So I'm using a sequence to allow the user to input qr code data (using a
scanner). There's a lot of variability in terms of exactly how many rows
I'll need (enough so I don't want to have a precursor page specifying the
number, as that would require the user to count items rather than just
start scanning them.
Initializing the form with X rows is trivial. Assuming the name of my
sequence node is 'qrcodes', I can just render the form with
form.render(appstruct={'qrcodes':
['']*X})
However if I don't know ahead of time how many rows I'll need, the user
will at some point have to add rows. How do I get one of the behaviours
below (top-most is most preferred):-
1. As user scans one qrcode and presses 'enter', a new row is automatically
created. This breaks 'enter-to-submit', but that's okay for this case.
2. When user clicks on 'add new qr code' (the automatic javascript button
which adds new items to the sequence, add a fixed number of rows (say 5)
rather than just 1 as is currently the case.
My fallback if none of the above works would probably be to pre-fill about
50 'empty' rows and just discard what I don't need. That would suck on
mobile though, having to scroll all the way down, but as usage is primarily
desktop in this case that won't matter too much.
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