From the course: Mastering Nest.js: Build Scalable Applications with Mastery in Nest.js Framework

Unlock this course with a free trial

Join today to access over 25,200 courses taught by industry experts.

Validating dates in Nest.js

Validating dates in Nest.js - Nest.js Tutorial

From the course: Mastering Nest.js: Build Scalable Applications with Mastery in Nest.js Framework

Start my 1-month free trial Buy for my team

Validating dates in Nest.js

“

To validate dates, the class validator library provides the isDate validator, which checks if the value is an instance of the date object. It requires the value to be a valid JavaScript date object. Let's check an example. Below the country field, I'll give the date of birth field that is DOB, which will be of type date. And I will apply the is date validator on the field. Now let's go to the postman. I'll give the date and make a request. It shows that the DOB field should be of date instance. This is because the isDate validator expects the DOB property to be a JavaScript date object. This error occurs when the validation process encounters a value for DOB that is not an instance of the date object. This is where the class transformer library is used. It offers various transformation decorators that help transform the values to a valid format. For instance, here we can use the type decorator. It specifies a type of the property. It takes a function as an argument. And as we want a…

Contents