Question

我在名为model.py

的文件中有以下架构

from mongoengine import *

class Subject(Document):
    uri = StringField(required=True)
    resources = ListField(ReferenceField(ResourceSubject))

class ResourceSubject(Document):
    subject = ReferenceField(Subject,reverse_delete_rule=CASCADE)
    resource = ReferenceField(Resource)

class Resource(EmbeddedDocument):
    uri = StringField()
    title = StringField()
    snippet = StringField()
    image = StringField()
    source = StringField()
    adapter = StringField()

出于某种原因，当我尝试初始化主题时，subj = Subject(uri="hello").save()我收到了一个名称错误：NameError: name 'ResourceSubject' is not defined。

我无法理解原因，我猜这与框架有关？我尝试在单个文件中分离类然后导入，但我仍然得到相同的错误。我错过了什么？

此行上出现错误：resources = ListField(ReferenceField(ResourceSubject))

Answer 1

将ResourceSubject放入引号：

resources = ListField(ReferenceField('ResourceSubject'))

MongoEngine schemata - 名称错误

1 个答案: