How many types of validations exist in OutSystems?

In OutSystems, there are three main types of validations that developers can utilize to ensure that the data is consistent, accurate, and meets specific criteria. Understanding these three types helps maintain data integrity and improves user experience within applications.

The first type is client-side validation, which occurs on the user's device before the data is sent to the server. This type of validation can provide immediate feedback to users, enhance performance, and reduce server load by catching errors early.

The second type is server-side validation, which takes place once the data is received on the server. This is crucial because it acts as a second layer of verification to ensure that the data adheres to business rules and constraints even if the client-side validation is bypassed or manipulated.

The third type involves database validation. This includes constraints and triggers defined at the database level that enforce rules directly in the database schema, ensuring that any data persisted meets specific criteria regardless of how it was submitted.

By having these three types of validations, OutSystems allows developers to build robust applications with layered security and data integrity, reducing errors and improving overall reliability. Therefore, recognizing that three types of validations exist is essential for any developer working with the OutSystems platform.