string-length expression on decimal value returns 0

Question

Hello,

I'm trying to use an expression to evaluate if a decimal field is empty or not in Survey123. I have found this option :

(string-length(${latitude}))>0

Unfortunately, this returns the "string-length(${latitude})" portion of this expression returns a value of 0 whenever I try to enter a decimal value.

Example: decimal not working

example: integer works

I have tried these altenatives without sucess:

* (string-length(number(${latitude})))>0
* (string-length(number(${latitude})))>0.0
* ${latitude} != 'NaN'

Can anyone help me finding a way to identify empty decimal fields ?

Kind regards,

Anne-Marie

Anne-MarieDubois · Answer

Still same issue. It only works for integers.

DeonLengton · Answer

Hi

Try first converting it to a string and then checking it's length:

string-length(string(${latitude}))=0

Anne-MarieDubois · Answer

That doesn't work either. The thing is is that the available expressions don't seem to make a diffrence between an empty field OR a decimal field.