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
34692	django.forms.renderers.get_default_renderer()'s template loader cache is not being reset on autoloads.	Andrew	Priyank Panchal	"Whenever a template file changes,
django.template.autoreload.template_changed() is called, which in turn calls
django.template.autoreload.reset_loaders(), which clears the template cache in every backend.engine's template loaders.

However, Django's renderer for Forms uses forms.renderers.get_default_renderer(), which returns a mixin that has its own engine instance, and therefore its own loaders (and template caches). This engine is never reset on autoloads. This means that any changes to a template that is referenced as part of, EG ""Form.template_name"", is never refreshed on changes. The entire runserver process must be restarted for any templates cached through forms.renders to be reloaded. This is tedious and does not match the behavior seen by non-form cached templates.

A crude fix can be demonstrated by changing reset_loaders() to the following:

{{{
def reset_loaders():
    for backend in engines.all():
        if not isinstance(backend, DjangoTemplates):
            continue
        for loader in backend.engine.template_loaders:
            loader.reset()

    # this code is new: reset the form renderer's template cache as well
    from django.forms.renderers import get_default_renderer
    backend = get_default_renderer().engine
    if isinstance(backend, DjangoTemplates):
        for loader in backend.engine.template_loaders:
            loader.reset()
}}}
"	Bug	closed	Forms	4.2	Normal	fixed		David Smith	Ready for checkin	1	0	0	0	0	0