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last_post_id
2006 Jun 21
6
Sort table by child row property?
I''m building a simple forum system which features a topics and a posts
table. The topic model has a has_many association with the post model,
i.e.:
class Topic < ActiveRecord::Base {
has_many :posts
}
class Post < ActiveRecord:Base {
belongs_to :topic, :dependent => true
}
Now, I wish to sort the topics by the created_at property of the last
post, but I can''t