REST input validation in a Spring Boot Kotlin project

Input validation is important when developing a REST API. Thankfully Spring Boot has a starter dependency that makes the process straightforward. However if you are using Kotlin, there is pitfall that you need to be careful with. In this video we are going to a simple validation to a Kotlin project and also discuss the root cause of this pitfall. Link to source code: https://vladsave.com/?p=191 Link to video where I create the project: https://youtu.be/hAZ0m7Y3ewI My business website if you need to hire a freelancer: https://vladsave.com Chapters: 00:00 Introduction 00:26 Starter project 01:55 Add gradle dependency 02:41 Add the annotation 05:12 Explaining the root cause in Kotlin 07:50 Other validators