Django Initial Value For Foreignkey Field

Question

I'm trying to pass some initial data to the volume field in CourseForm , but for some reason it won't work. The volume field is a ForeignKey to a table in the database.

It doesn't give me errors; it just doesn't display any information.

My model with the respective volume field:

class Course(models.Model):
    volume = models.ForeignKey(CourseVolume)
    code = models.CharField(max_length=100, default=None)
    # ... code shortend to simplify

My Modelform with its model set to Course

class CourseForm(ModelForm):
    class Meta:
        model = Course
        fields = '__all__'

My view where I'm trying to set the initial data for the CourseForm . It just doesn't seem to work. user.volume_preference returns an integer from 1 to x which is the id for the specific volume.

def view_course_create(request):
    if request.method == 'POST':
        form = CourseForm(request.POST)
        if form.is_valid():
            form.save()
            return redirect('teaching_courses')
    else:
        user = MbsUser.get_user_from_ad(request.session['username'])
        if user.volume_preference is not None:
            volume = user.volume_preference
            form = CourseForm(initial={'volume': volume})
        else:
            form = CourseForm()
    return render(request, 'teaching/course_create.html', {'form': form})

My CourseVolume model:

class CourseVolume(CourseEnum):
    published = models.BooleanField(default=False)

class Meta(CourseEnum.Meta):
    db_table = 'mbs_course_volume'

How can this be solved?

Answer 1

Try to add a default value for the volume field. The value should be the existing id of the related table(CourseVolume).

volume = models.ForeignKey(CourseVolume, default=1)