Node.js MongoDB Update

Here is a complete, easy, and practical guide for Node.js MongoDB Update operations.

✅ Node.js MongoDB Update

MongoDB provides two main update methods:

MethodDescription
updateOne()Updates the first matching document
updateMany()Updates all matching documents

To update fields, MongoDB uses the $set operator.

⭐ 1. Update One Document

Set a new address where name = “John”


 

⭐ 2. Update Many Documents

Set the city = “Surat” for all customers from Gujarat


 

⭐ 3. Update Using Comparison Operators

Example: Increase age by 1 for all users age > 25


⭐ 4. Update Array Fields

Add a value to array ($push)


Remove from array ($pull)


⭐ 5. Update Nested Fields

Example document:


Update nested field:


⭐ 6. Replace Entire Document (replaceOne)

⚠ This replaces the whole document except _id.


⭐ 7. Upsert (Update or Insert)

If the document does not exist → insert it.


⭐ 8. Full Example Program


 

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