Re: [SMW-devel] Map markers only when editing

[Markus K. <ma...@se...>]

On 17/09/2010 20:06, Jeroen De Dauw wrote:
> Hey,
>
>     Hi, I have one front page map that shows markers of entered
>     locations. If I add a location it does not show up until I "edit"
>     the front page map.  Is this a query/cache issue? If I would like
>     these markers to show without having to physically click edit on the
>     map, what is the best way? I have looked through documentation, but
>     am unsuccessful at this point. Thanks.
>
>
> SMW only updates queries when the page they are in is re-parsed. Adding
> ?action=purge to the URL will do the same job as doing a null-edit.
> Special:SMWAdmin allows you to update all queries on your wiki, and SMW
> has a maintenance script that refreshes all pages.
>
> You can disable the cache (but that's obviously not good for
> performance). There are other solutions I think, but I'm not familiar
> with them.

For most practical purposes, this answer might be sufficiently accurate, 
but I would like to add that ?action=purge does *not* do the same job as 
a null-edit. There are two independent things that relate to these two 
activities:

(1) the content of MediaWiki's page cache (and possibly of other caches 
like Squid, if used),
(2) the content of the SMW annotation database.

Calling ?action=purge will reset (1) but not (2). Using the SMWAdmin 
page or SMW_refreshLinks.php script will ensure that (2) is refreshed 
but not (1).

It is possible to invalidate (1) completely (so that it is recomputed 
for all pages when viewed next) by doing a null edit to your 
LocalSettings.php (or by running touch LocalSettings.php on the command 
line).

Markus


>
> --
> Jeroen De Dauw
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