Adds a _id suffix to PrimaryKeyRelatedField

gistfile1.py

class IdManyRelatedField(ManyRelatedField):
    field_name_suffix = '_ids'

    def bind(self, field_name, parent):
        self.source = field_name[:-len(self.field_name_suffix)]
        super().bind(field_name, parent)


class IdPrimaryKeyRelatedField(PrimaryKeyRelatedField):
    """
    Field, that renames the field name to FIELD_NAME_id.

    Only works together the our ModelSerializer.
    """
    many_related_field_class = IdManyRelatedField
    field_name_suffix = '_id'

    def bind(self, field_name, parent):
        """
        Called when the field is bound to the serializer.

        Changes the source  so that the original field name is used (removes
        the _id suffix).
        """
        if field_name:
            self.source = field_name[:-len(self.field_name_suffix)]
        super().bind(field_name, parent)


class IdModelSerializer(ModelSerializer):
    """
    ModelSerializer that changes the field names of related fields to
    FIELD_NAME_id.
    """
    serializer_related_field = IdPrimaryKeyRelatedField

    def get_fields(self):
        fields = super().get_fields()
        new_fields = type(fields)()

        for field_name, field in fields.items():
            try:
                field_name += field.field_name_suffix
            except AttributeError:
                pass
            new_fields[field_name] = field
        return new_fields

Just noting that I've been unable to make the IdModelSerializer work with the UniqueTogetherValidator that results from defining a 'unique_together' constraint on the model.

Apart from that, these classes have been very successful in working around one source of pain in the Django Rest Framework.