Hi,
it's been removed.
see: https://mapserver.org/cgi/controls.html#using-mapserver-version-8
Previous versions of the MapServer CGI program allowed certain
> parameters to be changed via a URL using a cumbersome synta
Here's a bit longer explanation Steve Lime wrote a few month ago:
-------- Weitergeleitete Nachricht --------
Betreff: Re: [MapServer-users] mapserver 8 - CGI map_object
substitutions broken?
Datum: Thu, 6 Oct 2022 14:49:32 -0500
Von: Steve Lime <sdl...@gmail.com>
An: Tim Kempisty <timothy.kempi...@noaa.gov>
Kopie (CC): mapserver-users@lists.osgeo.org
Hi Tim: I was wondering if I'd see any messages on that topic. Short story is
that the functionality was removed in MS8. I never liked the all-or-nothing
aspect of it and was working on a method to control which objects would be
allowed to be updated. The solutions I came up with were convoluted and were
going to add a lot of complexity to the codebase for little value. That
functionality is poorly documented and by itself overly complicates the code.
So after a note to mapserver-users trying to judge how much it was used - with
limited replies - it was decided to remove it. I'm dealing with my own upgrade
issues as a result, but it's worth it in the end IMHO.
If necessary, it's better to revisit with another method - ideally something
along the lines of runsubs. The challenge is specifying when to apply them and
how to validate values. Strings are easy, but numeric/color values aren't so
we'd need to do something like add runtime bindings (similar to attribute
bindings) so you'd write SIZE %mysize% instead. One advantage being you could
reuse the variable across layers.
So, what are the options right now? It sort of depends on your needs. Do you
need to only support a couple of sizes for a class or do you truly need *any*
size? Options include:
* multiple mapfiles - probably using includes to limit redundancy
* class groups
* if you're using a db backend I think attribute bindings could work
paired with runsubs
DATA "shape FROM (select *, %textsize% AS textsize FROM ...)
VALIDATION
"textsize_default" "13"
"textsize" "^8|10|12|14$"
END
CLASS
LABEL
SIZE [textsize] # I think attribute binding works here
END
END
* MapScript - load the mapfile, do the changes you need, render the map
Happy to discuss further and perhaps other folks have ideas.
Am 30.03.23 um 14:55 schrieb Benedek Petrovicz:
Hi!
I just upgraded MapServer from 7.7.0 to 8.0.0 and some CGI parameters
just stopped working.
I'm trying to change the label size on a specific layer with the
following parameter: *map.layer[county].class[0].label[0]=SIZE+24*
In 7.7.0 it's working perfectly.
In 8.0.0 it's not changing anything.
I couldn't find any notes about dropping this functionality in 8.0.0,
but I might have missed something.
What am I missing here?
Thank you!
Benedek
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