logging view errors

[Shawn Milochik]

I think this is something I'd like to open up a ticket for, but first I
want to see whether it's already possible, or is overruled by existing
design decisions.

Desire:
Now that logging is built into Django, I think that any time there is an
exception in a view a logging.exception message should be sent.

Currently, if you create a logging handler to handle 'django' or
'django.request' there is no 'logging' call for the exception.

Justification:
Without this, a developer would have to needlessly complicate all views
with exception handlers or apply a decorator universally across all
views to ensure that this information (including the stack trace, which
comes for free with logging.exception) is logged.

Use cases:

1. For a view accessed via AJAX, if there is an error in a view a 500
(or a 403 for a missing CSRF token) error will occur, but nothing is
logged and there is no obvious way to figure out what broke. This is
mainly useful during development.

2. In production, it would be helpful to be able to check the log for
these errors to preemptively fix bugs.

Thank you for your time.

Shawn

[Michael Blume]

A developer can currently do this pretty easily with middleware by setting a process_exception method. We could provide some contrib middleware for logging exceptions, but I don't see any need to bring this into core.

-Mike

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[Shawn Milochik]

On 05/10/2011 04:52 PM, Michael Blume wrote:
> A developer can currently do this pretty easily with middleware by
> setting a process_exception method. We could provide some contrib
> middleware for logging exceptions, but I don't see any need to bring
> this into core.
>
> -Mike
>

Mike,

You and someone on django-users both told me about process_exception,
which I had been unaware of. It looks perfect for what I need.

Thanks,
Shawn

[Florian Apolloner]

Hi,

On May 10, 11:33 pm, Shawn Milochik <sh...@milochik.com> wrote:
> You and someone on django-users both told me about process_exception,
> which I had been unaware of. It looks perfect for what I need.

There is also a signal for it: http://docs.djangoproject.com/en/dev/ref/signals/#got-request-exception
if you don't want to write the middleware ;)