WebMongodb 中文文档 - WriteResult () Docs4dev 主从复制 Sharding 分片集群组件 Shards 配置服务器 (元数据) Router (mongos) Shard Keys Hashed Sharding Ranged Sharding 部署分片集群 Zones Management 碎片区 按位置细分数据 用于更改 SLA 或 SLO 的分层硬件 按应用或 Client 细分数据 仅插入工作负载的分布式本地写入 使用块进行数据分区 在分片群 … Web11 mei 2024 · 1 Answer Sorted by: 1 MongoDB will not update a document if it's already in its "updated" state. For example, using the mongo shell: > db.test.find () {"_id": 0, "a": 0} > db.test.update ( {_id:0}, {$set: {a:1}}) WriteResult ( { "nMatched": 1, "nUpserted": 0, "nModified": 1 })

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Webfinal public MongoDB\Driver\WriteResult::getMatchedCount (): ? int If the update operation results in no change to the document (e.g. setting the value of a field to its … Webcom.mongodb.WriteResult public class WriteResult extends java.lang.Object This class lets you access the results of the previous acknowledged write. If the write was … long term fentanyl side effects

PHP: MongoDB\Driver\WriteResult::getMatchedCount - Manual

WebWriteResult具有以下属性： WriteResult. nInserted. 插入的文档数，不包括upserted个文档。有关通过增补插入的文档数，请参见WriteResult.nUpserted。 WriteResult. nMatched. … Web包装器，其中包含 mongo ... WriteResult.nInserted¶. 插入的文档数，不包括 upserted 文档。请参阅 WriteResult.nUpserted 以获取通过upsert ... WebWriteResult() A wrapper that contains the result status of mongoshwrite methods. Tip See: db.collection.insert() db.collection.update() db.collection.remove() Note db.collection.insert()and db.collection.update()are deprecated. The results returned by the replacement methods have a different format. For output similar to WriteResult(), consider long-term fertilization