我如何更新/upsert一个文档在猫鼬?

也许是时间的问题，也许是我淹没在稀疏的文档中，无法理解Mongoose中的更新概念:)

事情是这样的:

我有一个联系模式和模型(缩短属性):

var mongoose = require('mongoose'),
    Schema = mongoose.Schema;

var mongooseTypes = require("mongoose-types"),
    useTimestamps = mongooseTypes.useTimestamps;


var ContactSchema = new Schema({
    phone: {
        type: String,
        index: {
            unique: true,
            dropDups: true
        }
    },
    status: {
        type: String,
        lowercase: true,
        trim: true,
        default: 'on'
    }
});
ContactSchema.plugin(useTimestamps);
var Contact = mongoose.model('Contact', ContactSchema);

我从客户端收到一个请求，包含我需要的字段，然后使用我的模型:

mongoose.connect(connectionString);
var contact = new Contact({
    phone: request.phone,
    status: request.status
});

现在问题来了:

If I call contact.save(function(err){...}) I'll receive an error if the contact with the same phone number already exists (as expected - unique) I can't call update() on contact, since that method does not exist on a document If I call update on the model: Contact.update({phone:request.phone}, contact, {upsert: true}, function(err{...}) I get into an infinite loop of some sorts, since the Mongoose update implementation clearly doesn't want an object as the second parameter. If I do the same, but in the second parameter I pass an associative array of the request properties {status: request.status, phone: request.phone ...} it works - but then I have no reference to the specific contact and cannot find out its createdAt and updatedAt properties.

因此，我的底线是:给定一个文档联系人，如果它存在，我如何更新它，如果它不存在，我如何添加它?

谢谢你的时间。

当前回答

你曾经和

Contact.update({phone:request.phone}, contact, {upsert: true}, function(err){...})

但是第二个参数应该是一个带有修改操作符的对象

Contact.update({phone:request.phone}, {$set: { phone: request.phone }}, {upsert: true}, function(err){...})

2011-09-20 14:33:27

其他回答

这对我很管用。

App.put ('/student/:id'， (req, res) => { Student.findByIdAndUpdate (req.params。id,点播。Body (err, user) => { 如果(err) { 返回res .status (500) .send({错误:“失败”}) }; res.send({成功:“成功”}); })； })；

2017-10-06 09:14:27

非常优雅的解决方案，你可以通过使用chain of Promises实现:

app.put('url', (req, res) => {

    const modelId = req.body.model_id;
    const newName = req.body.name;

    MyModel.findById(modelId).then((model) => {
        return Object.assign(model, {name: newName});
    }).then((model) => {
        return model.save();
    }).then((updatedModel) => {
        res.json({
            msg: 'model updated',
            updatedModel
        });
    }).catch((err) => {
        res.send(err);
    });
});

2017-01-31 11:35:02

我等了很久，还是没有回音。最后放弃了整个更新/upsert方法，并使用:

ContactSchema.findOne({phone: request.phone}, function(err, contact) {
    if(!err) {
        if(!contact) {
            contact = new ContactSchema();
            contact.phone = request.phone;
        }
        contact.status = request.status;
        contact.save(function(err) {
            if(!err) {
                console.log("contact " + contact.phone + " created at " + contact.createdAt + " updated at " + contact.updatedAt);
            }
            else {
                console.log("Error: could not save contact " + contact.phone);
            }
        });
    }
});

这有用吗?是的。我满意吗?可能不会。2个DB调用而不是1个。希望将来的Mongoose实现能提出一个模型。插入功能。

2011-09-05 03:09:10

2.6引入了一个bug，影响到2.7

upsert过去在2.4上正常工作

https://groups.google.com/forum/ !主题/ mongodb-user / UcKvx4p4hnY https://jira.mongodb.org/browse/SERVER-13843

看一下，它包含了一些重要的信息

更新:

这并不意味着upsert不起作用。下面是一个如何使用它的好例子:

User.findByIdAndUpdate(userId, {online: true, $setOnInsert: {username: username, friends: []}}, {upsert: true})
    .populate('friends')
    .exec(function (err, user) {
        if (err) throw err;
        console.log(user);

        // Emit load event

        socket.emit('load', user);
    });

2014-05-16 00:36:17

没有其他的解决方案对我有效。我使用post请求和更新数据，如果发现其他插入它，_id也与需要删除的请求体一起发送。

router.post('/user/createOrUpdate', function(req,res){
    var request_data = req.body;
    var userModel = new User(request_data);
    var upsertData = userModel.toObject();
    delete upsertData._id;

    var currentUserId;
    if (request_data._id || request_data._id !== '') {
        currentUserId = new mongoose.mongo.ObjectId(request_data._id);
    } else {
        currentUserId = new mongoose.mongo.ObjectId();
    }

    User.update({_id: currentUserId}, upsertData, {upsert: true},
        function (err) {
            if (err) throw err;
        }
    );
    res.redirect('/home');

});

2017-09-21 12:19:00

我如何更新/upsert一个文档在猫鼬?

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