Pre-populating data in the admin panel

In the Django Admin I want to populate fields for a foreign key record when I click the add (+) button
I tried with formfield_for_foreignkey but it does not work

model

class Property(models.Model):      name = models.CharField(_('name'), max_length=50)      description = models.TextField(_('description'), blank=True)      class Physic(models.Model):      name = models.ForeignKey(Property, verbose_name=_('name'), null=True, blank=True,)      lapropriete = models.CharField(_('property'), max_length=100)      class UniteProperty2(models.Model):      name = models.ForeignKey(Material, verbose_name=_('name'))                                       nature_unit = models.ForeignKey(Property, verbose_name=_('category'))                         choix = models.ForeignKey(Physic, verbose_name=_('properties'), null=True, blank=True,  related_name='UniteProperty2_choix') 

forms

def formfield_for_foreignkey(self, db_field, request, **kwargs):

         

        if db_field.name == 'nature_unit':

            kwargs['queryset'] = Property.objects.all()

            return db_field.formfield(**kwargs)

        if db_field.name == 'choix':

            kwargs['queryset'] = Physic.objects.all()

            return db_field.formfield(**kwargs)

            

 

        return super(UniteProperty2Inline, self).formfield_for_foreignkey(db_field, request, **kwargs)

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