Error when defining field choices dynamically in Otree 5.x

[razva...@gmail.com]

Hi,

I am trying to dynamically define the choices of a field in Pages.py. This works fine when using Otree 3.x but gives the following exception when running Otree 5.x:  Field uses a radio/select widget but no choices are defined. Thank you very much!

Razvan

[Chris @ oTree]

Can you show your code? It's working fine for me.

[razva...@gmail.com]

In models.py:

class Player(BasePlayer):

        choosen_number = models.IntegerField(

        label="Please choose your number for this period.",

        widget=widgets.RadioSelectHorizontal

    )

in pages.py:

class Choose_number(Page):      

    form_model = 'player'

    form_fields = ['choosen_number']

    

    def choosen_number_choices(self):

        choices = [1,2,3] #here I dynamically determine which numbers are available but I don't think that is relevant. I can post if necessary.

        return choices

 

I am running this fine with Otree 3.x but not with Otree 5.x.

Thanks!

Razvan

[Chris @ oTree]

You should move that method into the Player class; see here: https://otree.readthedocs.io/en/self/misc/version_history.html#new-format-for-form-validation

[razva...@gmail.com]

Thanks! it works now.