Support for Django template engine subclasses

https://github.com/divio/django-cms/blob/release/3.4.x/cms/utils/setup.py#L21

    try:
        django_backend = [x for x in settings.TEMPLATES
                          if x['BACKEND'] == 'django.template.backends.django.DjangoTemplates'][0]
    except IndexError:
        raise ImproperlyConfigured("django CMS requires django.template.context_processors.request in "
                                   "'django.template.backends.django.DjangoTemplates' context processors.")

This is insane! You forbid usage of customized engines.

Why don’t you check if django.template.context_processors.request is in the list of context_processors instead?

    if 'django.template.context_processors.request' not in x['OPTIONS']['context_processors']:
         raise ImproperlyConfigured("django CMS requires django.template.context_processors.request in "
                                    "'django.template.backends.django.DjangoTemplates' context processors.")

[aaugustin]

@barseghyanartur For the record, starting a bug report by telling people that their code is insane isn’t the best way to get help. May I suggest “this is incorrect” or “this could be improved” instead? Thanks.

[barseghyanartur]

@aaugustin:

You’re right, man! Approach positively.

@yakky:

Sorry for being rude, if I might have sounded so.