09

findOneAndUpdate. 光看上方語法就可以很直覺知道分別是搜尋ID 並更新以及搜尋並更新，那寫法有差嗎？讓我們先來看一下 findOneAndUpdate. 1 2 3 4 5 6

Mongoose's findOneAndUpdate() function finds the first document that matches a given filter , applies an update , and returns the document.

使用 upsert 选项，你可以将 findOneAndUpdate() 用作find-and-upsert 操作。如果upsert 找到与 filter 匹配的文档，则其行为类似于正常的 findOneAndUpdate() 。

As the name implies, findOneAndUpdate() finds the first document that matches a given filter, applies an update, and returns the document. Getting Started · Atomic Updates · Upsert

This should update color value to undefined in my MongoDB. However, the color remains same as provided initially whereas the name updates.

Use $addToSet with $each to update the array and use $set to update the rest of the fields. This can be done in the same query.

The findOneAndUpdate method in Mongoose is a powerful tool for performing atomic updates, upsert operations and updating discriminator keys. Its ...

findOneAndUpdate allows developers to easily find a single document in a MongoDB collection, update it, and optionally return either the original or the ...

db.collection.findOneAndUpdate() updates the first matching document in the collection that matches the filter . If no document matches the filter , no document ...