Adde Aircraft class and associate students with aircrafts

cntmanage/flightslot/admins/mission_adm.py

@@ -20,12 +20,12 @@ class MissionProfileResource(ModelResource):
     duration = fields.Field(attribute="duration", column_name="duration")
 
 # Cleanup fields before entering
-    def before_import_row(self, row: dict[str, str | Any], **kwargs) -> None:
+    def before_import_row(self, row: dict[str, str | Any], **kwargs):
         row["mtype"] = SafeText(row["mtype"].upper().strip())
         row["mnum"] = SafeText(row["mnum"].upper().strip())
         h, m, _ = row["duration"].split(":")
         row["duration"] = timedelta(hours=float(h), minutes=float(m))
-        return super().before_import_row(row, **kwargs)
+        super().before_import_row(row, **kwargs)
 
     class Meta:
         model = MissionProfile