you are having following association in appointment model.
class Appointment < ActiveRecord::Base
has_many :subscribers, :as => : subscribable
end
Here goes solution
class User < ActiveRecord::Base
has_many :subscribers
def appointments
self. subscribers.of_appointment_type.collect { |s| s.subscribable }
end
end
defined “of_appointment_type” as a named_scope in Subscriber model
class Subscriber < ActiveRecord::Base
belongs_to :user
belongs_to :subscribable, :polymorphic => true
named_scope :of_appointment_type, :conditions => [ "subscribable_type =
? ",
“Appointment”]
end
On Mon, Nov 2, 2009 at 1:51 AM, theLemcke [email protected]
wrote:
I am trying to build a shared-appointment system, where users can
subscribe to appointments and be updated whenever changes are made to
them. I have three objects in this system, appointments, users, and
subscribers. Subscribers are a polymorphic object like so:
class Subscriber < ActiveRecord::Base
belongs_to :user
belongs_to :subscribable, :polymorphic => true
It means you have subscribable_id and subscribable_type fields in table
end
The tricky part is that users already own appointments, so I can’t
create a simple users.appointments association. I can find users by
calling appointment.subscribers, but I need help getting the reverse
to work (users.subscribers.appointments) I can use named_scope to
only grab appointment subscriber objects, but how can I make it
automatically link to the appointments, not the subscriber objects?
Sandip
www.funonrails.com