Hi, I recently asked a question about how to make a string question
required if previous answer = yes and make the constraint not accept any
answers if previous answer = no.
Mitch gave me the answer
"You would have to have two conditions, required, and constraint
required = "selected(${yq_q},'yes')" -- to make sure that the question
is answered if it is yes
constraint = "if( selected(${yn_q},'yes'),string-length(.) > 0,
string-length(.) = 0)" -- if the answer is yes, we have an
non-zero-length answer, otherwise, we have a zero-length answer"
Could any one tell me how to go about the same type of constraint for an
integer question? I've played around with regex but i still kind of suck.
Thanks!
The difficulty with integers is that there is no 'empty string' value for
an integer. So you would have to have some designated value (e.g., -1 or 0)
to indicate 'not answered'.
Once you designate a value, e.g., -1 as 'not answered' or 'not applicable',
then the contraint formula becomes
constraint = "if( selected(${yn_q},'yes'), . != -1, . = -1)"
ยทยทยท
On Tue, Jun 18, 2013 at 8:46 AM, Bill Olander wrote:
Hi, I recently asked a question about how to make a string question
required if previous answer = yes and make the constraint not accept any
answers if previous answer = no.
Mitch gave me the answer
"You would have to have two conditions, required, and constraint
required = "selected(${yq_q},'yes')" -- to make sure that the question
is answered if it is yes
constraint = "if( selected(${yn_q},'yes'),**string-length(.) > 0,
string-length(.) = 0)" -- if the answer is yes, we have an
non-zero-length answer, otherwise, we have a zero-length answer"
Could any one tell me how to go about the same type of constraint for an
integer question? I've played around with regex but i still kind of suck.
Thanks!
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Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com