Modern Full-Stack Development with Nest js, React, TypeScript, and MongoDB: Part 1

Once the editing of the above file is completed, you have now successfully set up a database connection for your application by using the Mongoose module for MongoDB. In this section, you have successfully installed the Nest CLI and leveraged it to generate the project for this tutorial. You then proceeded to run the application on the default port 5000. Next, you will work on ensuring a successful connection between your app and its database that will be created. You will start by using the command-line interface built specifically for scaffolding a new Nest.js application to create yours.

Nest.js developer

We extract and inject the id using the @Param() decorator and we call the delete() method of ContactsService. If you’re an Angular developer, the concept of Nest Service Provider sounds familiar to you and resembles the same concept of providers in Angular. This is a utility function that maps a TodoEntity into a TodoDto.

Generating our user management resources

In other words path params in @Get and in @Render should be the same. API endpoints must not have this interceptor – we do not want to return path params back when calling API. Still even if you were to bare with the spaghetti facilitated by global application access from different contexts you would end up missing the HTTP contexts when calling services.

  • After implementing the service that wraps the necessary CRUD operations of our application, let’s now create the endpoints.
  • Every webpage includes a document object model (DOM) that represents the page’s content in an organized form using HTML.
  • For example, if you request the URL GET /todo, Nest routes this request to a designated Controller class, typically, the TodoController class.
  • This is because it is about three times more efficient and faster than NPM, and with a speedy cache system, PNPM is also faster than Yarn.
  • One of the most popular libraries for accessing the Mongo database is Mongoose.
  • The tsconfig.json file is a file written in JSON (JavaScript Object Notation) that defines TypeScript-related options required to compile the Nest app.
  • How this will work is that once a user is authenticated by Auth0, an access token will be generated for such user to make API calls subsequently.

You can easily connect to the MongoDB database and use it to build scalable applications using the NestJS Mongoose package. Nest includes an exceptions layer that is responsible for handling all unhandled exceptions across an application. When an exception is not handled by your application code, it is caught by this layer, which sends an appropriate user-friendly response automatically. In the code above, we used @UseGuards and @Roles decorators for the three methods. This instructs the app that a customer must be logged in and must have a user role assigned to add or remove products.

Setting Up Controllers

With over 46.6k stars and 5.4k forks on GitHub, and a weekly download count of up to 700,000, the framework is a popular go-to for crafting out your backend project with Node.js. Nest.js, on the other hand, was built to offer solutions to code structure and code organization strategy problems. It combines modern and modular approaches to software engineering principles.

Finally, we added LocalStrategy and JwtStrategy in the providers array. In the code above, we added UserModule, PassportModule, and JwtModule in the imports array. The code above gives us a user validation method, which retrieves the user and verifies the user’s password. The commented code towards the end of the block will be used when we implement user authorization.

Returning Status Code

We also switched the execution context to HTTP with switchToHttp() to get the user details using getRequest(). Now we have a basic structure for the NestJS ecommerce store product feature. Having robust architecture gives you the ability to build highly scalable, testable, loosely coupled, and easy-to-maintain applications. Using Nest enables you to take your Node.js backend to the next level. You can now, use a REST client to send requests to your REST API CRUD server. We use the @Delete() decorator to create and endpoint that accepts a DELETE request.

In this tutorial you took a quick look at the fundamentals and basic building blocks of Nest.js and then built a RESTful API. Next, you created two different methods named getBooks() and getBook() to retrieve the list of books from the mock data and to fetch just one book using the bookID as a parameter. This will give you access to the nest command for project installation and other project specific commands. As stated earlier in this post, you will create a sample application that will help you get a good grasp on some of the core concepts of Nest.js. Nest.js was structured in a way that the routing mechanism is able to control which controller will be responsible for handling a particular request. Log in and add your token since creating a post route is a protected route.

Building the NestJS backend

I’ll keep the app simple so that there’s enough time to explore a variety of features available in the framework. We need to start the development server to ensure everything is working properly before deploying to a live production server. Here, we’ll list different reasons to select Nest.js as your Node.js framework for upgrading or building your next project. Let’s create a VideoList component to display the videos to users.

Nest.js developer

When a GET request is sent to the /contacts endpoint, Nest will return an HTTP response with the 200 status code and the This action will return contacts string. Developers must install the official documentation, and official CLI from NPM packages to start. Adding code is easy as Nest.JS takes care of the security measurements for you. Multiple processes are present to add third-party operators and plugins to the Nest framework.

This was generated by the command and the module has also been added to the app.module.ts which happens to be the root module of the application. Each Nest.js application must have at least one module, usually referred to as the root module. This root module is the top-level module and usually enough for a small application. It is advisable to break a large application into multiple modules as it helps to maintain the structure of the application.

In this case it’s the empty path which will make our action available from the /contacts endpoint. Nest.JS is also highly configurable with ORMs like TypeORM, which developers can use to work with databases. Features like Active Record and Data Mapper pattern developers can now leverage easily.