Django - How to increment integer field from user input?

Question

I\'m new to Django, but I\'m building a website where people can make statements regarding certain debatable topics. Right now I\'ve just manually added a few statements for

Answer 1

You can get the user input with

statements = request.POST.getlist('statement')

From that list, you can increase the vote count and update database like

for st in statements:
    statement = Statement.objects.get(id=st)
    statement.vote += 1
    statement.save()

Hope this helps you.

Answer 2

kyiphyu's code can be further simplified using F expressions:

from django.db.models import F

Statement.objects.filter(id__in=statements).update(vote=F('vote') + 1)