Introduction to MongoDB collection.insertMany() Method

MongoDB is a popular NoSQL database that uses documents to store data instead of tables. The insertMany() method in MongoDB is used to insert multiple new documents into a MongoDB database.

Syntax

The syntax for the MongoDB insertMany() method is as follows:

db.collection.insertMany(documents, options)

Here, db.collection is the name of the collection where data will be inserted, documents is an array of documents representing the multiple documents to be inserted, and options is an optional parameter used to specify insertion options.

Use Cases

The insertMany() method is used in the following scenarios:

  • Inserting multiple new documents into a collection.
  • Automatically creating a collection if it does not exist.
  • Inserting multiple new documents into a collection if it already exists.
  • Failing to insert if a document with the same _id value already exists in the collection.

Examples

Here is an example of using the insertMany() method to insert multiple new documents:

db.users.insertMany([
  { name: "John", age: 30, email: "[email protected]" },
  { name: "Sarah", age: 25, email: "[email protected]" },
  { name: "Bob", age: 40, email: "[email protected]" }
])

This will insert three new documents into the users collection, each containing the name, age, and email fields.

Here is an example of using the insertMany() method with options to insert multiple new documents:

db.users.insertMany(
  [
    { name: "John", age: 30, email: "[email protected]" },
    { name: "Sarah", age: 25, email: "[email protected]" },
    { name: "Bob", age: 40, email: "[email protected]" }
  ],
  { ordered: false }
)

This will insert three new documents into the users collection and use the { ordered: false } option to indicate that insertion should not stop if errors occur during the process.

Conclusion

The insertMany() method is a convenient way to insert multiple new documents into a MongoDB database, including inserting multiple documents into a collection. Additionally, if the collection does not exist, it will be automatically created. If a document with the same _id value already exists in the collection, the insertion will fail.