Better deal with non-existing documents when searching

src-ui/src/app/components/search/search.component.html

@@ -16,11 +16,13 @@
 
 <div *ngIf="!errorMessage" [class.result-content-searching]="searching" infiniteScroll (scrolled)="onScroll()">
     <p i18n>{resultCount, plural, =0 {No results} =1 {One result} other {{{resultCount}} results}}</p>
-    <app-document-card-large *ngFor="let result of results"
-        [document]="result.document"
-        [details]="result.highlights"
-        [searchScore]="result.score / maxScore"
-        [moreLikeThis]="true">
+    <ng-container *ngFor="let result of results">
+        <app-document-card-large *ngIf="result.document"
+            [document]="result.document"
+            [details]="result.highlights"
+            [searchScore]="result.score / maxScore"
+            [moreLikeThis]="true">
+        </app-document-card-large>
+    </ng-container>
 
-</app-document-card-large>
 </div>

src-ui/src/app/services/rest/search.service.ts

@@ -28,7 +28,11 @@ export class SearchService {
     }
     return this.http.get<SearchResult>(`${environment.apiBaseUrl}search/`, {params: httpParams}).pipe(
       map(result => {
-        result.results.forEach(hit => this.documentService.addObservablesToDocument(hit.document))
+        result.results.forEach(hit => {
+          if (hit.document) {
+            this.documentService.addObservablesToDocument(hit.document)
+          }
+        })
         return result
       })
     )