Conditional constraits

Support
1

Hi there!

I wonder if it is possible to use conditional constraints. Is the correct
syntax "If(condition,true, false)"?? or is it only for 'calculate'??
I want to limit the constraint only to one option from a previous selec_one
Any help???
Thanxs a lot

2

Yes, you can use expressions that evaluate to a boolean value for any of
the:

(1) constraint
(2) relevant

fields.

··· On Thu, Jan 12, 2017 at 1:29 AM, Borja Puig wrote:

Hi there!

I wonder if it is possible to use conditional constraints. Is the correct
syntax "If(condition,true, false)"?? or is it only for 'calculate'??
I want to limit the constraint only to one option from a previous selec_one
Any help???
Thanxs a lot

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Mitch Sundt
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University of Washington
mitchellsundt@gmail.com

3

Thank you Mitch,

And the condition for true can be a equation aswell?

Aggregate tells me that the syntax of the expression is wrong, and I dont
know really why... any guess?

the expression is:

if( selected(${activity_com_act}, 'awareness'), . =
(${females_5}+${females_5_17}+${females_18_49}+${females_50}+${males_5}+${males_5_17}+${males_18_49}+${males_50},
. >= 0))

thank you very much

··· 2017-01-12 22:41 GMT+02:00 Mitch Sundt :

Yes, you can use expressions that evaluate to a boolean value for any of
the:

(1) constraint
(2) relevant

fields.

On Thu, Jan 12, 2017 at 1:29 AM, Borja Puig borpuig@gmail.com wrote:

Hi there!

I wonder if it is possible to use conditional constraints. Is the correct
syntax "If(condition,true, false)"?? or is it only for 'calculate'??
I want to limit the constraint only to one option from a previous
selec_one
Any help???
Thanxs a lot

--

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Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com

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4

Your parentheses do not match up. You need a close-paren before the last
comma, and only one trailing close paren.

··· On Fri, Jan 13, 2017 at 2:16 AM, Borja Puig wrote:

Thank you Mitch,

And the condition for true can be a equation aswell?

Aggregate tells me that the syntax of the expression is wrong, and I dont
know really why... any guess?

the expression is:

if( selected(${activity_com_act}, 'awareness'), . =
(${females_5}+${females_5_17}+${females_18_49}+${females_50}
+${males_5}+${males_5_17}+${males_18_49}+${males_50}, . >= 0))

thank you very much

2017-01-12 22:41 GMT+02:00 Mitch Sundt mitchellsundt@gmail.com:

Yes, you can use expressions that evaluate to a boolean value for any of
the:

(1) constraint
(2) relevant

fields.

On Thu, Jan 12, 2017 at 1:29 AM, Borja Puig borpuig@gmail.com wrote:

Hi there!

I wonder if it is possible to use conditional constraints. Is the
correct syntax "If(condition,true, false)"?? or is it only for
'calculate'??
I want to limit the constraint only to one option from a previous
selec_one
Any help???
Thanxs a lot

--

Post: opendatakit@googlegroups.com
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Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com

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Mitch Sundt
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University of Washington
mitchellsundt@gmail.com