Django Createview default value for a foreign key field

Question

I have two classes(tables) schools and students that are related together(foreignkey) When I create a new student I want it to autofill the school field (which is a foreignk

Answer 1

If you want to give a default value for your FK field go with default attribute. Django already gives the option to add a default value to your field.

DEFAULT_SCHOOL_ID = 1
class Student(models.Model):
   ...
   school=models.ForeignKey(School, default=DEFAULT_SCHOOL_ID)

You are an overriding get_initial method its used for Returns the initial data to use for forms on this view not actually adding a default value to your field

Answer 2

Since you are storing the school's slug in the URL, it would be better to leave the school field out of the form. Then you can set the school in the form_valid method:

from django.shortcuts import get_object_or_404

class StudentCreateView(CreateView):
    fields = ("name","age",)  # don't include 'school' here
    ...

    def form_valid(self, form):
        school = get_object_or_404(School, slug=self.kwargs['school'])
        form.instance.school = school
        return super(StudentCreateView, self).form_valid(form)