Model

Learn CRUD operations with Mongoose Model.

What is a Model?

A Model is a document class built from a blueprint. You do database operations (create, find, update, delete) through this class. The Model is Mongoose's most-used API.

Creating a model: const User = mongoose.model("User", blueprint). The first parameter is the collection name (pluralized), the second is the blueprint. After creating you make documents with new User({...}) and query with User.find().

Creating a model

To create a model you call mongoose.model(name, definition). name sets the collection name (Mongoose auto-pluralizes: "User" becomes "users"). definition is the blueprint object.

You define a model once; then you use it everywhere in the app. Defining the same name twice throws an error. The model lives in memory; you do not need to require it again. This is Mongoose's singleton pattern.

Exercise Log the type of the model

Import mongoose. Create a model with mongoose.model("User", { name: String }). Log typeof User.

Show example solution

const mongoose = require("mongoose");
const User = mongoose.model("User", { name: String });
console.log(typeof User);

Test yourself

Match each piece to its role

mongoose.model

Creates a model
Model

Document class
new Model()

New document
Model.find()

Finds documents

Complete the method name

const User = mongoose.____("User", { ad: String })

Show answer

const User = mongoose.model("User", { ad: String })

What does mongoose.model() return?
- Bir dize
- A number
- A Model class
- Bir Promise
Show answer

A Model class — mongoose.model() returns a Model class.

Next lesson: Query

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