[英]MongoEngine doesn't see pre-existing records
我在MongoEngine中設置我的模型,並嘗試查詢它(我的集合中已有幾十個文檔),但查詢集為空:
>>> mymodel.objects
[]
我可以添加新文檔,這些文檔會顯示在后續查詢中,但是有我之前存在的文檔的標志:
>>> thingy = mymodel(a=2, b=3)
>>> thingy.save()
>>> mymodel.objects
[<mymodel: mymodel object>]
是什么賦予了? 作為參考,這是我的模型定義:
from django.conf import settings
from mongoengine import *
connect(settings.MONGO_DATABASE,
host=settings.MONGO_HOST, port=settings.MONGO_PORT)
class metadata(Document):
meta = {'collection': 'metadata'}
_id = StringField()
name = StringField()
_type = StringField()
terms = ListField()
level = StringField()
abbreviation = StringField()
latest_update = DateTimeField()
feature_flags = ListField()
session_details = DictField()
legislature_name = StringField()
lower_chamber_name = StringField()
upper_chamber_term = IntField()
upper_chamber_name = StringField()
lower_chamber_term = IntField()
lower_chamber_title = StringField()
upper_chamber_title = StringField()
_ignored_scraped_sessions = ListField()
如果MongoEngine自己的作者回答了這個問題,我想提前表達你的真實情況!
沒關系,文檔回答了我的問題:
要將MongoEngine與現有數據一起使用,必須在模型定義中設置allow_inheritance = False
,因為MongoEngine的繼承工具在文檔上設置了其他屬性(_cls和_types),然后(顯然)使用它們來過濾MongoEngine查詢。 另一種選擇可能是將這些屬性添加到現有文檔中。
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