:through relationship

Ruby
1

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

2

Ganesh K. 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 G…

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

3

On Tue, Aug 12, 2008 at 2:09 AM, Ganesh K. [email protected]
wrote:

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

Why would you want to do this?

Todd

4

On Tuesday 12 August 2008 02:09:36 Ganesh K. wrote:

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

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.