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

这个coffeescript为我与节点工作-技巧是_id获取剥离了它的ObjectID包装时,发送和返回从客户端,所以这需要替换为更新(当没有_id提供,保存将恢复到插入和添加一个)。

app.post '/new', (req, res) ->
    # post data becomes .query
    data = req.query
    coll = db.collection 'restos'
    data._id = ObjectID(data._id) if data._id

    coll.save data, {safe:true}, (err, result) ->
        console.log("error: "+err) if err
        return res.send 500, err if err

        console.log(result)
        return res.send 200, JSON.stringify result

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”}); }); });

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);
    });
//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); 
  });
});


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

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

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();