From 1c77d672305c762690c26e9f823e89cb725b8611 Mon Sep 17 00:00:00 2001
From: tactonbishop <tactonbishop@gmail.com>
Date: Sat, 13 Aug 2022 10:30:03 +0100
Subject: [PATCH] Last Sync: 2022-08-13 10:30:03

---
 Databases/MongoDB/Update_document.md | 35 ++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Databases/MongoDB/Update_document.md

diff --git a/Databases/MongoDB/Update_document.md b/Databases/MongoDB/Update_document.md
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+---
+tags:
+- Databases
+- mongo_db
+- node-js
+- mongoose
+---
+
+# Update a MongoDB document
+
+There are two methods for updating a document
+* query first 
+* update first
+
+## Query first document update
+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.  
+
+```js
+async function updateCourseFromQuery(id) {
+    const course = await Course.findById(id);
+    if (!course) return;
+    course.set({
+        isPublished: true,
+        author: 'A new author'
+    })
+
+    // Instead of an object, we could also set the updated properties individually
+    course.isPublished = true;
+    course.author = 'Biggs Volunksire'
+    
+    const result = course.save()
+    console.log(result);
+}
+
+```