insertMany method in MongoDB

Introduction

The insertMany method lets you add many records to a MongoDB collection at once. It saves time by inserting multiple items in one go instead of one by one.

When you have a list of new users to add to your app's database.

When importing a batch of product details into an online store.

When saving multiple sensor readings collected at the same time.

When you want to quickly add several blog posts to a content database.

Syntax

MongoDB

db.collection.insertMany([document1, document2, ...], { options })

The first argument is an array of documents (objects) to add.

The second argument is optional and can include settings like ordered to control behavior on errors.

Examples

Insert two user documents into the users collection.

MongoDB

db.users.insertMany([{ name: "Alice" }, { name: "Bob" }])

Insert products and continue even if one insert fails.

MongoDB

db.products.insertMany([{ item: "Pen" }, { item: "Notebook" }], { ordered: false })

Sample Program

This example switches to the shopDB database and inserts three product documents into the products collection.

MongoDB

use shopDB

db.products.insertMany([
  { name: "Chair", price: 25 },
  { name: "Table", price: 50 },
  { name: "Lamp", price: 15 }
])

Important Notes

If one document fails to insert and ordered is true (default), MongoDB stops inserting the rest.

Each inserted document gets a unique _id if you don't provide one.

Summary

insertMany adds multiple documents to a collection in one call.

It is faster and easier than inserting documents one by one.

You can control error handling with options like ordered.