Mongoengine find one
As of MongoEngine 0.8 the querysets utilise a local cache. So iterating it multiple times will only cause a single query. If this is not the desired behaviour you can ... ,key_or_list – a single index key or a list of index keys (to construct a multi-field index); keys may be prefixed with a + or a - to determine the index ordering ...
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 Mongoengine find one 相關參考資料
2.5. Querying the database — MongoEngine 0.19.1 ...
As of MongoEngine 0.8 the querysets utilise a local cache. So iterating it multiple times will only cause a single query. If this is not the desired behaviour you can ... http://docs.mongoengine.org 2.5. Querying the database — MongoEngine 0.20.0 ...
As of MongoEngine 0.8 the querysets utilise a local cache. So iterating it multiple times will only cause a single query. If this is not the desired behaviour you can ... https://docs.mongoengine.org 3. API Reference — MongoEngine 0.19.1 documentation
key_or_list – a single index key or a list of index keys (to construct a multi-field index); keys may be prefixed with a + or a - to determine the index ordering ... http://docs.mongoengine.org find() and findOne() in mongoengine - Stack Overflow
1 Answer. To retrieve a result that should be unique in the collection, use get(). This will raise DoesNotExist if no document matches the query, and MultipleObjectsReturned if more than one document ... https://stackoverflow.com How to search document by oid in mongoengine - Stack ...
2012年4月3日 — How about just using the raw string: Docs.objects.get(id='4f4381f4e779897a2c000009'). That is probably the easiest way ... right ? https://stackoverflow.com mongodb - mongoengine中的find()和findOne() - IT工具网
如何使用MongoEngine快速查找（）或findone（）， 我已经有了这个，但它似乎不是正确的方式： Cars.objects()._collection.find_one('model':2013}). 最佳答案. https://www.coder.work mongoengine - filter by "OR" on a single field in a single query ...
You can use Q class : from mongoengine.queryset.visitor import Q as MQ ... https://stackoverflow.com Mongoengine find document without a field - Stack Overflow
2019年7月4日 — You can try : Chat.objects.get(deal__exists=False). or. Chat.objects(deal__exists=False)[0]. to find the first result. https://stackoverflow.com |