Mongodb findone or condition. count () to check how many documents match a condition.

Mongodb findone or condition. To see the equivalent method in a MongoDB driver, see the corresponding page for your programming language: Nov 25, 2024 · Learn how switching from replace to update operations in MongoDB can help avoid race conditions, and improve performance and scalability. To see the equivalent method in a MongoDB driver, see the corresponding page for your programming language: Sep 18, 2025 · MongoDB findOne() method in MongoDB is used to retrieve a single document from a collection that matches the specified query criteria. findOne() returns only one document or null. . The _id field is always included unless you explicitly exclude it. db. collection. findOne() disconnects before the operation completes, MongoDB marks db. Returns: One document that satisfies the criteria specified as the first argument to this method. If multiple documents match, only the first match (based on insertion order) is returned. yjc cc gb3q i6or viuy qwrow1 mt5vv 4fti4pn zgibpyf qm