Node.js API Masterclass with Express and MongoDB - Mongoose Middleware & Slugify

The video tutorial explains Mongoose middleware, also known as hooks, which allow developers to perform operations before or after certain database actions. It covers different types of middleware, such as document, model, aggregate, and query middleware, and demonstrates how to create a Mongoose middleware to generate slugs using the slugify package. The tutorial also previews the next topic, which involves geocoding with Node Geocoder and the MapQuest API.

What is the primary purpose of Mongoose middleware?

• To hook into certain operations and manipulate data

• To enhance the performance of the database

• To manage user authentication

• To create a backup of the database

In Mongoose, what does the 'this' keyword refer to in document middleware?

• The entire database

• The current query

• The document being processed

• The middleware function

What is the difference between pre and post middleware in Mongoose?

• Pre runs after the operation, post runs before

• Pre runs before the operation, post runs after

• Both run simultaneously

• There is no difference

Why should you avoid using arrow functions in Mongoose middleware?

• They require more memory

• They do not support the 'this' keyword correctly

• They are slower than regular functions

• They are not compatible with Mongoose

What package is used to create slugs in the Mongoose middleware example?

• Slugger

• Slugify

• SlugIt

• SlugMaster

What is the benefit of using slugs in URLs?

• They reduce server load

• They make URLs more user-friendly and better for SEO

• They provide additional security

• They increase the speed of the website

How can you verify the middleware is working correctly in the example?

• By restarting the server

• By checking the console logs

• By using Postman to send requests

• By running a database query