[DURACOM-282] fix issue with submission edit page when providing a not existing workspaceitem

Author: atarix83

src/app/core/submission/submission-parent-breadcrumb.service.ts

@@ -11,7 +11,10 @@ import { DSOBreadcrumbsService } from '../breadcrumbs/dso-breadcrumbs.service';
 import { getDSORoute } from '../../app-routing-paths';
 import { SubmissionService } from '../../submission/submission.service';
 import { CollectionDataService } from '../data/collection-data.service';
-import { hasValue } from '../../shared/empty.util';
+import {
+  hasValue,
+  isEmpty,
+} from '../../shared/empty.util';
 
 /**
  * Service to calculate the parent {@link DSpaceObject} breadcrumbs for a {@link SubmissionObject}
@@ -35,6 +38,10 @@ export class SubmissionParentBreadcrumbsService implements BreadcrumbsProviderSe
    * @param submissionObject The {@link SubmissionObject} for which the parent breadcrumb structure needs to be created
    */
   getBreadcrumbs(submissionObject: SubmissionObject): Observable<Breadcrumb[]> {
+    if (isEmpty(submissionObject)) {
+      return observableOf([]);
+    }
+
     return combineLatest([
       (submissionObject.collection as Observable<RemoteData<Collection>>).pipe(
         getFirstCompletedRemoteData(),

src/app/core/submission/submission-rest.service.ts

@@ -19,8 +19,10 @@ import { HALEndpointService } from '../shared/hal-endpoint.service';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
 import { getFirstCompletedRemoteData } from '../shared/operators';
 import { URLCombiner } from '../url-combiner/url-combiner';
+import { ErrorResponse } from '../cache/response.models';
 import { RemoteData } from '../data/remote-data';
 import { SubmissionResponse } from './submission-response.model';
+import { RequestError } from '../data/request-error.model';
 import { RestRequest } from '../data/rest-request.model';
 
 /**
@@ -49,7 +51,7 @@ export class SubmissionRestService {
       getFirstCompletedRemoteData(),
       map((response: RemoteData<SubmissionResponse>) => {
         if (response.hasFailed) {
-          throw new Error(response.errorMessage);
+          throw new ErrorResponse({ statusText: response.errorMessage, statusCode: response.statusCode } as RequestError);
         } else {
           return hasValue(response.payload) ? response.payload.dataDefinition : response.payload;
         }