bugfixes

src/app/entities/travel.ts

@@ -4,16 +4,16 @@ import { User, UserId } from './user';
 export type TravelId = number;
 
 export class Travel extends TravelDto {
-  constructor(travelDto: TravelDto) {
-    super(travelDto.id,
-      travelDto.driverInfo,
-      travelDto.travelersInfo,
-      travelDto.departureDate,
-      travelDto.origin,
-      travelDto.destination,
-      travelDto.places,
-      travelDto.matrixRoomId,
-      travelDto.description);
+  constructor(travelDto: TravelDto = null) {
+    super(travelDto?.id,
+      travelDto?.driverInfo,
+      travelDto?.travelersInfo,
+      travelDto?.departureDate,
+      travelDto?.origin,
+      travelDto?.destination,
+      travelDto?.places,
+      travelDto?.matrixRoomId,
+      travelDto?.description);
   }
 
   availablePlaces(): number {

src/app/pages/edit-travel/edit-travel.component.ts

@@ -28,7 +28,7 @@ export class EditTravelComponent implements OnInit {
       this.apiService.getTravel(travelId)
         .subscribe(res => {
           if (res.success) {
-            this.travel = res.data;
+            this.travel = new Travel(res.data);
           }
           else {
             console.error('Error getting travel ' + travelId + ': ' + res.error.code + ' ' + res.error.msg);