Created question in FIWARE Q/A platform on 25-05-2015 at 16:05
Please, ANSWER this question AT http://stackoverflow.com/questions/30440460/openlayers-3-wfs-t-post-feature-to-postgis-via-geoserver

Question:
Openlayers-3 WFS-T (Post feature to postgis via geoserver)

Description:
I have a problem with posting features from ol3 into postgis db via geoservers wfs.When i run this code, i only manage to insert gid(pk) and bin columns but the_geom(Geometry) column is empty.

function addInteraction() {
draw = new ol.interaction.Draw({
features: featureOverlay.getFeatures(),
type: /** @type

*/ (typeSelect.value)

});
draw.on('drawend', function(evt) {
var feature = evt.feature;
feature.set('bin', 0);
var fid = feature.getId();
var node = format.writeTransaction([feature], null, null, {
gmlOptions:

,
featureNS: "fiware",
featureType: "nyc_buildings"
});
$.ajax({
type: "POST",
url: "http://192.168.4.33:9090/geoserver/wfs",
data: new XMLSerializer().serializeToString(node),

contentType: 'text/xml',
success: function(data)

,
error: function(e)

,
context: this
});

});
map.addInteraction(draw);
}

Xml that i get is:

<Transaction xmlns="http://www.opengis.net/wfs" service="WFS" version="1.1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/WFS-transaction.xsd http://192.168.4.33:9090/geoserver/grp/wfs/DescribeFeatureType?typename=fiware:nyc_buildings">
<Insert>
<nyc_buildings>
<geometry>
<Polygon xmlns="http://www.opengis.net/gml" srsName="EPSG:3857">
<exterior>
<LinearRing srsName="EPSG:3857">
<posList>-12682023.77343518 4567060.841291264 -11077457.675672762 2571137.15870874 -9629434.611838378 5819405.112715591 -12682023.77343518 4567060.841291264
</posList>
</LinearRing>
</exterior>
</Polygon>
</geometry>
<bin>0</bin>
</nyc_buildings>
</Insert>
</Transaction>

And xml that i know it works is:

<wfs:Transaction
service="WFS"
version="1.1.0"
xmlns:fiware="fiware"
xmlns:wfs="http://www.opengis.net/wfs"
xmlns:gml="http://www.opengis.net/gml"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/wfs
http://schemas.opengis.net/wfs/1.1.0/WFS-transaction.xsd
http://192.168.4.33:9090/geoserver/grp/wfs /DescribeFeatureType?typename=fiware:nyc_buildings">
<wfs:Insert>
<fiware:nyc_buildings>
<fiware:bin>0</fiware:bin>
<fiware:the_geom>
<gml:MultiSurface srsDimension="2" srsName="http://www.opengis.net/gml/srs/epsg.xml#2908">
<gml:surfaceMember>
<gml:Polygon srsDimension="2">
<gml:exterior>
<gml:LinearRing srsDimension="2">
<gml:posList>988431.501 208900.429 988414.001 208910.222 988393.197 208921.866 988439.703 209005.415 988460.579 208993.729 988481.799 208981.856 988462.619 208948.07 988456.73 208951.37 988442.511 208925.97 988448.961 208922.361 988439.27 208904.93 988435.53 208898.25 988431.501 208900.429</gml:posList>
</gml:LinearRing>
</gml:exterior>
</gml:Polygon>
</gml:surfaceMember>
</gml:MultiSurface>
</fiware:the_geom>
</fiware:nyc_buildings>
</wfs:Insert>

I have been banging my head for ten hours with this.Help anyone