On Apr 29, 12:43 am, Mario Gr
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> I was wondering if you could help me with a quick question on writting
> polymorphic join associations.
>
> I have User has_many Favorite(polymorphic). The user has favorite
> Posts and Favorite Comments.
>
> I want set up a direct association on User to Post
>
> class User < ActiveRecord::Base
> has_many :favorite_posts , :as => :favoriteable, :source => :posts
> end
>
> I''m not quite sure how to describe that :favorite_posts
association.
> Right now, I''m just using a little method to bridge the gap, but
would
> prefer something more conventional, if possible.
>
> Any help would be appreciated!
>
Here''s what I''m gathering that your models look like:
class User < AR::Base
has_many :favorites
end
class Favorite < AR::Base
belongs_to :user
belongs_to :favoritable, :polymorphic => true
end
class Post < AR::Base
has_many :favorites, :as => :favoritable
end
In that case, you''re looking for the :source_type option to has_many
(on User):
has_many :favorite_posts, :through => :favorites, :source
=> :favoritable, :source_type => ''Post''
--Matt Jones
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