various improvements for shopping line item dialog

vue3/src/composables/useModelEditorFunctions.ts

@@ -3,6 +3,7 @@ import {onBeforeMount, ref} from "vue";
 import {EditorSupportedModels, GenericModel, getGenericModelFromString} from "@/types/Models";
 import {useI18n} from "vue-i18n";
 import {ResponseError} from "@/openapi";
+import {getNestedProperty} from "@/utils/utils";
 
 // TODO type emit parameter (https://mokkapps.de/vue-tips/emit-event-from-composable)
 // TODO alternatively there seems to be a getContext method to get the calling context (good practice?)
@@ -120,7 +121,8 @@ export function useModelEditorFunctions<T>(modelName: EditorSupportedModels, emi
         let name = ''
         if (editingObj.value.id) {
             modelClass.value.model.toStringKeys.forEach(key => {
-                name += ' ' + key.split('.').reduce((a, b) => a[b], editingObj.value);
+                let value = getNestedProperty(editingObj.value, key)
+                name += ' ' + ((value != null) ? value : '')
             })
         }