Expression - If for Compose + Join

[YAMess]

I'm using compose and join to display optional answers from 2 questions in form but I can't get the flow to work if there is null (no answers).

I'm not to sure how to write the expression  - currently using contains but should i be using coalesce?

My expressions are as follows:

Compose1

if(contains(triggerOutputs('Get_response_details')?['body/r8d6acc68f2dd4b9fa1290c575d4cac19'], triggerOutputs('Get_response_details')?['body/re36471ebb5764466b7bc5c3392d10739'], null))

Join1

json(outputs('Compose1'))

Any help is appreciated 🙂

[v-yujincui-msft · Accepted solution]

Hi @YAMess ,

Do you want to concatenate the answers to the two optional questions with two newline labels?

I have made a simple test for your reference.

if(empty(Question1),null,Question1)

if(empty(Question2),null,Question2])

if(or(empty(Question1),empty(Question2)),replace(outputs('Compose'),'</br></br>',''),outputs('Compose'))

Result Screenshots:

Best Regards,
Charlie Choi