The `create()` Function in Mongoose - onlinecode

The `create()` Function in Mongoose

The `create()` Function in Mongoose

In this post, we will give you information about The `create()` Function in Mongoose. Here we will give you detail about The `create()` Function in Mongoose And how to use it also give you a demo for it if it is necessary.

Mongoose models have a create() function that is often used to create new documents.

const User = mongoose.model('User', mongoose.Schema({
  email: String

const doc = await User.create({ email: '' });
doc instanceof User; // true; // ''

The create() function is a thin wrapper around the save() function.
The above create() call is equivalent to:

const doc = new User({ email: '' });

The most common reason for using create() is that you can conveniently save() multiple
documents with a single function call by passing an array of objects:

const User = mongoose.model('User', mongoose.Schema({
  email: String

const docs = await User.create([
  { email: '' },
  { email: '' }
docs[0] instanceof User; // true
docs[0].email; // ''
docs[1].email; // ''

With Sessions and Transactions for The `create()` Function in Mongoose

In addition to passing an array of objects, create() also supports passing in a single
object, or a spread of objects. For example, below is another way you can create multiple documents.

// Saves two new documents.
await User.create({ email: '' }, { email: '' });

The spread syntax unfortunately leads to syntactic ambiguity if you want to pass options to
the create() function, like if you want to use transactions. For example, the below code will attempt to create two documents, rather
than treating the 2nd parameter as an options object.

const session = await User.startSession();

await session.withTransaction(async () => {
  // Be careful, the below does **not** work! Instead of creating one document with the
  // associated session, it creates two documents with no session!
  await User.create({ email: '' }, { session });

Because of this, if you want to use create() in a transaction, you must pass the
documents as an array, even if you’re only creating one document.

const session = await User.startSession();

await session.withTransaction(async () => {
  // Creates one document with the given session. Note the '[]'!
  await User.create([{ email: '' }], { session });

Versus insertMany()

Models also have an insertMany() function that is syntactically similar to create().

const User = mongoose.model('User', mongoose.Schema({
  email: String

const [doc] = await User.insertMany([{ email: '' }]);
doc instanceof User; // true; // ''

The biggest difference is that insertMany() ends up as one atomic insertMany() command
that Mongoose sends to the MongoDB server, but create() ends up as a bunch
of separate insertOne() calls. While this means insertMany() is usually faster,
it also means insertMany() is more susceptible to slow trains. Because of this, we recommend using create() instead of
insertMany(), unless you’re willing to risk slowing down other operations to make your bulk insert fast.

Another difference is that create() triggers save()middleware, because create() calls save() internally. insertMany() does not trigger save() middleware, but it does trigger insertMany() middleware.

A mongoose is a small, carnivorous mammal that is found in Africa, Asia, and southern Europe. They are known for their ability to kill venomous snakes, and they have been used for centuries to control snake populations. Mongooses are also popular pets, but they can be difficult to care for and are not recommended for everyone.

Here are some of the pros and cons of owning a mongoose:


  • Mongooses are intelligent and can be trained to do tricks.
  • They are relatively small and easy to care for.
  • They can be effective at controlling snake populations.


  • Mongooses can be aggressive and unpredictable.
  • They are not legal to own in some places.
  • They can carry diseases, such as rabies.

If you are considering getting a mongoose as a pet, it is important to do your research and make sure that you are prepared to provide the proper care. Mongooses are not for everyone, but they can make great companions for the right people.

Here are some additional facts about mongooses:

  • They are about the size of a cat, with long bodies and tails.
  • They have sharp claws and teeth, which they use to catch and kill prey.
  • They are active during the day and night.
  • They eat a variety of foods, including snakes, rodents, insects, and fruit.
  • Mongooses live in a variety of habitats, including forests, grasslands, and deserts.
  • They are solitary animals, but they will sometimes gather in groups to hunt.
  • Mongooses are monogamous, and they mate for life.
  • Females give birth to litters of 2-4 young.
  • Mongooses reach sexual maturity at about 6 months old.
  • They have a lifespan of about 10 years.

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