IBM Watson Assistant: Condition for checking if input date is greater or less than 18 years old

Question

This is what happens:

The user is asked to enter their date of birth, identified with the variable [ $ date_bird ] to be extracted from the dialog with [ input.text ].

I need to verify that the date entered by the user is not greater or less than 18 years old.

Answer 1

Take a look at the IBM Watson Assistant supported expressions for date and time calculations .

Take the date of birth, add 18 years and check if it is before or after now.

You can use expressions in a condition on a node. However, I would probably evaluate the condition separately and set up a new context variable that indicates true / false on the "is over 18".

In the following example I have used this expression to decide on the age:

@sys-date.plusYears(18)<= today()

My test intent responds with old enough or too young , depending on the birthdate.