in get_all shelfs in precision simple case, do not try to access missing fields

shelfs/models.py

@@ -564,11 +564,12 @@ class Shelfs(models.Model):
             else:
                 res = api.execute('product.shelfs', 'get', {})
             for r in res:
-                if r['ongoing_inv_start_datetime'] == "1-01-01 00:00:00":
-                    r['ongoing_inv_start_datetime'] = ""
-                if r['date_last_product_added'] == "1-01-01":
-                    r['date_last_product_added'] = ""
-                coop_logger.info(str(r))
+                if precision != 'simple':
+                    if r['ongoing_inv_start_datetime'] == "1-01-01 00:00:00":
+                        r['ongoing_inv_start_datetime'] = ""
+                    if r['date_last_product_added'] == "1-01-01":
+                        r['date_last_product_added'] = ""
+                    coop_logger.info(str(r))
                 shelfs.append(r)
         except Exception as e:
             coop_logger.error("Rayons, get_all : %s", str(e))