mongodb更新不适用于嵌套子文档

Question

我的 mongodb 记录就像这个链接Updating nested array inside array mongodb 和示例记录如下，并且想要更新嵌套文档“参数”数组中的字段，只要它满足一些条件（_id：“04”，操作。_id： "100" 和 operations.parameters.pid : "012")，这个更新查询 UPDATES 错误的嵌套记录 (operations.parameters.pid : '011') ，请帮忙看看我哪里出错了：

       {
"_id" : "04",
"name" : "test service 4",
"id" : "04",
"version" : "0.0.1",
"title" : "testing",
"description" : "test",
"protocol" : "test",
"operations" : [ 
    {
        "_id" : "99",
        "oName" : "test op 52222222222",
        "sid" : "04",
        "name" : "test op 52222222222",
        "oid" : "99",
        "description" : "testing",
        "returntype" : "test",
        "parameters" : [ 
            {
                "oName" : "Param1",
                "name" : "Param1",
                "pid" : "011",
                "type" : "582",
                "description" : "testing",
                "value" : "",
                "version" : 1.0
            }, 
            {
                "oName" : "Param2",
                "name" : "Param2",
                "pid" : "012",
                "type" : "58222",
                "description" : "testing",
                "value" : "",
                "version" : 2.0
            }
        ]
    }, 
    {
        "_id" : "100",
        "oName" : "test op 909090",
        "sid" : "05",
        "name" : "test op 90909",
        "oid" : "1009",
        "description" : "testing",
        "returntype" : "test",
        "parameters" : [ 
            {
                "oName" : "Param1",
                "name" : "Param1",
                "pid" : "011",
                "type" : "582",
                "description" : "testing",
                "value" : "",
                "version" : 1.0
            }, 
            {
                "oName" : "Param2",
                "name" : "Param2",
                "pid" : "012",
                "type" : "58222",
                "description" : "testing",
                "value" : "",
                "version" : 2.0
            }
        ]
    }, 
    {
        "_id" : "101",
        "oName" : "test op 52222222222",
        "sid" : "04",
        "name" : "test op 52222222222",
        "oid" : "99",
        "description" : "testing",
        "returntype" : "test",
        "parameters" : [ 
            {
                "oName" : "Param1",
                "name" : "Param1",
                "pid" : "011",
                "type" : "582",
                "description" : "testing",
                "value" : "",
                "version" : 1.0
            }, 
            {
                "oName" : "Param2",
                "name" : "Param2",
                "pid" : "012",
                "type" : "58222",
                "description" : "testing",
                "value" : "",
                "version" : 1.0
            }
        ]
    }, 
    {
        "_id" : "102",
        "oName" : "test op 909090",
        "sid" : "05",
        "name" : "test op 90909",
        "oid" : "1009",
        "description" : "testing",
        "returntype" : "test",
        "parameters" : [ 
            {
                "oName" : "Param1",
                "name" : "Param1",
                "pid" : "011",
                "type" : "582",
                "description" : "testing",
                "value" : "",
                "version" : 1.0
            }, 
            {
                "oName" : "Param2",
                "name" : "Param2",
                "pid" : "012",
                "type" : "58222",
                "description" : "testing",
                "value" : "",
                "version" : 2.0
            }
        ]
    }
]
   }

我的更新查询如下：

 db.foo.update(
{ $and : [{'_id':'04'},
{'operations._id':'100' },
{'operations.parameters.pid': '012'}]},
{
    "$set": { 
        "operations.1.parameters.$.dummy": "foo"
    }
}
     )

我正在使用 mongodb 3.6.2 引用 https://docs.mongodb.com/master/reference/operator/update/positional-filtered/ 此链接的示例记录：

   {
"_id" : 1.0,
"grades" : [ 
    {
        "type" : "quiz",
        "questions" : [ 
            10.0, 
            8.0, 
            5.0
        ]
    }, 
    {
        "type" : "quiz",
        "questions" : [ 
            8.0, 
            9.0, 
            6.0
        ]
    }, 
    {
        "type" : "hw",
        "questions" : [ 
            5.0, 
            4.0, 
            3.0
        ]
    }, 
    {
        "type" : "exam",
        "questions" : [ 
            25.0, 
            10.0, 
            23.0, 
            0.0
        ]
    }
]
   }

来自此链接的示例

   db.student3.update(
   {},
        { $inc: { "grades.$[t].questions.$[score]": 2 } },
     { arrayFilters: [ { "t.type": "quiz" } , { "score": { $gte: 8 } } ], multi: true}
      )

我从 robo-3t 得到的错误：

 cannot use the part (grades of grades.$[t].questions.$[score]) to traverse the element ({grades: [ { type: "quiz", questions: [ 10.0, 8.0, 5.0 ] }, { type: "quiz", questions: [ 8.0, 9.0, 6.0 ] }, { type: "hw", questions: [ 5.0, 4.0, 3.0 ] }, { type: "exam", questions: [ 25.0, 10.0, 23.0, 0.0 ] } ]})

请帮忙； 问候 克里斯

Answer 1

在你的更新操作中

"$set": { 
        "operations.1.parameters.$.dummy": "foo"
    }

指操作中的第一个元素，它是具有"_id" : "100", 的元素，并且在参数数组中，$ 更新数组中的第一个元素。

如果要使用$[] 更新嵌套数组元素以更新所有匹配元素，则需要考虑使用 mongodb 3.6。

在 3.4 版本中执行此操作的一种可能方法是获取所需的子文档并在应用程序端进行匹配和更新。