Only return the selected fields from the new catalog

Signed-off-by: Dominik Henneke <dominik.henneke@sda-se.com>

.changeset/small-kings-repair.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': patch
+---
+
+Only return the selected fields from the new catalog.

plugins/catalog-backend/src/next/NextEntitiesCatalog.ts

@@ -133,8 +133,14 @@ export class NextEntitiesCatalog implements EntitiesCatalog {
       };
     }
 
+    const dbResponse = rows.map(e => JSON.parse(e.final_entity!));
+
+    const entities = dbResponse.map(e =>
+      request?.fields ? request.fields(e) : e,
+    );
+
     return {
-      entities: rows.map(e => JSON.parse(e.final_entity!)),
+      entities,
       pageInfo,
     };
   }