Джонго и Джанго
Проект Django и Djongo
Model.py
from djongo import models
class Son(models.Model):
name=models.CharField()
last_name=models.CharField()
class Master (models.Model)
_id = models.ObjectIdField()
son = models.EmbeddedField()
objects = models.DjongoManager()
Ошибка ->
return getattr(self, meta.pk.attname)
AttributeError: 'NoneType' object has no attribute 'attname'
помогите пожалуйста