mongodb如何更新數組中數組的元素

Question

我想在監護人中更新手機，文件格式如下

{
    "_id" : ObjectId("575e4d850d61a206084ff035"),
    "students" : [
            {
                    "_id": "58454c8fd01c35cb06ac1d7c",
                    "guardians": [
                         {
                             _id: "5710b9dbb6744ac07aee6a6d",
                             contact: {
                                 mobile: "15800000000"
                             }
                         }
                         ...
                     ]
            }
            ...
       ]
}

Answer 1

您可以使用$ set運算符執行此操作。

https://docs.mongodb.com/manual/reference/operator/update/set/#set-elements-in-arrays