openlayers-2wfs
I am using a Vector Layer with WFS protocol to show only a subset of the data. The filter which defines the subset, changes dynamically from the code. How do I refresh the layer, to show only the data that satisfies the new filter?
layer.refresh(); does not work.
You should be able to set a defaultFilter, or once the protocol is created you can use mergeWithDefaultFilter.
var protocol = new OpenLayers.Protocol.WFS({
version: "1.1.0",
url: MapBase.Configuration.GeoServer.WFS_Service.EndPointURL,
featurePrefix: MapBase.Configuration.GeoServer.WFS_Service.featurePrefix,
featureType: MapBase.Configuration.GeoServer.WFS_Service.featureType,
featureNS: MapBase.Configuration.GeoServer.WFS_Service.featureNS,
geometryName: MapBase.Configuration.GeoServer.WFS_Service.geometryName,
srsName: "EPSG:4326",
defaultFilter: myFilter
});
protocol.mergeWithDefaultFilter(myNewFilter);
For the projection you can add in the following for WFS 1.1.0:
srsName: "EPSG:4326"
A few more details here.
Take a look at this code example:
var adresspt_wfs = new OpenLayers.Layer.Vector("Address points WFS", {
strategies: [new OpenLayers.Strategy.BBOX(), saveStrategy],
protocol: new OpenLayers.Protocol.WFS({
url: "http://localhost:8080/geoserver/wfs",
featurePrefix: "XXXX" //<-- GeoServer workspace name
featureType: "RAILWAY",//<-- layer name
featureNS: "http://localhost:8080/MIA", //<-- Edit Workspace Namespace URI
srsName: "EPSG:900913",
geometryName: "SDO_GEOMETRY" //<-- geometry field
})
});
The featureNS property is equivalent to your Namespace URI in the Edit Workspace page of GeoServer:
Best Answer
If your vector layer is called wfslayer, use the the force option on the refresh method like this: