[mapserver-users] perl mapscript queryByRect() and queryByPoint() in 3.5

[imap at chesapeake.net]

Steve(s) + Lowell + list,

About these perl mapscript 3.5 changes...

Ok, I understant $results = layer->{resultcache} part, but
in $layer->getResult(0), I'm having a bit of trouble with the
lack of documentation..  does 0 represent the first result
in the resultcache?  If so, I should be able to iterate the
$layer->getResult() thru numlayers, is that correct?  The
reason I am asking about this... In the 3.4 results object,
there was a method called $result->next() that we used to
fetch the MS_MULTIPLE results in a for loop.  If the next()
method is gone is mapserver 3.5, I am wondering why?  
It seemed to be much cleaner that dealing with shapeitems 
from a $result = getResult(0); $record = $result->{shapeitem};

Is there a technical reason for losing the $result->next() 
method?  Was this something that *needed* to change to 
accomodate OGR, WMT or some other component?  For a minor
rev, the impact on mapscript is pretty dramatic and not
too compatible with the previous version.  I dont mind
rewriting code in lieu of better methods, functions, etc.
but my opinion, what we got here isnt as elegant as the previous 
version...   I guess we just gotta code with the flow.

Regards,

Chris Stuber (mapsurfer)
Silicon Mapping Solutions, Inc
(410)257-3187



Lowell Filak wrote:
> 
> Actually the result is in $layer->getResult(0) . The layer->{resultcache} is for doing things like $result_cache->{numresults}. And you guessed it, the query...() returns a status.
> I did have a typo in the latest version of the Perl-MapScript docs that may have confused things but an update should be posted very soon.
> Also an example of a query is due to be posted to the wiki very soon. (Don't let that stop you from posting your example however).
> Lowell F.
> 
> The following message was sent by imap at chesapeake.net on Wed, 08 May 2002 05:39:25 -0400.
> 
> >
> >
> > Guys, I wanted to contribute some stuff to the Perl MapScript Wiki,
> > but when I went to test things out, all my query stuff is broken
> > under version 3.5/3.6.
> >
> > Going over some recent emails in the archive,
> > it is my understanding that queryByRect($rect) now returns
> > an integer (I am guessing status) and you have to get the
> > results from the layer->{'resultcache'}.
> >
> > $layer = $querymap->getLayerByName("county");
> > $status = $map->queryByRect($rect);
> > print "status of query: ".$status."\n";
> > $results = $layer->{'resultcache'};
> > print "number of results: ".$results->{'numresults'}."\n";
> >
> > status of query: 1
> > number of results:
> >
> >
> > ------- mapfile ----------
> >
> > LAYER
> >   NAME county
> >   TYPE LINE
> >   STATUS ON
> >   DATA "dtl_cnty"
> >   TEMPLATE dummy
> > END
> >
> >
> > bah...  and queryByPoint() is behaving the same way.
> > Does anybody have an example of queryByRect() and/or
> > queryByPoint() working in perl mapscript?
> >
> > Regards,
> >
> > Chris