Deep has_many through

rubyonrails-talk
#1

Hey everyone,

I tried searching for this and asking in #rubyonrails but got no answer.

Given:
class Aye; has_many :bee; end
class Bee; has_many :cees; end
class Cee; has_many :dees end

Is this possible?:
aye.dees

I know how that with has_many through you can get aye.cees but can it
go further than that?

While searching I came accross
http://wiki.rubyonrails.org/rails/pages/ThroughAssociations that
talked about it (but this was a wish):
class Manufacturer
  # using an array specifies the order in which the relationships occur.
  has_many :review_comments, :through => [:products, :reviews]
  # For that matter, we should be able to string together as many
relationships as we like.
  # For example, for intergalactic commerce, we might want to find out
which moons are associated with a given manufacturer.
  has_many :moons, :through => [:distributors, :space_stations,
:planets, :moons]
end

Thanks,
Ramon Tayag

#2

Hi,

you provide your own answer :slight_smile:

class Aye
  has_many :bees # plural !
  has_many :cees, :through => :bees # this specifies which class is
intermediary
end
class Bee
  has_many :cees
end
class Cee
  has_many :dees
end

And then you can use Aye.dees.

Elise