By default, disable items if all items they are depending on have also been disabled

[KhumboLihonga]

Is your feature request related to a problem? Please describe.
Let's say there are 3 items - item 1, item 2 and item 3. Item 3 is enabled based on the response of item 2, and item 2 is enabled based on the response of item 1. Let's say item 1 is answered to enable item 2, and item 2 is answered to enable item 3. If the user decides to change item 1 in such a way that hides item 2, item 3 is still visible to the user.

Describe the solution you'd like
Since item 2 has been hidden, and item 3 solely depends on item 2, I expect item 3 to also be hidden.

Describe alternatives you've considered
The alternative is to make item 3 dependent on both item 2 and item 1 but this quickly gets complicated in bigger questionnaires.

Additional context
Here is a video showing this issue and the questionnaire that was used

Would you like to work on the issue?
Not sure who can look into this

[santosh-pingle]

yes, it should hide all dependent questionnaire items and clear the captured answers from questionnaire response.

[jingtang10]

Thanks for raising this @KhumboLihonga.

In some cases we might not want to clear answers to disabled questions, e.g.:

• disabled questions might still be used for other calculations?
• you might want to keep the input values in case the user re-enable the disabled questions

As a result, I'm not so sure this is the intended behaviour. I do feel this might have unintended consequences and I do want to keep as close to the standard as possible. We should double check with the SDC community first.

[KhumboLihonga]

@jingtang10 thanks for following up on this. Will be waiting to hear what the findings are.

[jingtang10]

please see the discussion here https://chat.fhir.org/#narrow/stream/179255-questionnaire/topic/Enablewhen.20dependency

to summarise:

• shouldn't need to change questionnaire
• we'll fix the library behavior to not use disabled answers
• we want to retain the answers that are temporarily disabled