#1 by Scott
Hi there, I have an app that needs repeating in the middle and the end of the experiment, so was trying to create abstract base classes for Player, Group and Subsession, however I get an error. (I'm using otree 5.8.0) __________________ Models.py: class SharedBasePlayer(BasePlayer): __abstract__ = True choice = models.StringField() class Player(SharedBasePlayer): pass ____________________ Error message: ... File "/home/s/.local/lib/python3.8/site-packages/sqlalchemy/util/compat.py", line 182, in raise_ raise exception AttributeError: Neither 'OTreeColumn' object nor 'Comparator' object has an attribute 'form_props' Thanks in advance Scott
#2 by BonnEconLab
Since you mentioned that the objective is to create “an app that needs repeating in the middle and the end of the experiment,” this may be of help: https://groups.google.com/g/otree/c/2Z3d_SStb5o/m/kEjHjBL_BAAJ.