[mapserver-users] default values if not provided in the URL

[Smith, Michael ERDC-CRREL-NH]

I guess I get around that by passing class=1 as my filter so I can pass
1=1 as the default

If you want to set a default that gets all, perhaps you could use a like
filter

FILTER "Class like %class%"

And a default of "%"

Mike

-- 
Michael Smith

US Army Corps
Remote Sensing GIS/Center



On 10/27/11 9:56 AM, "Puneet Kishor" <punk.kish at gmail.com> wrote:

>
>On Oct 27, 2011, at 11:22 AM, Smith, Michael ERDC-CRREL-NH wrote:
>
>> Punnet,
>> 
>> What I do in the situations where I want to default to all or allow some
>> filtered access is
>> 
>> METADATA
>>   "default_classes" "1=1"
>> END
>> 
>> So the dummy condition is passed when no filter is specified.
>> 
>> 
>> 
>
>
>Believe it or not, I thought up of the above solution myself but
>discarded it because I understood the text in the documents to mean the
>following --
>
>	FILTER "class = '%class%'"
>
>will be applied if a class is provided. However, if no class is provided,
>and if the following is provided
>
>	METADATA
>		"default_class" "1=1"
>	END
>
>Then the filter will become "class = '1=1'", which is, of course not
>correct. And, I just checked the logs with the above mods, and my
>suspicion was proven correct. My log file shows ms croaking with the
>following
>
>select "class",encode(ST_AsBinary(ST_Force_2D("the_geoms"),'NDR'),'hex')
>as geom,"gid" from table where the_geoms &&
>GeomFromText('POLYGON((-180.150250417362 -90,-180.150250417362
>90,180.150250417362 90,180.150250417362 -90,-180.150250417362
>-90))',4326) and (class = '1=1')
>
>Obviously, I do not want "class = '1=1'"
>
>
>> 	
>> 
>> 
>> On 10/27/11 8:49 AM, "Puneet Kishor" <punk.kish at gmail.com> wrote:
>> 
>>> the fine manual says http://mapserver.org/cgi/runsub.html
>>> 
>>>> Since version 5.6, you can provide a default value for any
>>>>substitution
>>>> parameter, that will be applied if the parameter was not found in the
>>>> url. 
>>>> You do this by providing special entries inside the layer metadata :
>>>> 
>>>> 	METADATA
>>>> 		'default_sound' 'yes'
>>>> 		'default_nseats' '5'
>>>> 		'default_multimedia' 'yes'
>>>> 	END
>>>> 
>>>> In this example, the mapfile will be created as if the url contained
>>>> ³&sound=yes&nseats=5&multimedia=yes²
>>> 
>>> 
>>> Right then. Except, I want *all* my classes to be drawn if no class has
>>> been provided. And, if one or more classes have been provided, then I
>>> want only those to be drawn. So,
>>> 
>>> 	http://server/mapfile?mode=map
>>> 
>>> should return a map with all the 100+ classes in a layer. And
>>> 
>>> 	http://server/mapfile?mode=map&classes=Foo,Bar
>>> 
>>> (or some other variation of the above) should return a map with only
>>>the
>>> requested classes in the layer. I can't think of anyway of doing the
>>> above without resorting to scripting, and I still have had no luck with
>>> WMS returned from Perl MapScripting.
>>> 
>>> Suggestions.
>>> 
>>> --
>>> Puneet Kishor_______________________________________________
>>> mapserver-users mailing list
>>> mapserver-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>> 
>