Re: update a field of a related table on form save

Hi Brad, my response is inline

On 30 Jul 2014 02:26, "Brad Rice" <bradrice1@gmail.com> wrote:
>
> I have three tables. The first one is application which has a flag for if an app has been submitted as well as created date and modified date. The other two tables relate to the application table. I have two forms that get update those tables. What I want to do is update the application modified date from the save on the other forms.
>
> I have this in the Application model
> modified    = models.DateTimeField(auto_now_add=True)
>
> but since it is the other tables I am saving to, I'm not sure how to update that field whenever the other two tables update.
>
> My view for one of the forms looks like this:
>
> class AnswersUpdate(UpdateView):
>     model = Answers
>     form_class = AnswersForm
>     slug_field = 'created_by'
>     template_name = 'requestform/applicant_form.html'
>
>     @method_decorator(login_required(login_url='/accounts/login/'))
>     def dispatch(self, *args, **kwargs):
>         return super(AnswersUpdate, self).dispatch(*args, **kwargs)
>
>     def get_object(self, queryset=None):
>         return Answers.objects.get(created_by=self.request.user)
>
>     def form_valid(self, form):
>         obj = form.save(commit=False)
>         obj.created_by = self.request.user
>         obj.save()
>         a = Application.objects.get(created_by=self.request.user)
>        ## how do I save to the Application here?

#if its a new record, something like ....
application =  Application.objects.create(...)

#if you are updating a record, something like...
application = Application.objects.get(...) # can throw exception
application.field_name = something
application.save ()

>         return HttpResponseRedirect(reverse('requestform:app_check', kwargs={'app_id': obj.id}))
>
> Any help would be appreciated.
>
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