Database IntegrationLesson 68Free preview

MongoDB Update

This lesson is part of Node.js · All levels

Summary

This lesson teaches updating MongoDB documents from Node.js with updateOne, updateMany, and replaceOne. You use operators like $set, $inc, and $push to change some or all of the contents of a document without losing any other fields. The results of the operation loaded matchedCount and modifiedCount to verify the changes.

Key points

$set specifies the field that has been changed; $unset deletes the field; $inc adds numbers.
UpdateOne changes one document, updateMany changes all that matches.
Upsert option: true create documents when they do not exist (update-or-create pattern).
ReplaceOne replaces all the contents of the document except _id; updateOne changes some.
The results loaded matchedCount (which matches) and modifiedCount (which actually changes).

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.