We should be aware of whether our application is healthy. One way to do that would be to make various API requests to confirm it manually. It might not be the most elegant solution, though. The answer can be health checks. With them, we can verify if various aspects of our system work properly. Creating […]
As our application grows, more and more people start depending on it. At a time like this, it is crucial to ensure that our API works well. To do that, we could use a way to troubleshoot the application to detect anomalies and to be able to find their origin. This article serves as an […]
When we develop a REST API, there is a set of HTTP methods that we can choose from, such as GET, POST, and DELETE. A crucial thing to understand is that HTTP methods are largely conventional. It is our job to make them work in a way that’s consistent with the specification. For example, in […]
JavaScript MongoDB NestJS TypeScript
The bigger our database is, the more demanding our queries become in terms of computing power. A common way of tackling this problem is by creating indexes. In this article, we explore this concept and create indexes with MongoDB and Mongoose. When performing a MongoDB query, the database must scan every document in a given […]
JavaScript MongoDB NestJS TypeScript
When our application grows, so does the database. At some point, we might return a lot of data from our endpoints. It might prove to be too much for our frontend application to process, for example. Therefore, we might need to paginate our records by returning just a portion of them. This article explores different ways […]
JavaScript MongoDB NestJS TypeScript
While working with databases, keeping the integrity of the data is crucial. For example, imagine transferring money from one bank account to another. To do that, we need to perform two separate actions. First, we withdraw the amount from the first bank account. Then, we add the same amount to the second account. If the […]
JavaScript MongoDB NestJS TypeScript
In this series, we’ve used Mongoose to define properties in our schemas and work with models for documents. We’ve also defined various relations between collections. With Mongoose, we can also take advantage of virtual properties that are not stored in MongoDB. To understand them, we first grasp the concept of getters and setters. You can find the code […]
An essential thing about MongoDB is that it is non-relational. Therefore, it might not be the best fit if relationships are a big part of our database design. That being said, we definitely can mimic SQL-style relations by using references of embedding documents directly. You can get all of the code from this article in […]
So far, in this series, we’ve focused on working with SQL and the Postgres database. While PostgreSQL is an excellent choice, it is worth checking out the alternatives. In this article, we learn about how MongoDB works and how it differs from SQL databases. We also create a simple application with MongoDB and NestJS. You […]
An important part of designing a database is controlling the data we store inside. The most fundamental way of doing that is defining the types for our columns. With that, we can make sure that a particular column holds only text, for example. In this article, we use constraints to have even more control of […]