[TYPO3-dev] date and datetime fields

[ries van Twisk]

On Feb 23, 2008, at 1:33 PM, Steffen Kamper wrote:

>
> "Martin Kutschker" <martin.kutschker-n0spam at no5pam-blackbox.net>  
> schrieb im
> Newsbeitrag
> news:mailman.1.1203790936.12685.typo3-dev at lists.netfielders.de...
>>> Steffen Kamper schrieb:
>>> how can this work? the start/stop has to be read anyway imho.
>>
>> Of course I wrote nonsense :-) It's the cache of pages linking to the
>> possibly hidden page that is the problem. You would have to tune  
>> their
>> cache time manually. The clear-at-midnight is just a simple idea to  
>> make
>> sure that at midnight all pages are regenerated so that links to  
>> oages
>> with start/stop may appear and disappear.
>
> damn, that makes it really complicate. So how to fiddle all the  
> pages that
> link to the appearing page? Or clear all page cache?
>
>>
>>> So may be i don't know the real process with cache, is record  
>>> untouched
>>> when page is cached?
>>> If page has a start-date, it's not displayed before, how could the  
>>> page
>>> be cached? (stop yes)
>>
>> See above.
>>
>>> Should such signal-dates processed anyway and also used for  
>>> clearing the
>>> cache?
>>
>> TYPO3 has "now" (for a couple of versions) the soft-references  
>> feature.
>> IMHO this could be used for improved cache management. A cron job  
>> could
>> look for pages that change state (shown/hidden) because of start/ 
>> stop and
>> could clear the cache for all pages that link to those pages. A  
>> similiar
>> mechanism could be used in the BE whenever a page is changed.  
>> Currently
>> there is only the option to clear the cache of the parent and the  
>> siblings
>> but here again soft-refences could come into play.
>>
>> Masi
>
> sounds promising. I don't know this soft-references, where do i find  
> this in
> core?
>
> vg  Steffen



Isn't it simple possible to make a join against the pages table to  
check if
a page needs to be generated or not? Not everybody can create cron jobs,
specially on shared hosting providers.

Ries