Looking at the code Carlton provided sounds like it meets what was being
requested, but it fails "There should be one-- and preferably only one
--obvious way to do it." in that it wasn't immediately obvious, but adding
the cacheif tag would lead to more than one way. Therefore I'm suggesting
that either the new template tag gets added or this gets documented in
https://docs.djangoproject.com/en/4.1/topics/cache/#template-fragment-caching
. I think the suggestion from Carlton is readable enough that it just
should be documented as an example, so it becomes more obvious how to put
it together when glancing at this section.
This section also mentions that "The fragment is cached forever if timeout
is None." But it's missing the "A timeout of 0 won’t cache the value." Note
that appears in other references for the timeout value.
- Joe
PS: If I remember, I'll make a PR for those when I get home from work, but
I'm more than happy for someone to beat me to it.
On Wed, Nov 2, 2022 at 2:39 AM Carlton Gibson <carlton.gib...@gmail.com>
wrote:
> Hi Igor,
>
> The sort of thing I had in mind was:
>
> {% with cache_timeout=request.user.is_authenticated|yesno:"0,500" %}
> {% cache cache_timeout sidebar %}
>
> ...
>
> {% endcache %}
> {% endwith %}
>
> Kind Regards,
>
> Carlton
>
> On Wednesday, 12 October 2022 at 17:17:57 UTC+2 des...@gmail.com wrote:
>
>> Hey Carlton,
>> I am not sure I got your idea.
>> The point of proposal is not in user.is_authenticated.
>> user.is_authenticated is just a boolean. Conditional caching for non logged
>> in user is just very simple and common use case when `cacheif` could be
>> used.
>>
>> пʼятниця, 30 вересня 2022 р. о 09:09:53 UTC+2 carlton...@gmail.com пише:
>>
>>> Hey Igor,
>>>
>>> I wonder if you can achieve the same varying the timeout parameter based
>>> in user.is_authenticated?
>>>
>>> Kind Regards,
>>>
>>> Carlton
>>>
>>> On Sat, 24 Sept 2022 at 15:35, Igor Margitich <des...@gmail.com> wrote:
>>>
>>>> Hi django-developers,
>>>>
>>>> I would like to propose new template tag `cacheif`. Could be useful
>>>> when you need to cache part of html and it depends on some condition.
>>>> Template tag is similar to built-in `cache` tag but accepts extra boolean
>>>> parameter. See example:
>>>>
>>>> {% cacheif user.is_anonymous 10 homepage %}
>>>> <div class="content">
>>>> .....
>>>> </div>
>>>> {% endcacheif %}
>>>>
>>>>
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>>>>
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