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

以Martin Kuzdowicz上面的帖子为基础。我使用以下内容使用mongoose和json对象的深度合并进行更新。与mongoose中的model.save()函数一起，这允许mongoose进行完整的验证，即使是依赖于json中的其他值。它确实需要deepmerge包https://www.npmjs.com/package/deepmerge。但这是一个非常轻的包装。

var merge = require('deepmerge');

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

    const modelId = req.body.model_id;

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

2017-04-17 18:25:54

其他回答

app.put('url', function(req, res) {

        // use our bear model to find the bear we want
        Bear.findById(req.params.bear_id, function(err, bear) {

            if (err)
                res.send(err);

            bear.name = req.body.name;  // update the bears info

            // save the bear
            bear.save(function(err) {
                if (err)
                    res.send(err);

                res.json({ message: 'Bear updated!' });
            });

        });
    });

这里有一个更好的方法来解决猫鼬的更新方法，你可以检查苏格兰。IO了解更多详情。这绝对对我有用!!

2015-07-22 02:46:19

//Here is my code to it... work like ninj

router.param('contractor', function(req, res, next, id) {
  var query = Contractors.findById(id);

  query.exec(function (err, contractor){
    if (err) { return next(err); }
    if (!contractor) { return next(new Error("can't find contractor")); }

    req.contractor = contractor;
    return next();
  });
});

router.get('/contractors/:contractor/save', function(req, res, next) {

    contractor = req.contractor ;
    contractor.update({'_id':contractor._id},{upsert: true},function(err,contractor){
       if(err){ 
            res.json(err);
            return next(); 
            }
    return res.json(contractor); 
  });
});


--

2014-11-07 07:58:09

如果生成器可用，这将变得更加简单:

var query = {'username':this.req.user.username};
this.req.newData.username = this.req.user.username;
this.body = yield MyModel.findOneAndUpdate(query, this.req.newData).exec();

2015-05-10 15:01:20

User.findByIdAndUpdate(req.param('userId'), req.body, (err, user) => {
    if(err) return res.json(err);

    res.json({ success: true });
});

2017-08-31 07:42:19

您可以简单地用它更新记录，并获得更新后的数据作为响应

router.patch('/:id', (req, res, next) => {
    const id = req.params.id;
    Product.findByIdAndUpdate(id, req.body, {
            new: true
        },
        function(err, model) {
            if (!err) {
                res.status(201).json({
                    data: model
                });
            } else {
                res.status(500).json({
                    message: "not found any relative data"
                })
            }
        });
});

2018-05-07 14:00:10

我如何更新/upsert一个文档在猫鼬?

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