Nest js: A Progressive Node.js Framework Book EVERYONE

Every website has a front end that the user interacts with and a back end that sends and retrieves data from the server. Developers who work on server-side frameworks build, design, and maintain the code, which makes data exchange possible. On the other hand, developers who work on front-end frameworks create feature-rich, visually appealing applications and websites.

Join the Ship It Club to receive updates on development trends, productivity tips, and gain early access to DevCycle events and giveaways, shipped once a month. Included in the libraries above is a dotenv module to load variables from a .env file. You will update this BlogModule with the required contents later in the tutorial.

Database Configuration

There are 3 main components of NestJS; controllers, providers, and modules. In this tutorial, you were able to successfully build an API using Nest.js and then persist data into your database using MongoDB. You went further to protect some of the endpoints with the application by ensuring and verifying the JWT (JSON Web Token) issued by Auth0. Here, you will start by installing and configuring Nest.js and then proceed to flesh out the structure necessary for the API. As pointed out earlier, in this tutorial, we will combine these awesome contemporary web tools and build an application with it. Nodejs is a Javascript framework that runs outside the browser, i.e to build server-side applications.

• There are 3 main components of NestJS; controllers, providers, and modules.
• An interceptor is a specialised set of middleware that lets you peek into the request that goes into the application.
• It brings design patterns and mature solutions to the Node.js development world.
• In this section, you have successfully installed the Nest CLI and leveraged it to generate the project for this tutorial.
• To begin, go back to the terminal where the application is currently running and stop the process with CTRL + C, then navigate back into the ./src/ directory and create a directory named blog within it.
• It is straightforward to integrate this library with a Nest application using the @nestjs/passport module.

It is built on top of the widely popular Node.js runtime and leverages its asynchronous, event-driven nature to provide a robust and reliable platform for developing web applications. We are seeking a Node.js Developer who will be in charge of overseeing the data transfer between the website and the users. As a Nest.js developer, your major intent will be on creating backend logic, establishing, and maturely managing the centralized database. NestJS had better TypeScript support and did the documentation for our engineering team. It was a more mature programming framework that allowed our engineers to easily have type definitions in our APIs. In addition, with APIs, our team liked exposing a new entity than they have in their model, and NestJS was good for class layers.

NestJS and PostgreSQL: A CRUD Tutorial

Run nest generate module /modules/users.This will automatically add this module to our root module AppModule. Nest.JS helps build lightweight, well-structured, and amazing microservices and helps evolve the technology stack. The microservice architecture enables the rapid, frequent, and reliable delivery of large, complex applications. Out-of-the-box tools and features make development, extension, and maintenance efficient.

I have heard a lot of great things from this backend framework called Nest.js but I hadn’t tried it myself. Now after a week of coding the API, having several endpoints, authenticating, connecting to a database, and stuff I will give you my honest review. Nest.js provides a layer of abstraction on top of Node.js, which means that it can leverage the features of Node.js as well as expose supercharged APIs for better performance and efficiency.

Read a single Post

The thing to note here is that the nest command above will create a blog.service.spec.ts file, which you can use for testing. It has also created a new blog.service.ts file, which will hold all the logic for this application and then communicate with the MongoDB database by adding and retrieving data from it. Lastly, it has also automatically imported the newly created service and added it to the blog.module.ts. Basic knowledge and previous experience with building web applications with React will help you to get the best out of this series.

Any random user can easily make an API call to retrieve or create a new post without authentication and succeed. This is not acceptable as the applications need to be smart enough to manage the identity of users. All the methods created above will help facilitate proper interaction with the MongoDB database from the backend API. You can now proceed to create the required routes that will handle HTTP calls from a front-end client.

Hello, nest!

This module uses the MongooseModule.forFeature() method to define which models should be registered in the module. Without this, injecting the PostModel within the BlogService using @injectModel() decorator wouldn’t work. From the preceding code snippet, you have marked each of the individual properties in the CreatePostDTO class to have a data https://wizardsdev.com/en/vacancy/middle-senior-nestjs-developer/ type of string and as read-only to avoid unnecessary mutation. Here you have successfully defined the types of data for a Post type as string values. This definition specifies that all fields will store and only accept string values. With this in place, the datatype of data that will be stored in the database will be properly controlled.

Nest.js has a moderate learning curve that depends on several factors. Nest.js may be easier to grasp if you are already familiar with JavaScript or TypeScript and have familiarity with backend development topics such as establishing APIs and handling data. Built on top of Express.JS, Nest.JS offers multiple functionalities and out-of-the-box APIs. Developers can leverage the features of Nest.JS to build applications with less code. With this how-to you will be up and running, creating your own Nest.js apps in no time. If you’re looking to get started using feature flags to ensure software development best practices, start your free trial account with DevCycle.

It allows you to be more productive by building JavaScript applications in a JSON format, making it not strange to any JavaScript developer. It supports arrays and nested objects values and allows for flexible and dynamic schemas. It is often used with Mongoose, an Object Data Modeling (ODM) library, that helps to manage relationships between data and provides schema validations. Runnest g service /modules/posts.This will automatically add this service to the Post module. Run nest generate service /modules/auth.This will automatically add this service to the Auth module. Now, let’s import the database module into our app root module to make it available to all our services.

You can peek into the request either before it reaches the controller or after the controller is done with the request before it gets to the client-side as a response. The post just presents the fundamental steps required to start such a project. It actually will guide you to the point you will think that the next phase is to add some persistence to the project using a database, like MongoDB, PostgreSQL, MySQL/MariaDB, Oracle, MS SQL Server, etc.