我需要设置一个嵌套数组的对象,其属性为“default=true”,但我只需要一个具有此属性,其他对象不得具有此属性。例子:{"_id":"xxxxx","name":"Jmae","desktops":[{"_id":"xxxxx","name":"Mike","default":true},{"_id":"xxxxx","name":"Aris"},{"_id":"xxxxx","name":"John"}]}这只设置,但不删除:varfilter={"_id":platformId,"desktops._id":desktopId},updateParams={"$set":{"