# Issue #381

* adds another validity check to SimpleGeomForm (is_size_valid) to make sure the area of the entered geometry is somehow rational (>= 1m²)
* optimizes performance of django command sanitize_db
* extends Geometry model with two new attributes, holding timestamps when a parcel calculation has been started and ended
* finally drops unused update_parcel_wfs in favor of update_parcels in Geometry model
* refactors update_parcel method
* adds geometry buffer fallback in schneider/fetcher.py to avoid emptying of geometries when parcels shall be fetched
* finally removes utils/wfs/spatial.py
* extends GeomParcelsView according to #381
* updates translations
* removes redundant psycopg2-binary requirement

konova/forms/geometry_form.py

@@ -98,12 +98,14 @@ class SimpleGeomForm(BaseForm):
 
             if g.geom_type not in accepted_ogr_types:
                 self.add_error("geom", _("Only surfaces allowed. Points or lines must be buffered."))
-                is_valid = False
+                is_valid &= False
                 return is_valid
 
+            is_valid &= self.__is_size_valid(g)
+
             polygon = Polygon.from_ewkt(g.ewkt)
-            is_valid = polygon.valid
-            if not is_valid:
+            is_valid &= polygon.valid
+            if not polygon.valid:
                 self.add_error("geom", polygon.valid_reason)
                 return is_valid
 
@@ -137,6 +139,24 @@ class SimpleGeomForm(BaseForm):
 
         return num_vertices <= GEOM_MAX_VERTICES
 
+    def __is_size_valid(self, geom: gdal.OGRGeometry):
+        """ Checks whether the number of vertices in the geometry is not too high
+
+        Returns:
+
+        """
+        is_area_valid = geom.area > 1  # > 1m² (SRID:25832)
+
+        if not is_area_valid:
+            self.add_error(
+                "geom",
+                _("Geometry must be greater than 1m². Currently is {}m²").format(
+                    float(geom.area)
+                )
+            )
+
+        return is_area_valid
+
     def __simplify_geometry(self, geom, max_vert: int):
         """ Simplifies a geometry