instance.py 文件源码

def _set_geom(self):
        xform = self.xform
        data_dictionary = xform.data_dictionary()
        geo_xpaths = data_dictionary.geopoint_xpaths()
        doc = self.get_dict()
        points = []

        if len(geo_xpaths):
            for xpath in geo_xpaths:
                geometry = [float(s) for s in doc.get(xpath, u'').split()]

                if len(geometry):
                    lat, lng = geometry[0:2]
                    points.append(Point(lng, lat))

            if not xform.instances_with_geopoints and len(points):
                xform.instances_with_geopoints = True
                xform.save()

            self.geom = GeometryCollection(points)