npm install @payk/class-validator-extras
The decorator needs to define a function that receives two values, an object of the current class and the value of the current property. It needs to return a boolean. You can also pass the options object and override the message for your usage.
class MyClass {
startDate: Date;
@ValidateWithCondition((obj: MyClass, val: Date) => val > obj.startDate, { message: 'ExpirationDate must be after the StartDate' })
expirationDate: Date;
}