Bugfix

Adjust types and variable names

src/app/comment.service.ts

@@ -40,7 +40,7 @@ export class CommentService extends ErrorHandlingService {
     );
   }
 
-  searchComments(roomId: string, userId: number): Observable<Comment[]> {
+  searchComments(roomId: string, userId: string): Observable<Comment[]> {
     const url = `${this.commentsUrl}/?roomId=${roomId}&userId=${userId}`;
     return this.http.get<Comment[]>(url).pipe(
       tap (_ => ''),

src/app/comment.ts

 export class Comment {
   id: string;
   roomId: string;
-  userId: number;
+  userId: string;
   revision: string;
   subject: string;
   body: string;

src/app/create-comment/create-comment.component.ts

@@ -46,8 +46,9 @@ export class CreateCommentComponent implements OnInit {
       return;
     }
     this.commentService.addComment({
+      id: this.room.id + this.user.userId,
       roomId: this.room.id,
-      userId: this.user.id,
+      userId: this.user.userId,
       subject: subject,
       body: body,
       creationTimestamp: new Date(Date.now())