Django auto increment in form

Question

Lets say I have this model.py:

class Order(models.Model):
    delivery = models.BooleanField()

I have this form.py:

class OrderForm(ModelForm):
    class Meta:
        model = Order
        fields = ["delivery"]

And I have this views.py:

def get_order(request):
    if request.method == "POST":
        form = OrderForm(request.POST)
        if form.is_valid():
            order_instance = Order(form.cleaned_data["delivery"])
            order_instance.save()
            return HttpResponseRedirect("/end")
    else:
        form = OrderForm()
    return render(request, "forms/test.html", {"form": form})

And the HTML page show form page.

With this code my program will tell me that he is not happy because I am giving "null" to "delivery" field because Django automatically create a "id" field for each model so he want me to give him the "id" and the "delivery" fields.

The "id" field is supposed to auto increment though. It is my primary key. But with form it doesn't seem to work. Is there a way to only specify the delivery and let the auto increment do the job for the id ?

Does this answer your question? [How do I make an auto increment integer field in Django?](https://stackoverflow.com/questions/21128899/how-do-i-make-an-auto-increment-integer-field-in-django) — Laxmikant Ratnaparkhi, Aug 27 '21 at 13:18

score 0 · Answer 1 · edited Aug 27 '21 at 12:12

0

If you want the form on django template then add a context dictionary.

context = {
'form':form,
}
return render(request, 'appname/template-name.html', context)

Add this after the else statement.

edited Aug 27 '21 at 12:12

zabop

6,750
3
39
84

answered Aug 27 '21 at 12:05

apollos

341
1
10

I dont have any problem with my form display. My question regard the "id" field. I dont want the user to have anything to do with this field. He is supposed to auto increment but its not working. – Titouan Aug 27 '21 at 13:02

score 0 · Answer 2 · answered Aug 27 '21 at 14:00

0

The auto increment of an id field doesn't work because you don't save the object retreived from the form. Try to use order_instance.save(). Also see the documentation.

answered Aug 27 '21 at 14:00

Andrzej Kapczyński

1
1
2

Just saw I did some error in the code I posted. Its not the problem though because its not my true code. I will edit my post. – Titouan Aug 27 '21 at 14:52

score 0 · Answer 3 · answered Aug 29 '21 at 12:57

0

Have you registered the Model in the admin.py file? if not then go your app folder and locate the admin.py and do this:

from .models import modelnamehere
admin.site.register(modelnamehere)

Do this and let me know if your problem was solved. Ordinarily django adds the id field to your models automatically.

answered Aug 29 '21 at 12:57

apollos

341
1
10

Yes it is already registered in the admin file – Titouan Aug 30 '21 at 07:48

Django auto increment in form

3 Answers3