#16858: incr() on locmem cache resets the expiry time
-------------------------------------+-------------------------------------
Reporter: boxm | Owner: nobody
Type: Bug | Status: new
Milestone: | Component: Core (Cache system)
Version: 1.3 | Severity: Normal
Resolution: | Keywords:
Triage Stage: | Has patch: 0
Unreviewed | Needs tests: 0
Needs documentation: 0 | Easy pickings: 0
Patch needs improvement: 0 |
UI/UX: 0 |
-------------------------------------+-------------------------------------
Changes (by Alex):
* needs_docs: => 0
* needs_tests: => 0
* needs_better_patch: => 0
Old description:
> On the locmem cache backend, calling incr() causes the key's timeout
> value to be reset to the default for the cache.
>
> To reproduce:
> - setup the default cache to be locmem and with a timeout of 1 second
> >> cache.set('key', 10, 300)
> >> time.sleep(1)
> >> cache.get('key')
> 10
> >> cache.incr('key')
> >> time.sleep(1)
> >> cache.get('key')
> None
>
> The cache should still contain the key at the last line.
>
> The problem comes from the implementation of incr() in base.py which uses
> get() and set() to implement incr(). Since set() is called without a
> timeout, the cache default time is used.
New description:
On the locmem cache backend, calling incr() causes the key's timeout value
to be reset to the default for the cache.
To reproduce:
- setup the default cache to be locmem and with a timeout of 1 second
{{{
>> cache.set('key', 10, 300)
>> time.sleep(1)
>> cache.get('key')
10
>> cache.incr('key')
>> time.sleep(1)
>> cache.get('key')
None
}}}
The cache should still contain the key at the last line.
The problem comes from the implementation of incr() in base.py which uses
get() and set() to implement incr(). Since set() is called without a
timeout, the cache default time is used.
--
Comment:
I'm assuming you consider this a bug, and would like it to not reset the
expiry time ;) What's the justification for that behavior, memcached does
it?
--
Ticket URL: <https://code.djangoproject.com/ticket/16858#comment:1>
Django <https://code.djangoproject.com/>
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