在我的 models.py 文件中,我有:
class Place(models.NodeModel):
name = models.StringProperty()
class Person(models.NodeModel):
name = models.StringProperty()
age = models.IntegerProperty()
location = models.Relationship('self', rel_type='lives_in', related_name='place')
class Pet(models.NodeModel):
name = models.StringProperty()
owner = models.Relationship(Person,
rel_type='owns',
single=True,
related_name='pets'
)
然后我有一个 Person 类的实例“Pete”:
neo4j-sh (Pete,2)$ ls
==> *age =[30]
==> *name =[Pete]
==> (me)-[:owns]->(Garfield,4)
==> (me)-[:lives_in]->(London,6)
==> (me)<-[:<<INSTANCE>>]-(mydb:Person,1)
获取皮特的年龄和姓名没有问题,但查询相关实体时遇到问题。
例如,试图得到他的位置,我跑
Person.objects.get(name='Pete').select_related('place')[0].name
但我得到一个错误: AttributeError: 'Person' object has no attribute 'select_related'
你能告诉我我做错了什么吗?