Django - change select items display

Question

I use ModelForm. One of the fields is:

repertoire = models.ForeignKey(Repertoire)

I need to change its display type. Instead o

Answer 1

Subclass ModelChoiceField and override label_from_instance to return the repertoire name and date. Then use the new field in your ModelForm.

from django import forms

class RepertoireModelChoiceField(forms.ModelChoiceField):
    def label_from_instance(self, obj):
        return "%s - %s" % (obj.name, obj.date)

class MyModelForm(forms.ModelForm):
    repertoire = RepertoireModelChoiceField(queryset=Repertoire.objects.all())