1. What is the problem? Be very detailed.
I can't figure out how to display only a subset of choices for a question restricted by a previous select_one response. Example:
Q1. Choose one of 3 restaurants (A,B,C)
Q2. What is your favourite dish in selected restaurant above?
Now restaurants A & B each offer only 3 dishes (d1, d2, d3) but restaurant C offers two more (d4,d5). If A or B is selected in Q1 how do I display only choices d1 to d3, OR if C is selected, all five dishes?
2. What app or server are you using and on what device and operating system? Include version numbers.
ODK Collect v1.26.3 on android
3. What you have you tried to fix the problem?
Not sure how to apply any of the functions or filter methods for this case.
choice_filter is what you need as @noel_cartong mentioned. here is a sample form that should help you because the construction should be similar: choiceFilter.xls (9.5 KB)
If it's not enough for you please attach your xls form.
Yes, use of choice duplicates works ok, thanks, but I wonder if there's an alternative way of getting the same results especially when the Hotels and dishes are many? e.g. 10 hotels and 100 dishes.
Of course the duplicates method would still work, but I'd need to make many more duplicates.