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.

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