From http://stackoverflow.com/questions/8992865/django-admin-sort-foreign-key-field-list 自定义admin中add下拉对象的顺序

custom_admin_add_foreignkey_order.py

class MyModelAdmin(admin.ModelAdmin):
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "school":
            kwargs["queryset"] = School.objects.order_by('name')
        return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)

my_custom.py

def formfield_for_foreignkey(self, db_field, request, **kwargs):
    if db_field.name == "section":
        kwargs["queryset"] = self.model.section.field.related_model.objects.order_by('-pk')
    return super(SectionExerciseAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)