javascript - Firestore array-contains-any is not working properly

Question

"@angular/fire": "5.2.3", 
"firebase": "7.4.0",

Note: members is an array and 0,1,2 is map data structures.

service.ts

 getUserChatGroups(uid: string): Observable<DocumentChangeAction<MessageGroupMemberModel>[]> {
    return this.afs.collection<MessageGroupMemberModel>(`messageGroups`, ref => ref.where('members', 'array-contains-any', [uid])).snapshotChanges();
  }

page.ts

 init(): void {
    const uid: string = this.authService.getUserUid();
    this.chatService.getUserChatGroups(uid).subscribe(res => {
      console.log(res);
    },
      err => console.log(err),
      () => console.log('request?completed')
    );

  }

No errors. But it doesn't return any value. But it has values. Is there something wrong with my query?

Answer 1

Waitting for answers