node-orm2 PostGIS custom type example

gistfile1.js

orm.db.defineType('GeoJSON', {
	datastoreType: function GeoJSON_datastoreType(prop) {
		return 'geometry(Geometry, 4326)';
	},
	datastoreGet: function GeoJSON_datastoreGet(prop, helper) {
		return 'ST_AsGeoJSON(' + prop.mapsTo + ')::JSON';
	},
	valueToProperty: function GeoJSON_valueToProperty(value, prop) {
		if (typeof value == "string") return JSON.parse(value);
		else return value;
	},
	propertyToValue: function GeoJSON_propertyToValue(value, prop) {
		if (value == null) return function() {
			return 'NULL';
		};
		else return function(h) {
			return "ST_SetSRID(ST_GeomFromGeoJSON(" + h.escapeVal(JSON.stringify(value)) + "), 4326)";
		};
	}
});