Q1. What is Mongoose?
Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node.js.
It provides a schema-based solution to model application data, with built-in type casting, validation, query building, and middleware.
It simplifies MongoDB interactions and enforces structure while maintaining flexibility.
It provides a schema-based solution to model application data, with built-in type casting, validation, query building, and middleware.
It simplifies MongoDB interactions and enforces structure while maintaining flexibility.
Q2. How do you install and connect Mongoose?
Install:
npm install mongooseconst mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/mydb')
.then(() => console.log('Connected'))
.catch(err => console.error('Connection error', err));Q3. What are the advantages of using Mongoose over the native driver?
Mongoose provides:
• Schema definitions with data types and validation
• Middleware (pre/post hooks) for business logic
• Built-in casting and population for references
• Easier query syntax with chainable methods
• Default values and virtual properties
• Connection management and model abstraction
• Schema definitions with data types and validation
• Middleware (pre/post hooks) for business logic
• Built-in casting and population for references
• Easier query syntax with chainable methods
• Default values and virtual properties
• Connection management and model abstraction
Q4. What is a Mongoose model?
A model is a compiled version of a schema that provides an interface to a database collection.
Example:
Example:
const userSchema = new mongoose.Schema({ name: String });
const User = mongoose.model('User', userSchema);Q5. How do you handle connection events in Mongoose?
Mongoose connection emits events:
mongoose.connection.on('connected', () => {});
mongoose.connection.on('error', (err) => {});
mongoose.connection.on('disconnected', () => {});