Re: App_step.readme_id may not be NULL

On Thursday, January 30, 2014 9:08:22 AM UTC-8, Wnt2bsleepin wrote:

I am new to Django and am trying to save two objects from the same form. 

Models:

class ReadmeTemplate(models.Model):

    """

        Represents a bugfix README

        Contains step models, which contain multiple steps.

    """

    def __unicode__(self):

        return self.title

    title = models.CharField(max_length=200)

    author = models.CharField(max_length=200)

    user = models.ForeignKey(User,editable=False)

class Step(models.Model):

    """

        Represents a single step in a Readme Template

    """

    step_text = models.TextField()

    readme = models.ForeignKey(ReadmeTemplate)

I am able to save the ReadmeTemplate fine, but the Steps are not able to be saved. Here is what I am trying in the view.

def createTemplate(request):

    StepFormSet = modelformset_factory(Step, max_num=100, form=CreateStepForm,extra=1)

    if(request.method == 'POST'):

        readme_form = CreateReadmeTemplateForm(request.POST)

        step_forms = StepFormSet(request.POST)

        if readme_form.is_valid() and step_forms.is_valid():

            try:

                readme_object = readme_form.save()

                readme_object.user = request.user

                readme_object.save()

                step_forms.readme_id = readme_object.id

                step_forms.save()

            except forms.ValidationError, error:

                readme_object = None

            return HttpResponse('<script type="text/javascript">opener.dismissAddAnotherPopup(window, "%s", "%s");</script>' % (escape(readme_object._get_pk_val()), escape(readme_object)))

        return render(request,'App/newtemplate.html',{'readme_form':readme_form,'step_forms': step_forms})

    else:

        readme_form = CreateReadmeTemplateForm()

        step_forms = StepFormSet(queryset=Step.objects.none())

        return render(request,'App/newtemplate.html',{'readme_form':readme_form,'formset': step_forms})

Is there anyway to get the id of the readme object and assign it to the step object? Thanks for any help.

All you need to do is to set the readme_object to the readme attribute of step_forms, Django will extract the id for you and set it appropriately.

step_forms.readme = readme_object

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