The topic seems to have been discussed in the past, but not sure it was as per the terms I am facing today. So I am sort of re-opening it.
Let's say I have a village, and there are various farmers in that village. I know them, that is the farmers are listed in my "choices" sheet of the xls I use to prepare my form for collection.
I "begin_group", the "appearance" is a field-list, and now use a "select_one" that is I select one of the farmers, let's say Mr. John, and once done I have say 2 questions related to that farmer.
When I am done with the farmer, I reach on the mobile app / ODK collect the option to save, and then to send the saved form. Fine.
Now I need to do the same for a second farmer of that same village. The fact is that Mr. John appears in the list of possible farmers, so there is a risk that I select again Mr. John when in fact I am currently talking with Mrs. Maggie.
Is there a way to prevent selecting again Mr. John once the questionnaire pertaining to him was completed?
In advance, thank you.