Unsupported locale setting only at Heroku

Question

I just have pushed my project to heroku and suddenly I am getting the following error:

/profile/list/48
unsupported locale setting
Error during template rendering
In template /app/Clientes/templates/Clientes/base.html, error at line 0

The thing is that I am running this project without any problems localy and in Heroku the error appears in a detail view.

I do not think that the problem is located in any of my files, but if requested I can post it here.

Answer 1

heroku-buildpack-locale says

In order to reduce the stack image size, the heroku 16 stack doesn't include language packs by default. You may still want to use a custom language pack though.

You can add the heroku-buildpack-locale buildpack by running

heroku buildpacks:add --index 1 https://github.com/heroku/heroku-buildpack-locale

Then create a new .locales file in the root of your repository containing

pt_BR.UTF-8

commit it and push to Heroku. This should let you use the locale.

Answer 2

After I had the following code inside my filter file:

locale.setlocale(locale.LC_ALL, 'pt_BR.UTF-8')

The solution is given by Chris in this post.