Django ModelForm instance with custom queryset for a specific field

Question

I have a model not unlike the following:

class Bike(models.Model):
    made_at = models.ForeignKey(Factory)
    added_on = models.DateField(auto_add_now=True         


        

Answer 1

Nowaday, you should use:

    form.base_fields['alumno_item'].queryset = AlumnoItem.objects.prefetch_related(
        'alumno',
        'alumno__estudiante',
        'alumno__estudiante__profile',
        'item'
    )

Answer 2

You question might be a dupe of this.

S. Lott's answer there is the ticket to solve your problem. He answered:

ForeignKey is represented by django.forms.ModelChoiceField, which is a ChoiceField whose choices are a model QuerySet. See the reference for ModelChoiceField.

So, provide a QuerySet to the field's queryset attribute. Depends on how your form is built. If you build an explicit form, you'll have fields named directly.

form.rate.queryset = Rate.objects.filter(company_id=the_company.id) If you take the default ModelForm object, form.fields["rate"].queryset = ...

This is done explicitly in the view. No hacking around.

Answer 3

try something like this in the view

form  = BikeForm()
form.fields["made_at"].queryset = Factory.objects.filter(user__factory)

modify the Factory queryset so that it identifies the factory which the user works at.