Re: [mapserver-users] NQuery problem

Subha Ramakrishnan Fri, 13 Mar 2009 08:06:03 -0700

Hi David,

Thanks a lot for the reply.
It would be great if you can give me an example url.


Thanks & regards,
Subha

Fawcett, David wrote:

Subha,

In taking a quick look at your layer, I think that you have a problem
with your data statement.  I am quite sure that if you want to use an
attribute(column) from your data layer for classification or query
results, you need to explicitly include the name of that column in the

select query that is in your data statement.

David.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Subha
Ramakrishnan
Sent: Friday, March 13, 2009 1:44 AM
To: Steve Lime
Cc: [email protected]; [email protected]
Subject: Re: [mapserver-users] NQuery problem


Hi

Here's how the layer looks in my mapfile:
layer
  name abc
  connectiontype postgis
  connection "user= user dbname=xyz host=localhost"
  type point
  tolerance 20
    group world
    dump true
    METADATA
       "wfs_title" "Factbook Metadata"
       "gml_include_items" "all"
       "wms_feature_info_mime_type" "text/html"
    END
    template "template.html"
    projection
      "init=epsg:4326"
    end
    transparency 65
    status on
  data "topology from tablename using unique id using SRID = -1"
  classitem "veg_class"
        class
                name "AGRICULTURE"
                expression "AGRICULTURE"
                style
                        symbol 'custom_icon'
                        size 20
                        color 179 189 209
                        outlinecolor 000 000 000
                end
        end
end

Status is on and template is defined.
Am i missing something else?

Thanks a lot for the help.

Subha
Steve Lime wrote:

For a layer to be queryable you have to:

  1 - either set Status DEFAULT, or explicitly turn it on (e.g.

layer=abc)

  2 - define the layer TEMPLATE property

Are those true?

Steve

Subha Ramakrishnan <[email protected]> 03/13/09 12:38 AM >>>

Hi,

I am also facing a similar problem. It doesn't throw an error but it
doesn't give me a result either.

My url looks like this :http://localhost/cgi-bin/mapserv?MAP=abc.map&MODE=nquery&LAYERS=abc&im

gext=8920506.9477+3496535.4213+8954750.736418456+3530779.2100573704&im
gbox=657+209+686+239&imgxy=670+230

The extent given here is within  the map extent.
Can you please tell me if there's some mistake here?

Thanks a lot.

Subha

Steve Lime wrote:

Nquery doesn't require qstring validation. What does your URL looklike?
Steve
Rui Gomes <[email protected]> 03/12/09 9:42 PM >>>
I try to use the nquery function and i recived the follow errormessage:
mapserv(): Web application error. Metadata qstring_validation_pattern

is not set.
To avoid this i insert in the mapfile the follow lines inr the layeri want to query:
METADATA
          qstring_validation_pattern '.'
END


What this lines means. Why i have to put it?

Thanks


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