Unsure how to have certain form answers stop you from progressing to next page

[Henry Stowell]

I am having issues with how to use a consent form with "Yes I consent" and "No I don't consent" answers.

How can I use this form so that you can only progress to the next page by clicking "Yes I consent"

Thank you

[Chris Crabbe]

Hi Henry -

The way I would do this would be to implement the error_message method for that form field:  https://otree.readthedocs.io/en/latest/forms.html#field-name-error-message

Thanks,

--Chris

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[Henry Stowell]

I have edited and added said code from the documentation page but I still seem to be getting the same result. Participants are allowed to the next page even if they have selected the no consent option. My code is below:

Where am I going wrong? I am fairly new to Python so may be making some simple mistake here

[Chris Crabbe]

Hi Henry -

You're comparing player.consent, which hasn't been set any value yet when error_message is called.  You should compare to the "value" variable passed as an argument to error_message.

(I still absent-mindedly make this mistake sometimes after all these years, so don't feel bad about it).  Good luck!

Thanks,

--Chris

To view this discussion on the web, visit https://groups.google.com/d/msgid/otree/21f79447-7fb1-41e2-90c9-373d54134ee1n%40googlegroups.com.