CODEWITHSUNDEEP
pythondjangomaterialize
came leon
came leon

Reputation: 13

pass pk to CreateView form in django

i'm new to django.

I have a model that looks like this:

models.py

class Intervention(models.Model):
subject = models.CharField(max_length=200)
begin_date = models.DateField(default=datetime.datetime.today)
end_date = models.DateField(default=datetime.datetime.today)
description = models.TextField(blank=True)
speaker = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
campus = models.ForeignKey(Campus, on_delete=models.CASCADE)

class Meta:
    verbose_name = 'Intervention'
    verbose_name_plural = 'Interventions'

def __str__(self):
    return self.subject

class Evaluation(models.Model):
interventions = models.ForeignKey(Intervention, on_delete=models.CASCADE)
student_id = models.CharField(max_length=20)
speaker_knowledge_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
speaker_teaching_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
speaker_answer_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
slide_content_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
slide_examples_mark = models.IntegerField(validators=[MaxValueValidator(20), MinValueValidator(0)])
comment = models.TextField(blank=True)

The idea is when that the student enter the website on home page he have to choose the campus where he study then he is redirected to a page where he see only interventions of his campus then when he choose the intervention he get the detail of it :

Home page screen

Interventions page

Intervetion detail page

Everything is working so far. Now on "intervention detail page" when the user click on "give mark" he is redirected to a page to create mark (i use CreateView class-based) like below:

create mark

Now my question is how can i replace Modelchoicefield in the generated form by pk of the intervetion that student want to give a mark?

Views.py

class CreateEvaluationView(CreateView):
form_class = NewEvaluation
template_name = 'mark.html'
def home(request):
   campus = Campus.objects.all().order_by('-name')
return render(request, 'home.html', {'campus': campus})

def mark(request):
if request.method == 'POST':
    campus = request.POST.get('campus')
    intervention = Intervention.objects.filter(campus=campus)
    return render(request, 'mark.html', {'intervention': intervention})

def intervention_detail(request, pk):
intervention_detail = get_object_or_404(Intervention, pk=pk)
return render(request, 'intervention_detail.html', {'intervention_detail': intervention_detail})

urls.py

    path('', views.home, name='home'),
path('mark/', views.mark, name='mark'),
path('mark/<int:pk>/', views.intervention_detail, name='intervention_detail'),
path('mark/create/', CreateEvaluationView.as_view(template_name="givemark.html"), name='newmark'),
path('intervention/create/', login_required(CreateInterventionView.as_view(template_name="intervention_create.html")), name='create'),
path('intervention/', login_required(ListInterventionView.as_view(template_name="intervention_list.html")), name='list'),

Thanks in advance for your help! Bast regards.

Upvotes: 1

Views: 2319

Answers (1)

Gasanov
Gasanov

Reputation: 3399

You need to provide Intervention pk to your form. Simplest solution would be to just pass it with url:

path('mark/create/<int:intervention_pk>', CreateEvaluationView.as_view(template_name="givemark.html"), name='newmark'),

It will require modification in your template to pass intervention pk, such as reverse('newmark', intervention_pk=intervention.pk)

Exclude intervention pk from your form, so your users will not be able to modify it accidentally.

class NewEvaluation(forms.ModelForm):
    class Meta:
        model = Evaluation
        exclude = ('interventions',)

Set intervention pk right before you save your form:

class CreateEvaluationView(CreateView):
    form_class = NewEvaluation
    template_name = 'mark.html'

    def form_valid(self, form):
        intervention = Intervention.objects.get(pk=self.kwargs['intervention_pk'])
        self.object = form.save(commit=False)
        self.object.interventions = intervention
        self.object.save()

Upvotes: 5

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