The HTTP is a protocol allowing you to fetch resources such as JSON data and HTML documents. Two sides of the connection, the client and the server, communicate by exchanging messages. The message sent by the client is a request. The message sent by the server is a response. When using Node.js, you can act like either one […]
An essential part of developing a fully functional software is testing. In this article, we focus on making our application more testable and implementing unit and integration tests using Jest and a library called SuperTest. This part of the TypeScript Express testing tutorial needs some basic understanding of tests and the knowledge of tools like […]
In this article, we go through migrations, which is a significant thing when working with Postgres. We learn what they are and the basics of how to write them. Although the knowledge of SQL is useful here, we also learn how to have them auto-generated for us with the help of TypeORM CLI and how […]
Today we continue using Postgres with Express and Typescript. Relationships are an essential part of working with Postgres, and therefore we cover it today. To handle it we use TypeORM. The code for the tutorial is in the express-typescript repository in the postgres branch. Feel free to give it a star. TypeScript Express Postgres Relationships When […]
Today our tutorial takes a bit of a turn as we look into relational databases, Postgres in particular. In this article, we go through setting up an environment with Express Postgres. We also set up the pgAdmin platform so that we get an overview of our database. In the upcoming parts of the tutorial, we focus on […]
With MongoDB aggregation, we can process data and get computed results. Thanks to that, we get additional information about the documents in our collections. You can use it to perform some tasks on the data and let the MongoDB handle it for you. In this article, we create an endpoint that gives us a report […]
Today we dive into MongoDB relationships between documents. To do it we use Mongoose and the populate feature. As always, the code that we cover here is available in the express-typescript repository. You’re welcome to give it a star. MongoDB relationships between documents The fact is that MongoDB is a NoSQL database. It means that it […]
Today we cover an essential part of almost every application: registering users and authenticating them. To implement it, we use JSON Web Tokens (JWT). Instead of getting help from libraries like Passport, we build everything from the ground up to get the best understanding of how it works. As always, all of the code is […]
Since not always everything goes perfectly, you need to expect the unexpected. To prepare for that, we cover TypeScript Express error handling and incoming data validation. Just as before, the repository for the tutorial is mwanago/express-typescript. If you find it helpful, feel free to give it a star. Express Error handling In the previous part of the […]
In this part of the Express TypeScript tutorial, we cover using a MongoDB database. To do that properly, we also learn the concept of environment variables. Since we follow the MVC pattern, we introduce the idea of a model. Just as in the previous part of the tutorial, all of the code from this part […]
