node.js - 带有 ids 数组的 mongoose findOneAndUpdate 回调

Question

我在 forEach 循环中使用 findOneAndUpdate 来创建/更新多个条目。

我希望它返回它已创建或更新的所有对象 ID 的数组。

在循环期间，我可以看到它向数组添加数据，但一旦离开循环，数组就是空的。

不应该填充数组吗？

这是我的代码。

var softwareArray = ["Software1","Software2","Software3"],
updatedArray = [];

softwareArray.forEach(function(software){
    Software.findOneAndUpdate(
        {
            Name: software
        },
        {
            Name: software
        },
        {upsert:true},
        function(err, rows){
            updatedArray.push(rows._id);
            console.log(updatedArray); //This has data in it....
        }
    );
});
console.log(updatedArray); //This has no data in it...

编辑:更新了我对蒂亚戈的工作更改

var softwareArray = ["Software1","Software2","Software3"],
updatedArray = [];

loopSoftware(softwareArray, function(updatedArray){
    console.log(updatedArray);
    //carry on....
}

function loopSoftware(input, cb){
    var returnData = [];

    var runLoop = function(software, done) {
        Software.findOneAndUpdate(
            {Name: software},
            {Name: software},
            {upsert:true},function(err, rows){
                returnData.push(rows._id);
                done()
            }
        );
    };

    var doneLoop = function(err) {

        cb(returnData);

    };

    async.forEachSeries(input, runLoop, doneLoop);
}

Answer 1

我修饰了你的代码，让你知道什么时候发生了什么:

var softwareArray = ["Software1","Software2","Software3"],
updatedArray = [];

//  TIMESTAMP: 0

softwareArray.forEach(function(software){

    //  TIMESTAMP: 1, 2, 3

    Software.findOneAndUpdate(
        {
            Name: software
        },
        {
            Name: software
        },
        {upsert:true},
        function(err, rows){
            // TIMESTAMP: 5, 6, 7
            updatedArray.push(rows._id);
            console.log(updatedArray); // This has data in it....

            // want to use the result?
            if (updatedArray.length == softwareArray.length) {
                console.log(updatedArray);
            }
        }
    );
});

// TIMESTAMP: 4

console.log(updatedArray);