I am trying to find a working example of editing the attributes of a feature in a PostGIS table published in GeoServer (2.8), using Javascript libraries like openlayers (3 & 4).
The closest thing I can find is the Modify Feature example from the openlayers documentation, but it only touches geometry not attributes. In addition it is based on GeoJSON, not a database backend.
The next closest is an OpenGeo blog, but it's just a blog with a screenshot without and code snippet. Also relevant is a similar GIS.SE question: Map editor R & leaflet?. The answer there suggests that one has to program it from javascript.
Before reinventing some wheels, can anyone give me some pointers how to implement such a function for setting the attribute of a feature?
FYI, I have copied the said openlayers 4 example below as a starting point.
<!DOCTYPE html>
<html>
<head>
<title>Modify Features</title>
<link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script>
</head>
<body>
<div id="map" class="map"></div>
<script>
var raster = new ol.layer.Tile({
source: new ol.source.OSM()
});
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
url: 'https://openlayers.org/en/v4.0.1/examples/data/geojson/countries.geojson',
format: new ol.format.GeoJSON(),
wrapX: false
})
});
var select = new ol.interaction.Select({
wrapX: false
});
var modify = new ol.interaction.Modify({
features: select.getFeatures()
});
var map = new ol.Map({
interactions: ol.interaction.defaults().extend([select, modify]),
layers: [raster, vector],
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
</script>
</body>
</html>
-- EDIT --
This is not a duplicate of the said question How can I use WFS-T in openlayers?, as that question is about OpenLayers 2. As said in the beginning, my question is about OpenLayers 3&4, which is not backwards compatible with Openlayers 2, and missing a large number of features in OpenLayers2. So the said question/answers don't apply here. I've also used the openlayers tag per tag description to differentiate this from openlayers2 questions.
OpenLayers.Strategy.Save()in OpenLayers 3 in that one-liner answer to begin with. How should one test it?