Forum: Ruby on Rails Update join_table attributes

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77a7983d6364120e55b7476d0f6243a6?d=identicon&s=25 Dan Grigsby (dcgrigsby)
on 2006-01-25 03:41
I have two ActiveRecord classes that point at each other with a
"has_and_belongs_to_many" (habtm) relationship using a join table.  The
join
table has an a few additional columns besides the _id columns.

For those of you with the Agile Web Dev w/ Rails book, it's exactly the
same
setup as the articles<->articles_users<->users example on p240.

The habtm relationship is setup fine.  I can see the linked data in
instances of the objects.

The problem, though, is that I can't update the extra columns in the
join
table using update_attributes.  This is a well documented shortcoming,
and
the solution everyone talks about is to override the update_attributes
code.

The code (see the comments @ http://tinyurl.com/ey5qd) starts like so:

module ActiveRecord
  module Associations
    class HasAndBelongsToManyAssociation
      def update_attributes(record, join_attributes = {})

The problem is, and here is why I'm writing, that this code isn't called
when you call update_attributes.  In fact, if you go and edit the file
that
defines HasAndBelongsToManyAssociations and you put in a method "foo"
and
call it, it won't be called either.

Would be grateful for any assistance.
2073c7e0e7d2311727b680a887a375be?d=identicon&s=25 Leon Leslie (Guest)
on 2006-01-25 04:13
(Received via mailing list)
Why not use edge rails :though?
2073c7e0e7d2311727b680a887a375be?d=identicon&s=25 Leon Leslie (Guest)
on 2006-01-25 04:19
(Received via mailing list)
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