小编Zer*_*ero的帖子

我有一堂课：

class POI(Document):\n    location = PointField(required=True)\n    name = StringField(default='')\n    generate_by = IntField(required=True)\n    status = StringField(default='Active')\n    colle\xd1\x81ted_by = IntField()\n    time_created = DateTimeField(default=datetime.datetime.now)\n

当我尝试插入时

POI(location=[55.430212, 30.521000], generate_by=1241254, name="Sample", collected_by=None)\n

发生错误

mongoengine.errors.FieldDoesNotExist: The fields "{'collected_by'}" do not exist on the document "POI"\n

怎么了？