partial correction for persistence

IMPORTANT: This version neec top be checked for meb import as seems that the cooling and heating demand aren't imported properly.

hub/persistence/models/city_object.py

@@ -6,6 +6,7 @@ Project Coder Guille Gutierrez Guillermo.GutierrezMorote@concordia.ca
 """
 
 import datetime
+import logging
 
 from sqlalchemy import Column, Integer, String, Sequence, ForeignKey, Float
 from sqlalchemy import DateTime
@@ -51,19 +52,27 @@ class CityObject(Models):
     self.roof_area = sum(roof.solid_polygon.area for roof in building.roofs)
     self.total_pv_area = sum(roof.solid_polygon.area * roof.solar_collectors_area_reduction_factor for roof in building.roofs)
     storeys = building.storeys_above_ground
+    wall_area = 0
+    window_ratio = 0
+    try:
       if storeys is None:
         storeys = building.max_height / building.average_storey_height
-    self.total_heating_area = building.floor_area * storeys
-    wall_area = 0
-    for wall in building.walls:
-      wall_area += wall.solid_polygon.area
-    self.wall_area = wall_area
-    window_ratio = 0
       for internal_zone in building.internal_zones:
         for thermal_zone in internal_zone.thermal_zones_from_internal_zones:
           for thermal_boundary in thermal_zone.thermal_boundaries:
             window_ratio = thermal_boundary.window_ratio
             break
+    except TypeError:
+      storeys = 0
+      logging.warning(
+        'building %s has no storey height so heating area, storeys and window ratio cannot be calculated',
+        self.name
+      )
+    self.total_heating_area = building.floor_area * storeys
+
+    for wall in building.walls:
+      wall_area += wall.solid_polygon.area
+    self.wall_area = wall_area
     self.windows_area = wall_area * window_ratio
     system_name = building.energy_systems_archetype_name
     if system_name is None: