MongoOperations findAndModify and updateFirst do not include the _class in Map values [DATAMONGO-1236] · Issue #2150 · spring-projects/spring-data-mongodb · GitHub
Upsert in MongoDB - GeeksforGeeks
MongoDB - FindAndModify() Method - GeeksforGeeks
MongoDB 的findAndModify 指令
MongoDB Search by ID Example - Examples Java Code Geeks - 2023