Hi,
your findings are correct. The feature prefix is lost because it will only be
used if a featureNS is specified, which Protocol.WFS.fromWMSLayer does not
know. this happens in Format.WFST.v1_1_0, lines 124-130:
var node = this.createElementNSPlus("wfs:Query", {
attributes: {
typeName: (options.featureNS ? options.featurePrefix + ":" : "") +
options.featureType,
srsName: options.srsName
}
});
This can be considered a bug in OpenLayers. But you can always create your
protocol without using Protocol.WFS.fromWMSLayer and specify a featureNS. Then
you don't need a featurePrefix at all.
Regards,
Andreas.
On Jan 25, 2011, at 16:30 , Charles Galpin wrote:
> Does anyone have any idea what the problem is here?
> OpenLayers.Protocol.WFS.fromWMSLayer is supposed to pickup the properties
> from the WMS layer but is losing the feature prefix in the typeName sent.
>
> <wfs:query typeName="links" >
>
> When It should be
>
> <wfs:query typeName="myNS:links" >
>
> I have stepped through the constructor and the protocol seems to have the
> feature prefix ten. I have tried setting the featurePrefix and typeName a
> variety of ways but nothing seems to take.
>
> Can anyone at least confirm this works for them when using a non-default
> namespace on the server?
>
> thanks,
> charles
>
>
> On Jan 24, 2011, at 11:15 AM, Charles Galpin wrote:
>
>> I have a GetFeature control that is constructed with a protocol created from
>> an existing WMS layer which is working fine. However where getfeature
>> requests are being sent the feature namespace is not sent, i.e. 'links' is
>> sent instead of 'myNS:links'. This has been working I think because of my
>> default namespace in geoserver, but I now want to use another namespace that
>> is not the default, and I can see the default namespace in the response
>> (which is not correct). I have tried setting featureNS parameters to both
>> these constructors but it still doesn't get passed through.
>>
>> Does anyone know how to do this?
>>
>> var links = new OpenLayers.Layer.WMS(
>> "Links", "/geoserver/wms",
>> {
>> layers: 'myNS:links',
>> styles: '',
>> srs: 'EPSG:4326',
>> format: 'image/png',
>> tiled: 'true',
>> tilesOrigin : map.maxExtent.left + ',' +
>> map.maxExtent.bottom,
>> transparent: true
>> },
>> {
>> visibility: false,
>> buffer: 0,
>> 'opacity': 0.75,
>> 'isBaseLayer': false,
>> 'wrapDateLine': true
>> }
>> );
>>
>> var getFeatureControl = new OpenLayers.Control.GetFeature({
>> // The request is sending coordinates in EPSG:900913
>> protocol: OpenLayers.Protocol.WFS.fromWMSLayer(links, {srsName:
>> "EPSG:900913"}),
>> box: true,
>> hover: true,
>> multipleKey: "shiftKey",
>> toggleKey: "ctrlKey"
>> });
>>
>> thanks,
>> charles
>
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--
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.
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