I have observed unexpected behavior for isusernametaken function. When we pass a

chetany

A Score Level 1

over 9 years ago

I have observed unexpected behavior for isusernametaken function. When we pass an empty string to it, it returns true.
As per my understanding this should not be the case. isusernametaken should return true for only the users which exist (activated/deactivated) in the system. This was observed on Appian 7.11
fn!isusernametaken("") - true

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0 Stefan Helzle
A Score Level 3
over 9 years ago

I think this will not change as the behaviour of some older Appian functions is not consistent in some edge cases but running systems depend on this. Just try "=not(null)" and "=if(null, true, false)". So my suggestion is to wrap isusernametaken() this in an expression which does some additional checks.
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0 Stefan Helzle
A Score Level 3
over 9 years ago

I think this will not change as the behaviour of some older Appian functions is not consistent in some edge cases but running systems depend on this. Just try "=not(null)" and "=if(null, true, false)". So my suggestion is to wrap isusernametaken() this in an expression which does some additional checks.
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