On Oct 22, 2:40 pm, Evan <[EMAIL PROTECTED]> wrote:
> Daniel,
>
> I did not notice that warning about validates_presence_of before.
> Thanks for bringing it to my attention. Your thought process helped me
> understand better what is going on.
>
> Evan
Take a look at a more recent post from Mark R J:
http://www.ruby-forum.com/topic/168650
He shows how you can use validates_presence_of with assocations when
building a new object.
ie
u.books.build(:title => 'The Comedy of Errors', :author => u)
where u is an unsaved User object (used as an author). I can't
remember your example exactly, but that might work for you with your
current validations. The way the (online) docs are worded, though,
suggests that the AR-people intended it to be used more for foreign
key fields than the associations based on them.
The callback before_destroy I mentioned was just a thought about how
you might stop an olive oil source from being 'destroyed' ('delete'
won't invoke callbacks) if it happens to be the only source for an
olive oil object. Anyway, you have a bunch of validations and
callbacks to use to achieve whatever you need to do.
--
Daniel Bush
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