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example of using radiogrid in BigFive questionnaire in oTree
Hi Philipp,
I want to use RadiogridField in one of my survey pages. However, when I copy and paste bigfive as an example in one page of my app and run "otree devserver", I've got the following error message:
An error occurred.
You may have added a non-nullable field without a default. This typically happens when importing model fields from django instead of otree.
(For technical details about this error, run "otree devserver --verbosity=1")
and when I run "otree devserver --verbosity=1", it returns SystemExit: 3
. May I ask you what the problem is? My oTree version is 2.5.7. When I run the original bigfive app placed in the same project folder, it runs without any problem.
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