Rails - Dec 2008 - Correct way to build an AR object with multiple associations?

I have a Book resource that belongs both to a User and to an Isbn.
What is the recommended way of building a new Book record in this type
of situation?

class Book < ActiveRecord::Base
  belongs_to :user
  belongs_to :isbn
end

Currently I''m doing the following:

@isbn = Isbn.find(...)
book = @isbn.books.build(...)
book.user_id = @user.id
book.save

Is this the way it''s supposed to be done?  I know that it''s
preferred
to interact with dependent resources through their associations. So
adding the user_id manually seems a bit clunky to me.  But I''m not
sure how else to do it!

Thanks in advance.
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Lisa Klein wrote:
> book.user_id = @user.id
>
> Is this the way it''s supposed to be done?  I know that
it''s preferred
> to interact with dependent resources through their associations. So
> adding the user_id manually seems a bit clunky to me.  But I''m not
>   
Do

book.user = @user

instead then (ultimately it''s the same thing obviously).



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Oooh, that clarified a few things.  Thanks Andrew!

On Dec 18, 4:58 am, Andrew Porter
<a...-OV3k8GMR8cdg9hUCZPvPmw@public.gmane.org>
wrote:
> Lisa Klein wrote:
> > book.user_id = @user.id
>
> > Is this the way it''s supposed to be done?  I know that
it''s preferred
> > to interact with dependent resources through their associations. So
> > adding the user_id manually seems a bit clunky to me.  But
I''m not
>
> Do
>
> book.user = @user
>
> instead then (ultimately it''s the same thing obviously).
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