mongoose Model.update() - 仅更新提供的值

Question

我有以下架构:

const wordSchema = mongoose.Schema({
  author: {type: String, index: true, default: 'unknown'},
  quote: String,
  source: {type: String, default: 'unknown', index: true},
  rating: {type: Number, default: 0},
  createdAt: {type: Date, default: Date.now},
  updatedAt: {type: Date, default: Date.now},
});

以及我的快递应用中的以下PUT路线:

// Route to update a quote in the DB
app.put('/words/:id', function(req, res) {
  const quote = new Word({
    _id: req.params.id,
    author: req.body.author,
    quote: req.body.quote,
    source: req.body.source,
    rating: req.body.rating,
    updatedAt: Date.now(),
  });
  Word.update(quote, function(err, raw) {
    if (err) {
      res.send(err);
    }
    res.send(raw);
  });
});

现在,当我发送PUT请求时,如果未提供使用默认值设置的参数,则将使用模式中的默认值填充它们.如何仅更新提供的值？

谢谢您的帮助.

Answer 1

不要Word为更新创建新实例,update需要条件和doc对象参数,以便单独标识要更新的文档并提供其更新的值:

app.put('/words/:id', function(req, res) {
  const doc = {
    author: req.body.author,
    quote: req.body.quote,
    source: req.body.source,
    rating: req.body.rating,
    updatedAt: Date.now(),
  });
  Word.update({_id: req.params.id}, doc, function(err, raw) {
    if (err) {
      res.send(err);
    }
    res.send(raw);
  });
});