Node.js 如何在mongoose中使用多于$group

]

在上面的json响应中

如何将PracticeValue、StatusValue分组为单个函数

[

{
    "_id":"56569bff5fa4f203c503c792",
    "Status":{
        "StatusID":2,
        "StatusObjID":"56559aad5fa4f21ca8492277",
        "StatusValue":"Closed"
    },
    "OwnerPractice":{
        "PracticeObjID":"56559aad5fa4f21ca8492291",
        "PracticeValue":"CCC",
        "PracticeID":3
    },
    "Name":"AA"
},
{
    "_id":"56569bff5fa4f203c503c792",
    "Status":{
        "StatusID":2,
        "StatusObjID":"56559aad5fa4f21ca8492277",
        "StatusValue":"Open"
    },
    "OwnerPractice":{
        "PracticeObjID":"56559aad5fa4f21ca8492292",
        "PracticeValue":"K12",
        "PracticeID":2
    },
    "Name":"BB"
}

以下代码仅用于对StatusValue进行分组，请帮助如何使用相同功能对练习值进行分组

[

{
    "_id":"56569bff5fa4f203c503c792",
    "Status":{
        "StatusID":2,
        "StatusObjID":"56559aad5fa4f21ca8492277",
        "StatusValue":"Closed"
    },
    "OwnerPractice":{
        "PracticeObjID":"56559aad5fa4f21ca8492291",
        "PracticeValue":"CCC",
        "PracticeID":3
    },
    "Name":"AA"
},
{
    "_id":"56569bff5fa4f203c503c792",
    "Status":{
        "StatusID":2,
        "StatusObjID":"56559aad5fa4f21ca8492277",
        "StatusValue":"Open"
    },
    "OwnerPractice":{
        "PracticeObjID":"56559aad5fa4f21ca8492292",
        "PracticeValue":"K12",
        "PracticeID":2
    },
    "Name":"BB"
}

我的回答是

Opp.aggregate([
     {$group: {
         _id: '$Status.StatusValue',
         count: {$sum: 1}
     }}
], function (err, result) {
    res.send(result);
});

---

您可以按多个字段分组，如下所示：

[
    {
        "_id":"Deleted",
        "count":0
    },
    {
        "_id":"Open",
        "count":1
    },
    {
        "_id":"Closed",
        "count":1
    }
]


please help me, how to use more then $group function..

---

上面的代码没有得到预期的响应，计数值不正确我期待下面的响应格式，[{“Status”：[{“\u id”：“Deleted”，“count”：0}，{“\u id”：“Open”，“count”：1}，{“\u id”：“Closed”，“count”：1}]}，{“Practice”：[{“\u id”：“K12”，“count”：31}，{“\u id”：“HK”，“count”：12}]}]在这种情况下，您需要执行两个聚合查询