How to extend cache ttl (time-to-live) in django-redis?

Question

I'm using django 1.5.4 and django-redis 3.7.1

I'd like to extend cache's ttl(time-to-live) when I retrieved it.

Here is sample code

from django.core.cache import cache

foo = cache.get("foo)

if not foo:
    cache.set("foo", 1, timeout=100)
else:
    // Extend Cache's Time-To-Live something like it
    cache.ttl("foo") = 200

I tried to search this option at django-redis-docs, but I couldn't find it.

However, I noticed that designate time-to-live value for existing cache is available at redis native command like "Expire foo 100"

I know that using cache.set once more make same effect, but I'd like to use more simple method with time-to-live attribute.

If you found the solution, please post it as an answer, instead of editing it into the question. — Andrew Barber, Sep 12 '14 at 16:53
@AndrewBarber Thanks for your comment. I've answered by myself. — Chemical Programmer, Sep 13 '14 at 16:06
Yup! Thanks for entering the answer! And for coming back to want to update with the answer, in the first place! — Andrew Barber, Sep 15 '14 at 13:00

score 7 · Answer 1 · answered Apr 11 '20 at 19:33

To extend a ttl(time-to-live) of the django-redis cache record use expire(key, timeout)

Django-Redis: Expire & Persist

from django.core.cache import cache

cache.set("foo", 1, timeout=100)
cache.ttl("foo")
>>> 100

You cannot extend ttl(time-to-live) if the key already expired

if cache.ttl("foo") > 0:
    cache.expire("foo", timeout=500)

cache.ttl("foo")
>>> 500

score 1 · Answer 2 · answered Sep 13 '14 at 16:06

I solved this problem.

(1) Using 'Raw Client Access' and (2) Extend TTL value without overwriting

Please refer following code.

from redis_cache import get_redis_connection

con = get_redis_connection('default')

con.expire(":{DB NUMBER at settings.py}:" + "foo", 100)

How to extend cache ttl (time-to-live) in django-redis?

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