Opened 9 years ago

Closed 7 years ago

#16675 closed Cleanup/optimization (duplicate)

Refactor the class/function loading code to use common API

Reported by: Jannis Leidel Owned by: nobody
Component: Core (Other) Version: 1.3
Severity: Normal Keywords:
Cc: Triage Stage: Accepted
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


There are countless code snippets in Django that load a particular callback or backend and each handle the possible exceptions differently.

I think for the most of those examples we can use a common API which would lower the chance of breakage as well be useful to users.

Jonas Obrist implemented this kind of thing in his django-load app (

Attachments (1)

importutils.diff (5.8 KB) - added by Jannis Leidel 9 years ago.
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Change History (5)

comment:1 Changed 9 years ago by Jannis Leidel

I've updated Jonas' code slightly and added it to the django.utils.importlib module.

If accepted, this would require more work on the actual code parts where imports are done.

comment:2 Changed 9 years ago by Russell Keith-Magee

Component: UncategorizedCore (Other)
Triage Stage: UnreviewedAccepted

I'll accept this in principle -- the "load a backend" pattern is something that we've reimplemented far too many times. If we can pull this back to a common API without losing all the edge cases, it seems like a no-brainer to me.

From a first inspection, this snippet from Jonas looks like a good approach to me -- I'd just need to see it in use for a couple of actual use cases to be 100% convinced.

comment:3 Changed 7 years ago by Aymeric Augustin

Wasn't this fixed by 7c5b2448?

I'm not sure I understand correctly the scope of this ticket.

comment:4 Changed 7 years ago by Claude Paroz

Resolution: duplicate
Status: newclosed

I wasn't aware of this ticket when I committed [7c5b2448] (#17061). If the possibility to customize the raised exception is needed somewhere in Django, we can always add it at a later stage.

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