new_contents: from django.forms import models
  from django.forms.fields import ChoiceField
  
  
  class AdvancedModelChoiceIterator(models.ModelChoiceIterator):
      def choice(self, obj):
          return (
              self.field.prepare_value(obj),
              self.field.label_from_instance(obj),
              obj
          )
  
  
  class AdvancedModelChoiceField(models.ModelChoiceField):
      def _get_choices(self):
          if hasattr(self, '_choices'):
              return self._choices
  
          return AdvancedModelChoiceIterator(self)
  
      choices = property(_get_choices, ChoiceField._set_choices)
  
  
  class AdvancedModelMultipleChoiceField(models.ModelMultipleChoiceField):
      def _get_choices(self):
          if hasattr(self, '_choices'):
              return self._choices
  
          return AdvancedModelChoiceIterator(self)
  
      choices = property(_get_choices, ChoiceField._set_choices)
  
subject: Add ModelChoiceField util to use actual objects