javascript - Mongoose 更新子文档并保存不起作用

Question

尝试更新数组中的对象。

我的代码:

module.exports = (req, res) => {

  var givenProject = req.body;
  var query = mongoose.model('cv').findOne({alias: req.params.alias});

  query.exec(function(err, cv){
    if(err){
      res.status(400).send({message: 'Could not find cv with alias: ' + req.params.alias, err: err})
     }
    var doc = cv.projects.id(req.params.id);
    doc.langTitles = givenProject.langTitles;
    doc.langDescriptions = givenProject.langDescriptions;
    doc.save(function(err){
      if(err){
        res.status(400).send({message: 'Could not update project', err: err});
        return;
      }
      res.status(200).send();
    });
  });
};

没有给出错误。找到var doc，发布的数据与doc具有相同的数据结构，但与原始数据不同。

该文档未更新。我在这里缺少什么？

Answer 1

根据 Mongoose 的说法docs :

Sub-documents enjoy all the same features as normal documents. The only difference is that they are not saved individually, they are saved whenever their top-level parent document is saved.

因此尝试替换

doc.save(function(err) ...

与

cv.save(function(err) ...