We can’t cut corners on certain aspects of web development, and storing monetary values is one of them. In this article, we explore various data types in PostgreSQL we could use and discuss which ones to avoid. The drawbacks of floating point numbers When thinking about money, we often have to deal with fractions – […]
Database normalization is a key part of database design, but it’s often explained in complicated terms. In this article, we’ll break down the normalization rules and provide down-to-earth examples using Drizzle ORM and PostgreSQL. Database normalization aims to avoid unnecessarily duplicating our data and make it easier to manage. It does that through specific rules […]
Managing relationships between the tables in our database is one of the fundamental aspects of using SQL. When a particular table points back to itself, it creates a recursive relationship. In this article, we learn what the recursive relationships are and how to work with them using the Drizzle ORM and PostgreSQL. We sometimes refer to […]
It’s not uncommon for a single table to be related to multiple similar tables. A good example is a comment the user can write under a photo, an article, or an audio file. A possible approach would be to create a separate table for each type of comment, such as PhotoComment or ArticleComment. Unfortunately, this […]
All rows in our database need unique identifiers, typically a sequence of numbers. Alternatively, we can use Universally Unique Identifiers (UUID). In this article, we explore the pros and cons of UUIDs and show how to implement them in a project that uses NestJS, PostgreSQL, and the Drizzle ORM. Introducing UUIDs At this point, we’re […]
Writing tests for our application helps ensure it works as intended and is reliable. So far, we have written unit tests for our NestJS application that uses the Drizzle ORM. Unit tests help us check if a particular class of a single function functions properly on its own. While unit tests are important, they are […]
Unit tests play a significant role in ensuring the reliability of our NestJS application. In this article, we’ll explain the concept behind unit testing and learn how to apply it to a NestJS application with the Drizzle ORM. Introduction to unit tests Unit tests allow us to verify that individual parts of our codebase function […]
Debugging is a great way to find issues when running an application locally. Unfortunately, we don’t have this option in a deployed application. Because of that, implementing logging functionality is necessary to track down and investigate any potential problems. In this article, we learn how to use the logger built into NestJS and integrate it […]
Sometimes, in our application, we would like to define a specific duration of time. We could represent it as a number of seconds, for example. However, we might want to be more flexible and be able to use various units, such as minutes, hours, days, or weeks. In this article, we learn how to achieve […]
As our database grows, focusing more on its performance is important. SQL indexes act as guides within the database, helping to speed up data retrieval. In this article, we cover how to create indexes using PostgreSQL, Drizzle ORM, and NestJS and explain what indexes are. Why we might need indexes In the previous parts of […]
