Hello,

I do not want the participants to see the debug info. The documentation indicates that I need to set the OTREE_PRODUCTION variable, but I'm unsure where and how to set this variable. I need your help with this. 

Additionally, I want to record the time participants spend on a page, and the documentation also provides a Python package for this purpose. Can this package be used directly, or do I need to make some additional settings? 

Thank you very much for your assistance.

Hi!

If you are using Heroku, go to your App Dashboard’s “settings”, click on "Reveal Config Vars", and add or update a new key, value pair with "OTREE_PRODUCTION" and "1".
It is a little curious that this is not in the docs (at least I could not find it).

If you run a session (or demo) and afterwards navigate to "Data" in the top menu, you should find a Page Times entry at the bottom. You can download the data and process it with the script provided in the docs.

Best
Christian

OTREE_PRODUCTION is an environment variable. When using Linux you could set it, for instance, by including the line

export OTREE_PRODUCTION=1

in your .bashrc file.

You can, however, also set it locally by including 

DEBUG = 0

in your settings.py file.

Regarding the time spent on each page, I would suggest recording the times by including code like the following in your __init__.py file:

import time

class Player(BasePlayer):

    trial_onset = models.FloatField()
    trial_offset = models.FloatField()
    trial_duration = models.FloatField()

class NameOfYourPage(Page):

    @staticmethod
    def vars_for_template(player):
        player.trial_onset = time.time()

    @staticmethod
    def before_next_page(player, timeout_happened):
        player.trial_offset = time.time()
        player.trial_duration = player.trial_offset - player.trial_onset

Beware, however, that vars_for_template is executed each time anew when a participant refreshes the page. Therefore, this method is only valid if the participant does not refresh the page after.

Thus, for robustness, you might prefer to include something like

    @staticmethod
    def before_next_page(player, timeout_happened):
        player.next_page_onset = time.time()

in the class of the *previous* page.

Hello,

Thank you very much for your help. I have resolved the issues with debugging and recording the time spent on pages.

I didn't use Heroku; setting DEBUG=0 in the local settings file was a great solution. 

I found pagetimes.py in the documentation.  https://otree.readthedocs.io/en/latest/admin.html with Export Data.

Thank you once again for your assistance.

Best wishes!