id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
36775	Raise ImproperlyConfigured when Feed.link is missing instead of failing with AttributeError	yureiblack		"Currently, the `Feed.get_feed()` method retrieves the feed's `link` using:

    link = self._get_dynamic_attr(""link"", obj)

If a Feed subclass does not define a `link` attribute, `link` becomes `None`.
This results in an unhelpful exception when Django later calls:

    link = add_domain(current_site.domain, link, request.is_secure())

Since `add_domain()` calls `url.startswith()`, a missing `link`
causes:

    AttributeError: 'NoneType' object has no attribute 'startswith'

This error does not clearly indicate the actual problem.

According to Django documentation, every `Feed` class must define
`link`. Therefore, it should raise a more appropriate and explicit
exception.

The attached PR adds the following check:

    if link is None:
        raise ImproperlyConfigured(
            ""Feed class must define a 'link' attribute.""
        )

This results in a clearer error message and avoids unexpected crashes.

PR: https://github.com/django/django/pull/20371
"	Bug	new	contrib.syndication	dev	Normal			yureiblack	Unreviewed	1	0	0	0	0	0