Re: [Maposmatic-dev] Recreate map and link problems

[Maxime Petazzoni]

Hi,

* Rodrigo Avila <address@hidden> [2010-07-22 14:48:11]:

> Is possible to, when I recreate a map, retain the same job id? That's why:
> 
> Take a look at this page: http://bit.ly/bMVN7K
> (It's about mapping in areas affected by flooding events here in Brazil)
> 
> As you can see, we have links to printable maps of affected areas. But, if i
> rebuild the map (using the new "Recriar mapa" button) the URL needs to be
> updated. Always. But there's a way to recreate the map (so that visitors can
> always see the most updated map), but without having to update the links in
> the wiki?

We made the design decision to not overwrite a finished job when
recreating the map. Simply because you may not be the one linking to it,
and other people may depend on the files being there, or in a specific
state (for example to demonstrate what has changed with a before/after).

Also, there is a sense of "property" to the maps rendered on MapOSMatic.
How would you feel if someone kept regenerating a map /you/ requested?

That's why it's simpler, and in most cases better, in my opinion, to
really create a new map, with a new ID. The direct consequence of that
too is that the newly requested map ends up at the end of the queue, not
at the beginning, so it is not rendered before requests that were made
before.

Ideally, if your objective is to provide a link to the most up-to-date
map, you should direct your users to one the maps, and tell them to
click the "Recreate map" button. If a recent map is available, the user
will be redirected automatically; if not, a new one, more up-to-date,
will be generated.

But we can't make this available through a direct link, because it would
mean a GET request has an effect on the database, which is wrong (think
link crawlers).


Regards,
- Maxime
-- 
Maxime Petazzoni <http://www.bulix.org>
 ``One by one, the penguins took away my sanity.''
Linux kernel and software developer at MontaVista Software

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