Multiple comparison in constraint

Support
,
1

Using XLSForm,
I'm trying to constrain the upper and lower bounds of an integer.

I have tried:

20 <= . <= 200

This produces no error at conversion time, but the constraint doesn't work in the form. (The field accepts any value.)

. >= 20 and . <= 200
(. >= 20) and (. <= 200)

These both produce an error at conversion time:

org.javarosa.xform.parse.XFormParseException: bind for ${diastolic_bp} contains invalid constraint expression [. >= 20 and <= 200] Bad node: org.javarosa.xpath.parser.ast.ASTNodeAbstractExpr@7fbe847c
----
org.javarosa.xform.parse.XFormParseException: bind for ${diastolic_bp} contains invalid constraint expression [(. >= 20) and (<= 200)] Bad node: org.javarosa.xpath.parser.ast.ASTNodeAbstractExpr@7fbe847c

PS: I'm aware I could use a range widget for this purpose. But the form is just an example I'm working on for illustrating constraints. So it would be good to know why this isn't working.

2

Hi Adam,

How about :
((. > 20) or (. = 20)) and ((. < 200) or (. = 200))
or possibly the following - give you said this is integer arithmetic
(. > 19) or (. < 201)

3

Hi Adam,

Could you send an example of the form? I can't reproduce the errors when converting (I am using the offline converter of XLSForms)

4

UGH

I just realized I HAD A TYPO.

I missed the dot on the second comparison.
(It was correct in my explanation above, but you can see it is missing in the error message. That's how I actually had it in my form.)

This works just fine, as expected:

. >= 20 and . <= 200

Thanks, all.

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