36 lines
912 B
Markdown
36 lines
912 B
Markdown
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---
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tags:
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- Databases
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- mongo_db
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- node-js
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- mongoose
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---
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# Update a MongoDB document
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There are two methods for updating a document
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* query first
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* update first
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## Query first document update
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With this approach we first execute a [query](/Databases/MongoDB/Querying_a_collection.md) to retrieve the document we want to edit and then make the change. We use the `findById` method to identify the document by its UUID and then `set` to update specified properties on the document.
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```js
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async function updateCourseFromQuery(id) {
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const course = await Course.findById(id);
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if (!course) return;
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course.set({
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isPublished: true,
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author: 'A new author'
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})
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// Instead of an object, we could also set the updated properties individually
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course.isPublished = true;
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course.author = 'Biggs Volunksire'
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const result = course.save()
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console.log(result);
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}
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```
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