Introduction
Explore the importance of integrity constraints for maintaining consistent and valid data in front-end web applications. Understand how to define constraints centrally and apply responsive validation in the user interface and model layers. This lesson helps you build more robust JavaScript applications by preventing invalid user input and ensuring data integrity throughout the app.
We'll cover the following...
Why we need integrity constraints
In order to detect non-admissible and inconsistent data, and to prevent such data from being added to an application’s database, we need to define suitable integrity constraints. These constraints can be used by the application’s data validation mechanisms to catch cases of flawed data. Integrity constraints are logical conditions that must be satisfied by the data entered by a user and stored in the application’s database.
For instance, if an application is managing data about persons including their birth dates ...