2. " insert " is means " insert it if a record is not exited" and "ignore it if a record has existed". The simple case of using the save operation is to save a POJO. In this case, the collection name will be determined by name (not fully qualified) of the class. You may also call the save operation with a specific collection name. boolean. The mongoDB multi is an optional parameter of MongoDB update () method. If this parameter is set to true, then It'll update the multiple documents when meeting the query selection. The default value of this parameter is false. If this argument is set to false then it will update the single document. writeConcern. 2022. 7. 27. · If the collection does not currently exist, insert operations will create the collection. MongoDB provides the following methods to insert documents into a collection: db.collection.insertOne () db.collection.insertMany () In this tutorial, we are going to use the above methods to insert single or multiple documents in the collection. 2022. 5. 13. · 2. Configure MongoDB Queries Logging. MongoDB Support offers the MongoOperations interface or its primary MongoTemplate implementation to access data, so all we need is to configure a debug level for the MongoTemplate class. Like any Spring or Java application, we can use a logger library and define a logging level for MongoTemplate.

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