dhis2-devs team mailing list archive

[Calle Hedberg <calle.hedberg@xxxxxxxxx>]

Abyot,

That is a generic question:

In general, I would say that a null value should not be accepted for a
yes/no field - if you want to store "unknown", then create a data element
with those three options (Yes, No, Unknown).

In practice, you can deal with it in two ways:
- use a default choice (preferably user-specified, otherwise typically No)
or
- not enabling the submit button if none of the radio buttons are ticked
(i.e. user cannot save the form without completing the choice between yes
and no).

That said, it might be TECHNICALLY feasible to simply leave the value blank
- it depends on what the underlying data type in e.g. PostgreSQL will
allow. For instance, if you ACTUALLY store a yes/no data type using an
integer data type that has been restricted to 0 or 1, then you can
obviously store a NULL value. So it depends on the data typing.

BUT, as I said above: fundamentally you use Yes/No for a phenomena that is
either Yes or No - and while the knowledge to determine which of them is
correct might be unknown (or it is not clear), you would/should usually
just determine a default value. In the case of "Driver's License", I would
use a default value of 0 (No).  For a data element like "All limbs present
and accounted for" I would us a default value of 1 - unless it is a
database only comprising amputees! :-)

Regards
Calle

On 8 April 2016 at 14:20, Abyot Asalefew Gizaw <abyot@xxxxxxxxx> wrote:

> Hi Calle,
>
> Thank you for reporting.
>
> I will fix for the display. We have three buttons because it allows to
> reset a value. What will happen if the question of "Driver's License" is
> not answered (neither yes nor no) ?
>
> --
> Abyot A. Gizaw.
> Senior Engineer, DHIS2
> University of Oslo
> http://www.dhis2.org
>
> On Fri, Apr 8, 2016 at 1:56 PM, Calle Hedberg <calle.hedberg@xxxxxxxxx>
> wrote:
>
>> Public bug reported:
>>
>> Using the latest version of 2.21 (8 April 2016), we have defined one
>> attribute called "Driver's License" as have data type Yes/No.
>>
>> In the Tracker Capture form, this attribute is showing up with scrambled
>> radio buttons:
>>
>> 1. There are three buttons instead of 2
>> 2. The words "value" and "yes" is displaying just underneath the radio
>> buttons.
>>
>> Screenshot has been sent to Abyot.
>>
>> ** Affects: dhis2
>>      Importance: Undecided
>>          Status: New
>>
>> --
>> You received this bug notification because you are a member of DHIS 2
>> developers, which is subscribed to DHIS.
>> https://bugs.launchpad.net/bugs/1567905
>>
>> Title:
>>   Tracker Capture - Attribute Yes/No display error
>>
>> Status in DHIS:
>>   New
>>
>> Bug description:
>>   Using the latest version of 2.21 (8 April 2016), we have defined one
>>   attribute called "Driver's License" as have data type Yes/No.
>>
>>   In the Tracker Capture form, this attribute is showing up with
>>   scrambled radio buttons:
>>
>>   1. There are three buttons instead of 2
>>   2. The words "value" and "yes" is displaying just underneath the radio
>> buttons.
>>
>>   Screenshot has been sent to Abyot.
>>
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/dhis2/+bug/1567905/+subscriptions
>>
>> _______________________________________________
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>>
>
>


-- 

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Calle Hedberg

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