Django - change select items display

I use ModelForm. One of the fields is:

repertoire = models.ForeignKe开发者_运维知识库y(Repertoire)

I need to change its display type. Instead of using __str__ (or __unicode__ in Python 2) in display I want to show name and date of repertoire.

How can I do this with ModelForm?

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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())