fix onchange: no need to loop in self

Author: dbeguin

realestatinator/models/estate_property.py

@@ -58,7 +58,7 @@ def _compute_best_price(self):
 
     @api.onchange('garden')
     def _set_garden_properties(self):
-        self.garden_orientation = 'N' if self.garden else ''
+        self.garden_orientation = 'north' if self.garden else ''
         self.garden_area = 10 if self.garden else 0
 
         # if self.garden: