Fill in field based on answer in previous field

[VickiG]

Hello:  Relatively new Survey123 Connect User here.  First I want to say Thank You to this very helpful community.  You have answered so many questions for me already.  Hooray for bind::esri:fieldAlias, this saved me lots of frustration! 🙂

I am recreating an existing form for wildlife survey data collection.  We have a long term dataset and need to update the tech on the collection end.  

I have read many posts on how to populate a field based on the answer to a previous field and have tried several things.  What I want to do seems pretty simple, but I am not figuring it out.  

Basically the question is, did the animal you observe have marks (ear tags, radio collar)?  If the answer to field 'Marks' is None, I want to populate the following fields, left ear color, left ear shape, etc with None.

See the screen shot of what I have tried in the Relevant column.  I also put this expression in the calculation field.  But thus far, no luck.

Am I on the right track?  

Thank You

[Katie_Clark · Accepted solution]

Hi, I think this should work for you. It needs to be in the calculation column, not the relevant column.

if(${Marks} = 'None', 'None', '')

When using if statements, you need to provide the else condition as well (the third argument). In this case, it's just empty quotes so nothing happens if ${Marks} isn't 'None'.

Also, keep in mind that your expression needs to use the name of the choice, not the label. 

[VickiG · Accepted solution]

Hi Katherine:

That worked, I moved to calculations column and removed any extraneous spaces.

Thanks so much!