rubyonrailsin

Hi Max,

Have you tried:

@question = Question.create(attributes)
@grading = @question.gradings.build(more_attrs)

Using create instead of new will save the Object to the DB first, and
hence:

@question[:id] will/should/may not be nil when building your gradings.

I'm six months in to Rails, don't use build, and haven't needed to use
any validation yet - am currently extending the generator for my
current and future Apps, so I have held fire on my first app until I
get this completed, but if your only issue is that the FK question_id
requires @question[:id] to exist, then unless I'm mistaken(which I
could be), using create over new should work.......

HTH

Paul

On Mar 13, 3:54 pm, Max Williams <li...@ruby-forum.com> wrote:
> Hi. I'm using rails 2.3.4 and have this association between two of my
> models.
>
> Question
>   has_many :gradings
>
> Grading
>   belongs_to :question
>
> Grading has this validation:
>   validates_presence_of :question_id
>
> And this validation test is stopping me from doingg this, which i would
> normally expect to work
>
> @question = Question.new(attributes)
> @grading = @question.gradings.build(more_attributes)
> @question.save #fails because grading has no question_id
>
> Now, i thought that this would work ok because (in my understanding) the
> question is saved and then it saves it's built associated objects.  How
> can i ensure this will work?  Do i need to drop the validation?  I'd
> rather not if possible.
>
> Grateful for any advice - max
> --
> Posted viahttp://www.ruby-forum.com/.

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