pymemcache also supports a cas() method, so that's two backends that could
have the other method.

I think the main problem is as Russell highlighted - supporting other
backends. It would be nice to see research into emulating cas(), at least
on LocMemCache which is often used as a fake during testing. Have you got
any input there?

On Tue, 29 Jun 2021 at 18:18, ipcam...@gmail.com <ipcampb...@gmail.com>
wrote:

> Currently `PylibMC` includes support for CAS:
> https://sendapatch.se/projects/pylibmc/reference.html#pylibmc.Client.cas
>
> Would a PR be welcome that would implement the `cas` and `gets` methods on
> the `PylibMCCache` cache backend? This would also require setting the `cas`
> behavior to `True` in the `CACHES` setting; I could include documentation
> explaining this in the `PylibMCCache` docs as well.
>
> Thanks so much for maintaining Django. I'd love to help contribute my
> first PR to Django if this would be welcomed!
> On Friday, January 17, 2014 at 9:58:40 PM UTC-5 Curtis Maloney wrote:
>
>> Is it CAS specifically that you want?  Or a Locking primitive?  Or some
>> other operation?
>>
>> --
>> Curtis
>>
>>
>> On 18 January 2014 12:45, Russell Keith-Magee <rus...@keith-magee.com>
>> wrote:
>>
>>>
>>> I can't see any reason that we *shouldn't* support it - it seems like a
>>> reasonable primitive to support.
>>>
>>> The only real issue is ensuring it either is, or can be, implemented on
>>> all backends and supported memcache libraries. If you can produce a patch
>>> that does this, I'd say it has a good chance of being merged into trunk.
>>>
>>> Yours,
>>> Russ Magee %-)
>>>
>>>
>>> On Sat, Jan 18, 2014 at 2:41 AM, Alexey Moskvin <dbf...@gmail.com>
>>> wrote:
>>>
>>>> Hi all,
>>>> there is a usefull (for me now :)) CAS operation in memcache:
>>>> http://neopythonic.blogspot.ru/2011/08/compare-and-set-in-memcache.html,
>>>> but I can't find it in django cache api.
>>>> Are there any reasons for it not to be implemented there?
>>>> Thank you!
>>>>
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