FHIR Chat · Questionnaire enableWhen with answerString · implementers

Stream: implementers

Topic: Questionnaire enableWhen with answerString

Fran del Río (Jul 26 2021 at 15:45):

Hi all. What's the correct JSON format for "enableWhen" with answerString value in Questionnaire resource? Depends it of item type? Can you give an example?

It doesn't work form me:

  "item": [{
    "linkId": "1",
  "text": "Sub-Item",
  "type": "string",
  "enableWhen": [
    {
      "question": "4",
      "operator": "=",
      "answerString": "answerString example"
    }
  ]
  }]

the return through hapi was:

"type": "string",
"enableWhen": [
{
"question": "4",
"operator": "="
}
]

without answerString :(

Lloyd McKenzie (Jul 26 2021 at 17:18):

The syntax looks right to me (though using enableWhen with strings seems odd - hopefully you're constraining the allowed values with answerOption? @James Agnew - ideas what HAPI is doing here?

James Agnew (Jul 26 2021 at 17:23):

Looks right to me. What happens if you POST it to /Questionnaire/$validate?

Fran del Río (Jul 26 2021 at 18:22):

James Agnew said:

Looks right to me. What happens if you POST it to /Questionnaire/$validate?

Hi Lloyd & James. No errors about enableWhen, only some warnings about missing system in valueCodings.
I'm attaching example json used on $validate. Can you see something wrong?

Quest-enableWhen.json

James Agnew (Jul 26 2021 at 18:32):

I just uploaded that to the HAPI FHIR public server and it stores it correctly. See: http://hapi.fhir.org/baseR4/Questionnaire/EW#L52

Maybe check that you aren't using an outdated version of HAPI or the wrong version of the FHIR models?

Fran del Río (Jul 27 2021 at 15:23):

James Agnew said:

I just uploaded that to the HAPI FHIR public server and it stores it correctly. See: http://hapi.fhir.org/baseR4/Questionnaire/EW#L52

Maybe check that you aren't using an outdated version of HAPI or the wrong version of the FHIR models?

Thanks again.

Solved! I was returning a struct from my app to hapi, instead of a JSON string. Rarely were some labels omitted for this.

Last updated: Apr 12 2022 at 19:14 UTC