使用查询

Question

我只想从以下集合中获取状态为“ ac”的用户。下面是我的样本集合。

我的收藏集

{
    "_id" : ObjectId("5c480da48e80b74fa0a35fff"),
    "exercise" : [],
    "name" : "Challenge 03",
    "groups" : [ 
        {
            "_id" : ObjectId("5c480dbe8e80b74fa0a36000"),
            "hostGroup" : {
                "groupId" : ObjectId("5c471a9f6d70c44d642e414f"),
                "status" : "in",
                "date" : ISODate("2019-01-23T06:46:22.366Z"),
                "users" : [ 
                    {
                        "_id" : ObjectId("5c480dbe8e80b74fa0a36002"),
                        "usersId" : ObjectId("5c4719a76d70c44d642e413d"),
                        "date" : ISODate("2019-01-22T13:31:05.021Z"),
                        "status" : "in"
                    }, 
                    {
                        "_id" : ObjectId("5c480dbe8e80b74fa0a36001"),
                        "usersId" : ObjectId("5c4719bb6d70c44d642e413e"),
                        "date" : ISODate("2019-01-22T13:31:05.021Z"),
                        "status" : "ac"
                    }
                ]
            }
        }
    ],
    "__v" : 0
}

我尝试过的查询

 db.challenge.find({ 
    "groups.hostGroup.users.status": "ac"
 }, { 
    name: 1, 
    "groups.hostGroup.users.status": 1 
 })

我只希望记录状态为“ ac”的记录，而不应该返回状态为“ in”的文档。

  

期望输出

{
    "_id" : ObjectId("5c480da48e80b74fa0a35fff"),
    "exercise" : [],
    "name" : "Challenge 03",
    "groups" : [ 
        {
            "_id" : ObjectId("5c480dbe8e80b74fa0a36000"),
            "hostGroup" : {
                "groupId" : ObjectId("5c471a9f6d70c44d642e414f"),
                "status" : "in",
                "date" : ISODate("2019-01-23T06:46:22.366Z"),
                "users" : [
                    {
                        "_id" : ObjectId("5c480dbe8e80b74fa0a36001"),
                        "usersId" : ObjectId("5c4719bb6d70c44d642e413e"),
                        "date" : ISODate("2019-01-22T13:31:05.021Z"),
                        "status" : "ac"
                    }
                ]
            }
        }
    ],
    "__v" : 0
}