编辑操作在Node中失败

Question

这是我的代码：

router.post('/update-posting', (req, res, next) => {
    Account.findById(req.user._id)
        .then(doc => {
            var type = [];
            if (req.body.full !== undefined) {
                type.push('full');
            }
            if (req.body.part !== undefined) {
                type.push('part');
            }
            if (req.body.seasonal !== undefined) {
                type.push('seasonal');
            }
            if (req.body.temporary !== undefined) {
                type.push('temp');
            }
            var title = req.body.title;
            var salary = req.body.salary;
            var timeline = req.body.timeline;
            var experience = req.body.experience;
            var description = req.body.description;
            var duties = req.body.duties;
            doc.postings[req.body._id] = {
                _id: req.body._id,
                title: title,
                type: type,
                salary: salary,
                timeline: timeline,
                description: description,
                duties: duties,
                experience: experience,
            };
            doc.save(r=>console.log(r));
        })
        .then(() => res.redirect('/employer/booth-edit'))
        .catch(e => console.log(e))
});

这是模特：

var mongoose = require('mongoose');
var plm = require('passport-local-mongoose');
var accountSchema = new mongoose.Schema({
    // username (comes with passport): email; -> just for reference.
    accType: String,
    fullName: String,
    displayName: String,
    companyName: String,
    contactPersonFullName: String,
    companyWebsite: String,
    city: String,
    province: String,
    postalCode: String,
    phoneNumber: String,
    hiringRegion: [], // TODO
    description: String,
    logo: [],
    workingWithEOESC: Boolean,
    industry: String,
    phone: String,
    ageGroup: String,
    education: String,
    lookingForWork: String,
    employmentStatus: String,
    resume: [],
    mainWorkExp: String,
    boothVisits: Number,
    postings: []
});
accountSchema.plugin(plm);
module.exports = mongoose.model('account', accountSchema);

我正在做的是尝试更新postss数组中的对象。现在这里是奇怪的部分。当我在 doc.save()之前控制台记录结果 时，我得到了更新版本......当我在控制台上记录来自doc.save()的响应时，我得到了null ......我确定这是一个小虫子，但我无法在任何地方看到它。

所有字段都来自req.body对象。

以下是日志。

原始对象：

{ _id: 0,
    title: 'Web developer',
    type: [ 'full', 'seasonal' ],
    salary: '14$',
    timeline: '3 months',
    description: 'tada',
    duties: 'tada',
    experience: '5 years' }

更新了对象：

{ _id: '0',
    title: 'Car mechanic',
    type: [ 'part', 'temp' ],
    salary: '50$',
    timeline: '2 weeks',
    description: 'desc',
    duties: 'resp',
    experience: '4 years' }

doc.save()回复：

null

更有趣的是，这是我用于“创建”职位发布的代码。这几乎是相同的代码，它运作得非常好：

router.route('/add-posting')
    .get((req, res, next) => {
        res.render('users/employer/add-posting', {
            title: 'Employer Booth - Add Job Posting',
            user: req.user
        });
    })
    .post((req, res, next) => {
        // Determining type of work.
        var type = [];
        if (req.body.full !== undefined) {
            type.push('full');
        }
        if (req.body.part !== undefined) {
            type.push('part');
        }
        if (req.body.seasonal !== undefined) {
            type.push('seasonal');
        }
        if (req.body.temporary !== undefined) {
            type.push('temp');
        }
        var title = req.body.title;
        var salary = req.body.salary;
        var timeline = req.body.timeline;
        var experience = req.body.experience;
        var description = req.body.description;
        var duties = req.body.duties;

        Account.findById(req.user._id)
            .then(doc => {
                doc.postings.push({
                    _id: doc.postings.length,
                    title: title,
                    type: type,
                    salary: salary,
                    timeline: timeline,
                    description: description,
                    duties: duties,
                    experience: experience,
                });
                doc.save();
            })
            .then(() => res.redirect('/employer/booth-edit'))
            .catch(e => console.log(e));
    });

Answer 1

我记得以前我遇到过这个问题。原来我们需要更新数组：

doc.postings.set(req.body._id, {
    _id: req.body._id,
    title: title,
    type: type,
    salary: salary,
    timeline: timeline,
    description: description,
    duties: duties,
    experience: experience,
});

我记得在那里读过一个问题。如果我再次找到它，将添加链接。

我们需要使用.set方法而不是=运算符。

Answer 2

他们这样做可能会有效。但是mongo已经为您提供了update或findOneAndupdate方法。我建议你使用它们。

您的查询在需要时很容易理解和调试。

尝试类似

的内容

db.collection.update({_id: .user._id},{$push :{postings:  yourObject}})