Question

我决定使用Async模块按我想要的顺序填充mongodb集合。
如果没有异步，则代码可以工作，但是文档的插入顺序不正确：

function insertRowInBLD(ref, riskstatements, maximpact, controleffectiveness, recommendedriskrating, frequency, impact, validatedreviewriskrating, rationalforriskadjustment) {
    const businessLineDashboard = new BusinessLineDashboard({
        ref: ref,
        riskstatements: riskstatements,
        maximpact: maximpact,
        controleffectiveness: controleffectiveness,
        recommendedriskrating: recommendedriskrating,
        frequency: frequency,
        impact: impact,
        validatedreviewriskrating: validatedreviewriskrating,
        rationalforriskadjustment: rationalforriskadjustment
    });
    businessLineDashboard.save()
        .then(row => {
            console.log('row ' + businessLineDashboard.ref + ' has been inserted succesfully');
        })
        .catch(err => {
            console.log('err: ', err);
        });
}

我希望按此顺序插入“文档”。由于JavaScript的异步特性，因此没有发生。所以我尝试使用

async.series：

function fillBLD() {
    async.series(
        [
            insertRowInBLD('R01', 'Disclosure of data due to deliberate action by internal actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
            insertRowInBLD('R02', 'Corruption of data due to deliberate action by internal actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
            insertRowInBLD('R03', 'Unavailability of data due to deliberate action by internal actor', 'E. Not significant', 'Partially effective', '', '', '', '', ''),
            insertRowInBLD('R04', 'Disclosure of data due to attack of the communications link by internal/external actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
            insertRowInBLD('R05', 'Corruption of data due to attack of the communications link by internal/external actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
        ]
    );
}

但是，我不断收到此错误：

ProjectPath \ node_modules \ mongodb \ lib \ utils.js：132         犯错         ^

TypeError：无法读取的属性'Symbol（Symbol.toStringTag）'   未定义

任何想法都可能导致此错误，如何解决？
谢谢！

Answer 1

您的product(cls.keys(), repeat=len(cls.keys))函数必须返回一个insertRowInBLD实例，而不是现在的Promise。 undefined正在传递Async.series数组。

这个。

undefined

实际上是这个。

function fillBLD() {
    async.series(
        [
            insertRowInBLD('R01', 'Disclosure of data due to deliberate action by internal actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
            insertRowInBLD('R02', 'Corruption of data due to deliberate action by internal actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
            insertRowInBLD('R03', 'Unavailability of data due to deliberate action by internal actor', 'E. Not significant', 'Partially effective', '', '', '', '', ''),
            insertRowInBLD('R04', 'Disclosure of data due to attack of the communications link by internal/external actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
            insertRowInBLD('R05', 'Corruption of data due to attack of the communications link by internal/external actor', 'E. Not significant', 'Partially effective', 'Low', '', '', '', ''),
        ]
    );
}

结合使用MongoDb和Async来按顺序填充收藏文档

1 个答案: