Calculated constrain.

[gap1981]

So i have a doubt about making somekind of dinamic or calculated constrain. I will put and example to make myself clear.

1. How many bicycles do you have at home?  Constraint: none    Answer: 5 

2. Of this bicycles how much of them are for kids? Constraint: 5 o less  Answer: 3

3. And how many are for adults?   Constraint: answer1-answer2   Answer:2

I hope i make myself clear. 

Thanks

[Prabhas Pokharel]

hi,

you can use something like:

name                    constraint

bicycles

bicycle_kids          . <= ${bicycles}

bicycle_adults       . <= ${bicycles} - ${bicycle_kids}

with the appropriate type/label/etc. in each of the fields.

. refers to the current question.

Hope that helps!

--p 

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Prabhas Pokharel
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[Prabhas Pokharel]

I have also put this example in the http://formhub.org/syntax/ page. Note the constraint_message column is optional, but I have added it for illustration.

[Guillermo Perazzo]

thanks it worked excelent!
Guillermo A. Perazzo

2012/4/17 Prabhas Pokharel <prabhas....@gmail.com>