For an app form text field’s constraint, I want to do a case-insensitive comparison of two strings. I’m attempting to use lower-case(.) = lower-case(${variable}) and I’m seeing this error:
Could not evaluate: lower-case(.)=lower-case( /model/instance[1]/group_name/variable ), message: callNative() can't handle nodeset functions yet for lower-case()
We can do this with the ODK’s translate function.
translate(string, fromchars, tochars)
Returns a copy of
string, where every occurrence of a character infromcharsis replaced by the corresponding character intochars.
Using this function, we can convert both texts to lowercase, and compare them.
translate(${input}, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz')
