MongoDB - 更新集合中嵌套数组中的对象（嵌套更新）答案

【问题标题】：MongoDB - Update objects in side a nested array in a collection (nested updating)MongoDB - 更新集合中嵌套数组中的对象（嵌套更新）
【发布时间】：2023-04-03 01:05:01
【问题描述】：

更新前的优惠券收集

{
    "_id": ObjectId("571501b7cbd85fe5ce5a749c"),
    "storeCode": "LULUMALL",
    "offers": [{
            "name": "offer1",
            "coupens": [
                { "coupen": "adssd", "status": "open" },
                { "coupen": "sdsafa", "status": "open" },
                { "coupen": "wewerw", "status": "open" },
                { "coupen": "cvvdf", "status": "open" },
                { "coupen": "dfdfadf", "status": "open" },
                { "coupen": "dfdfd", "status": "open" },
                { "coupen": "dfdf", "status": "open" },
                { "coupen": "dfsdf", "status": "open" }
            }
        ]
    },
    {
        "name": "offer2",
        "coupens": [
            { "coupen": "dffddd", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "sdfsdf", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "sfsdfd", "status": "open" },
            { "coupen": "dffdfd", "status": "open" },
            { "coupen": "sdfsdf", "status": "open" },
            { "coupen": "dfdfdd", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "dfsdff", "status": "open" },
        ]
    }]
}

我有storeCode,offer name&coupen。所以我需要将对应对象的status更新为alloted。

例如：如果storeCode =LULUMALL ,name=offer1& coupen=adssd，所以我需要将对应对象的status更新为allotted。更新后，集合应该像这。 更新后的Coupen收集

{
    "_id": ObjectId("571501b7cbd85fe5ce5a749c"),
    "storeCode": "LULUMALL",
    "offers": [{
            "name": "offer1",
            "coupens": [
                { "coupen": "adssd", "status": "allotted" },
                { "coupen": "sdsafa", "status": "open" },
                { "coupen": "wewerw", "status": "open" },
                { "coupen": "cvvdf", "status": "open" },
                { "coupen": "dfdfadf", "status": "open" },
                { "coupen": "dfdfd", "status": "open" },
                { "coupen": "dfdf", "status": "open" },
                { "coupen": "dfsdf", "status": "open" }
            }
        ]
    },
    {
        "name": "offer2",
        "coupens": [
            { "coupen": "dffddd", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "sdfsdf", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "sfsdfd", "status": "open" },
            { "coupen": "dffdfd", "status": "open" },
            { "coupen": "sdfsdf", "status": "open" },
            { "coupen": "dfdfdd", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "dfsdff", "status": "open" },
        ]
    }]
}

【问题讨论】：

标签： mongodb mongoose nosql

【解决方案1】：

我只是将这些数据复制到一个新变量中，并根据条件将status字段的值更改为allotted。

这里shopData是输入数据

var updateData = shopData;

updateData 是shopData 的副本。

updateCoupen.offers[index].coupens[randomNo].status = 'allotted';

index 和randomNo 将根据条件获取。

Coupen.update({ "storeCode": store }, { $set: { 'offers': updateData.offers } }, function(err, numAffected) {
    console.log('numAffected', numAffected);

})

完整代码

var store = 'LULUMALL';
var name = 'offer1';
var coupen = 'adssd';
var shopData = {
    "_id": ObjectId("571501b7cbd85fe5ce5a749c"),
    "storeCode": "LULUMALL",
    "offers": [{
            "name": "offer1",
            "coupens": [
                { "coupen": "adssd", "status": "open" },
                { "coupen": "sdsafa", "status": "open" },
                { "coupen": "wewerw", "status": "open" },
                { "coupen": "cvvdf", "status": "open" },
                { "coupen": "dfdfadf", "status": "open" },
                { "coupen": "dfdfd", "status": "open" },
                { "coupen": "dfdf", "status": "open" },
                { "coupen": "dfsdf", "status": "open" }
            }
        ]
    },
    {
        "name": "offer2",
        "coupens": [
            { "coupen": "dffddd", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "sdfsdf", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "sfsdfd", "status": "open" },
            { "coupen": "dffdfd", "status": "open" },
            { "coupen": "sdfsdf", "status": "open" },
            { "coupen": "dfdfdd", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "dfdfdf", "status": "open" },
            { "coupen": "dfsdff", "status": "open" },
        ]
    }]
}

for (var i = 0; i < shopData.offers.length; i++) {
    if (shopData.offers[i].name === offer) {
        var coupen = [];
        var index = i;
        for (var j = 0; j < shopData.offers[i].coupens.length; j++) {
            if (shopData.offers[i].coupens[j].status === "open") {

                coupen.push(shopData.offers[i].coupens[j]);
            }
        }
        console.log('Available Coupens', coupen);
        var randomNo = Math.floor(Math.random() * coupen.length);
        var rand = coupen[randomNo];
        var updateCoupen = shopData;
        updateCoupen.offers[index].coupens[randomNo].status = 'allotted';
        Coupen.update({ "storeCode": store }, { $set: { 'offers': updateCoupen.offers } }, function(err, numAffected) {
            console.log('numAffected', numAffected);

        })

    }
}

【讨论】：