在NodeJS中交换值的函数w / mongo + mongoose

Question

我试图创建一个接收2个日期的路线，并在数据库中互相交换这些日期。

控制台正在打印，但数据库中的数据没有变化

// @route   PATCH api/swap
// @desc    replace date
// @access  Public

router.put("/swap", (req, res) => {
  const firstDate = req.body.firstDate;
  const secondDate = req.body.secondDate;

  // console.log(firstDate, secondDate);

  // Card.updateOne({ date: firstDate }, { $set: { date: secondDate } });

  Card.find()
    .then(cards => {
      cards.forEach(card => {
        if (card.date === firstDate) {
          return card.updateOne(
            { date: firstDate },
            { $set: { date: secondDate } }
          );
        } else if (card.date === secondDate) {
          return card.updateOne(
            { date: secondDate },
            { $set: { date: firstDate } }
          );
        } else {
          return card;
        }
      });
    })
    .then(() => console.log("working"));
});

Answer 1

从Mongo UpdateOne Documentation UpdateOne需要3个参数过滤，更新，回调，所以我相信你需要传递集合的_id来改变。

Update- find（）返回一个游标并使用foreach将其转换为使用find().toArray().then(..so on)的数组

// @route   PATCH api/swap
// @desc    replace date
// @access  Public

router.put("/swap", (req, res) => {
const firstDate = req.body.firstDate;
const secondDate = req.body.secondDate;

console.log(firstDate, secondDate);

Card.find().toArray().then(cards=>cards.forEach(card => {
    if (card.date === firstDate) {
      return card.updateOne( { date: firstDate } ,{ $set: { date: secondDate } });
    } else if (card.date === secondDate) {
      return card.updateOne( { date: secondDate },{ $set: { date: firstDate } });
    } else {
      return card;
    }
  });
}))
.then(() => console.log("working"));
 });