Question

我正在尝试修改文档中的某些字段

{
"_id": 5,
"Applicates": [

        {
            "School": "UCONN",
            "Name": "Mike",
            "Research": "cloud computing",
            "Budge": 5000,
            "appId": 100,
            "Time": "5/5/5-6/6/6",
            "citizenship": "us",
            "Evaluators": [
                {
                    "abstractScore": null,
                    "goalsObjectivesScore": null,
                    "evalNum": 1
                },
                {
                    "abstractScore": null,
                    "goalsObjectivesScore": null,
                    "evalNum": 2
                },
                {
                    "abstractScore": null,
                    "goalsObjectivesScore": null,
                    "evalNum": 3
                }
            ],
            "Major": "csc",
            "preAwards": "none",
            "Advisor": "Dr. pie"
        },
        {
            "School": "psu",
            "Name": "Tom",
            "Research": "topology",
            "Budge": 7500,
            "appId": 101,
            "Time": "1/1/1-2/2/2",
            "citizenship": "us",
            "Evaluators": [
                {
                    "abstractScore": null,
                    "goalsObjectivesScore": null,
                    "evalNum": 1
                },
                {
                    "abstractScore": null,
                    "goalsObjectivesScore": null,
                    "evalNum": 2
                },
                {
                    "abstractScore": null,
                    "goalsObjectivesScore": null,
                    "evalNum": 3
                }
            ],
            "Major": "MAT",
            "preAwards": "none",
            "Advisor": "Dr. cool"
        }
    ]
}

我需要更新所有空值。我一直试图用$ set在python中做这件事，但没有运气。这就是我的尝试

posts.update({"_id" : 5,"Applicates.Name":"Mike","Application.Evaluators.evalNum":"1"},{"$set":{"Applicates.Evaluators.abstractScore" :10}})

所以我问我如何单独更新每个空字段？我希望上面的代码要做的是更新abstractScore中的Evaluators中的第一个{"Applicates.Name" : 'Mike"}。我还要分别更新abstractScore的其他2 {"Applicates.Name" : 'Mike"}和{"Applicates.Name" : "Tom"}的3。当然我也希望goalsObjectivesScore更新，但我一次尝试做一步。

我环顾四周退出了很多，似乎找不到可靠的答案。任何帮助将不胜感激。

Answer 1

我与这行代码足够接近。这不完全是我想要的，但我让它能够满足我的需求。

posts.update({"_id":5,"Applicates.appId":100},{"$set":{"Applicates.$.Evaluators.0.abstractScore": 10}})

mongodb中的多级嵌入式文档

1 个答案: