Firestore query subcollections

Question

I thought I read that you can query subcollections with the new Firebase Firestore, but I don\'t see any examples. For example I have my Firestore setup in the following way

Answer 1

You can always search like this:-

    this.key$ = new BehaviorSubject(null);

    return this.key$.switchMap(key =>
      this.angFirestore
        .collection("dances").doc("danceName").collections("songs", ref =>
          ref
            .where("songName", "==", X)
        )
        .snapshotChanges()
        .map(actions => {
          if (actions.toString()) {
            return actions.map(a => {
              const data = a.payload.doc.data() as Dance;
              const id = a.payload.doc.id;
              return { id, ...data };
            });
          } else {
            return false;
          }
        })
    );