:through relationship

ruby-talk
1

Hi,
  Is it possible to use :through in has_and_belongs _to_many
relationship

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Posted via http://www.ruby-forum.com/.

2

Ganesh Kumar wrote:

  Is it possible to use :through in has_and_belongs _to_many
relationship

I guess it's my turn to apply the rubber stamp!

Ruby is a language. Rails, and ActiveRecord, are frameworks written in that language. The best forum for questions about them is the Ruby-on-Rails-talk group at Google Groups.

And there are those (on that newsgroup) who never use habtm because it gets in the way the instant you think to add a property to the intermediate table. I suspect :through only works thru has_many - not even belongs_to.

If you only need to access the through item, just write a little accessor for it:

   def bars
     foos.map(&:bars).flatten
   end

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   Phlip

3

Why would you want to do this?

Todd

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On Tue, Aug 12, 2008 at 2:09 AM, Ganesh Kumar <gani_chinta@yahoo.com> wrote:

Hi,
Is it possible to use :through in has_and_belongs _to_many
relationship

4

This isn't a Rails forum, but I'll bite anyway.

I suspect the right way is to simply use "has_many :through" _instead_ of the
habtm relationship. If you're needing to get through to the other side, you
can (probably) do that, too -- at least, I remember this working, the last
time I tried:

has_many :foos
has_many :bars, :through => :foos
has_many :others, :through => :bars

It's been awhile, though, so I'm not sure.

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On Tuesday 12 August 2008 02:09:36 Ganesh Kumar wrote:

Hi,
  Is it possible to use :through in has_and_belongs _to_many
relationship