使用mongoose更新，不返回任何错误但不更新 [英] Updating with mongoose, not returning any errors but neither updating

问题描述

我正在尝试用猫鼬学习CRUD。我只是错过了更新部分。我做错了什么？

I am trying to learn CRUD with mongoose. I am only missing the update part. What am I doing wrong?

MY MODEL

var mongoose = require('mongoose');

var testSchema = new mongoose.Schema({
    name: String,
    number: Number
});

mongoose.model('TestData', testSchema);

MY ROUTES

// get the models
var Test = mongoose.model('TestData');

PARAM

如果链接有'test'作为url参数，它将查看对象是否存在于数据库中，否则返回错误。

PARAM
If the link has the 'test' as a url parameter, it will look if the object exist in the database, else return errors.

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

    query.exec(function(err, test){
        if(err){ return next(err); }
        if(!test){ return next(new Error('can\'t find test')); }
        req.test = test;
        return next();
    });
});

GET BY ID

    /* GET testdata/:id */
    router.get('/testingdata/:test', function(req, res, next){
        req.test.populate('test', function(err, test){
            res.json(test);
        });
    });

DELETE

/* DELETE testdata/:id */
router.delete('/testingdata/:test', function(req, res, next){
    req.test.remove('test', function(err, test){
        console.log('removed');
        res.json(test);
    });                         
});

我的问题

现在问题来了我的问题如果我尝试更新一个，我只是遗漏了一些东西。

MY PROBLEM
Now here comes my problem, if I try to update one, I am simply missing something.

/* PUT testdata/:id */
router.put('/testingdata/:test', function(req, res, next){
    req.test.update('test',{$set: {name: 'new data'}} , function(err, test){
        res.json(test);
    });                         
});

我没有收到任何错误，但它既没有更新任何内容。它甚至返回了一些数据。

I am not getting any errors, but it is neither updating anything. It is even returning some data.

{
    "ok": 0,
    "n": 0,
    "nModified": 0
}

推荐答案

尝试没有不需要的第一个参数（ test ），因为 req.test 是测试的一个实例 model。

Try without unneeded first argument (test), because the req.test is an instance of the Test model.

req.test.update({name: 'new data'} , function(err, test){
  res.json(test); // test would be `1` if success
});

更新方法不会返回对象，如果你想返回对象，那么使用 save ：

The update method will not return object, and if you want to return object then use save:

req.test.name = 'new data';
req.test.save(function(err, test){
  res.json(test);
});

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