small fixes

src/app/+search-page/search-filters/search-filter/search-fixed-filter.service.ts

@@ -11,6 +11,7 @@ import { ResponseCacheService } from '../../../core/cache/response-cache.service
 import { ResponseParsingService } from '../../../core/data/parsing.service';
 import { GenericConstructor } from '../../../core/shared/generic-constructor';
 import { FilteredDiscoveryPageResponseParsingService } from '../../../core/data/filtered-discovery-page-response-parsing.service';
+import { hasValue } from '../../../shared/empty.util';
 
 @Injectable()
 export class SearchFixedFilterService {
@@ -23,31 +24,34 @@ export class SearchFixedFilterService {
 
   }
 
-  getQueryByFilterName(filterName?: string): Observable<string> {
-    const requestObs = this.halService.getEndpoint(this.queryByFilterPath).pipe(
-      map((url: string) => {
-        url += ('/' + filterName);
-        const request = new GetRequest(this.requestService.generateRequestId(), url);
-        return Object.assign(request, {
-          getResponseParser(): GenericConstructor<ResponseParsingService> {
-            return FilteredDiscoveryPageResponseParsingService;
-          }
-        });
-      }),
-    );
-
-    const responseCacheObs = requestObs.pipe(
-      flatMap((request: RestRequest) => this.responseCache.get(request.href))
-    );
-
-    // get search results from response cache
-    const filterQuery: Observable<string> = responseCacheObs.pipe(
-      map((entry: ResponseCacheEntry) => entry.response),
-      map((response: FilteredDiscoveryQueryResponse) =>
-        response.filterQuery
-      ));
-
-    return filterQuery;
+  getQueryByFilterName(filterName: string): Observable<string> {
+    if (hasValue(filterName)) {
+      const requestObs = this.halService.getEndpoint(this.queryByFilterPath).pipe(
+        map((url: string) => {
+          url += ('/' + filterName);
+          const request = new GetRequest(this.requestService.generateRequestId(), url);
+          return Object.assign(request, {
+            getResponseParser(): GenericConstructor<ResponseParsingService> {
+              return FilteredDiscoveryPageResponseParsingService;
+            }
+          });
+        }),
+      );
+
+      const responseCacheObs = requestObs.pipe(
+        flatMap((request: RestRequest) => this.responseCache.get(request.href))
+      );
+
+      // get search results from response cache
+      const filterQuery: Observable<string> = responseCacheObs.pipe(
+        map((entry: ResponseCacheEntry) => entry.response),
+        map((response: FilteredDiscoveryQueryResponse) =>
+          response.filterQuery
+        ));
+
+      return filterQuery;
+    }
+    return Observable.of(undefined);
   }
 
 }

src/app/core/data/search-response-parsing.service.ts

@@ -16,7 +16,7 @@ export class SearchResponseParsingService implements ResponseParsingService {
   }
 
   parse(request: RestRequest, data: DSpaceRESTV2Response): RestResponse {
-    const payload = data.payload._embedded.searchResult;
+    const payload = data.payload/*._embedded.searchResult*/;
     const hitHighlights = payload._embedded.objects
       .map((object) => object.hitHighlights)
       .map((hhObject) => {