Using URL as a constraint

Need help
1

Hey guys,

I want to use the page URL as a part of a constraint.

When I do this in normal text it returns the five numbers I want

However I can’t seem to do this for a constraint

Do you know why this is? Any workaround is also appreciated.

Thanks in advance,
Artiom

2

My guess is that the type for ID Number is a number. The value returned when you truncate the URL is a string.

3

Any tips on making it work?