Question

我想将项目推送到项目数组（根文档＆gt;类别＆gt;子类别＆gt;项目）

我正在使用NodeJS和MongoDB npm包

我的文档结构应如下所示

{
    "_id": "572a77641b24ed3404f43690"
    "categories": [
        {
            "id": "572bbac072d7ee3026a69467"
            "Name": "Foods",
            "subcategories": [
                {
                    "id": "572a777c1b24ed3404f43691",
                    "Name": "Pizza"
                    "items": [
                        {
                            "id": "572ba1666ca263303121acd4"
                            "Name": "4 Seasons",
                            "Price": "6.0"
                        }
                    ]
                }
            ]
        }
    ]
}

我目前的代码是

app.post("/item/:subcatid", function(req, res) {
    var subId = req.params.subcatid;
    var item = req.body;

    item.id = new ObjectId();

    items.update({ "categories.subcategories.id": ObjectId(subId) }, { $push: { "categories.0.subcategories.$.items": item } }, function(err, result) {
        res.send(result);
    });
});

我该怎么办？

Answer 1

刚刚找到了一个解决方案，但不是干净的，但工作正常！

app.post("/item/:subcatid", function(req, res) {
    var subId = req.params.subcatid;
    var item = req.body;

    item.id = new ObjectId();

    items.findOne({ "categories.subcategories.id": ObjectId(subId) }, { "categories.subcategories.$": 1 }, function(err, doc) {
        for (var i = 0; i < doc.categories[0].subcategories.length; i++) {
            var elem = doc.categories[0].subcategories[i];
            if (elem.id == subId) {
                items.update({ "categories.subcategories.id": ObjectId(subId) }, { $push: { ["categories." + i + ".subcategories.$.items"]: item } }, function(err, result) {
                    res.send(result);
                });

                break;
            }
        }
    });
});

更新mongodb中数组数组的项目

1 个答案: