Just my opinion, but I think raising an exception is more helpful to
developers and will result in fewer unnoticed bugs.
More generally, I know the template engine has a history of silently
converting unknown variables to string_if_invalid but this is more harmful
than helpful in my experience. It continues to be a source of hard to catch
bugs on the projects I work on. So I'd prefer we avoid introducing more of
this pattern if possible.
On Wed, May 31, 2017 at 8:03 AM, Tim Graham <timogra...@gmail.com> wrote:
> Should nonexistent template filter arguments raise an exception? Current
> behavior:
>
> {{ value|filter:nonexistent_template_var}}
>
> raises VariableDoesNotExist for nonexistent_template_var.
>
> I guess the proposal would be to make nonexistent_tempatle_var resolve to
> string_if_invalid. As for me, I think the current behavior is less error
> prone.
>
> Related tickets:
>
> https://code.djangoproject.com/ticket/13167
> This was first closed incorrectly as "fixed" by Jacob (actually a
> different issue was fixed), then amended as wontfix by Karen with the note,
> "I'm fine with wontfixing that, though it does rather seem to go against
> "template errors don't raise exceptions" philosophy."
>
> https://code.djangoproject.com/ticket/28172
> A follow up ticket requesting the same thing as #13167.
>
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