From the course: Mastering Nest.js: Build Scalable Applications with Mastery in Nest.js Framework

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Understanding controllers

Understanding controllers - Nest.js Tutorial

From the course: Mastering Nest.js: Build Scalable Applications with Mastery in Nest.js Framework

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Understanding controllers

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Controllers are considered as one of the most important and crucial fragments in NestJS. As controllers are responsible for handling incoming HTTP requests and returning responses back to the client. Controllers not only manage incoming HTTP requests, but also contain the logic for handling specific routes. There can be multiple controllers handling multiple HTTP requests at the same time. The routing mechanism of the controller controls which request should be passed to a specific controller. Each controller has more than one route and different routes perform different actions. Let's understand the controller syntax and implement a simple example. So here we have the controller decorator which handles the HTTP request. We can mark any class as controller by specifying the add controller, that is, the controller decorator. Inside the class, there is a get decorator to handle the HTTP GET requests. The controller decorator takes a string argument, which basically acts as a route path…

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