Question

我有一个像下面这样的异步方法。它在[ts] 'await' expression is only allowed within an async function.显示错误await userProfile.set({。你能告诉我如何理清吗？

注意：也许是因为我试图在promise内拨打observable。任何线索？

 async loginWithGoogle(): Promise<void> {
    const result = await this.afAuth.auth.signInWithPopup(new firebase.auth.GoogleAuthProvider());
    const userId: string = result.uid;
    const userProfile: AngularFirestoreDocument<UserProfile> = this.fireStore.doc(`userProfile/${userId}`);
    const userProfiles: AngularFirestoreCollection<UserProfile> = this.fireStore.collection('userProfile/', ref => ref.where('email', '==', result.email));
    const userProfiles$: Observable<UserProfile[]> = userProfiles.valueChanges();
    userProfiles$.subscribe(res => {
      if (res == null) {
        await userProfile.set({ //here it shows error
          id: userId,
          email: result.email,
          creationTime: moment().format(),
          lastSignInTime: moment().format()
        });
      }
    });
  }

Answer 1

您的主要功能是异步，但您在箭头函数中使用await，该函数未声明为async

userProfiles$.subscribe(async res => {
  if (res == null) {
    await userProfile.set({
...

'await'表达式只允许在异步函数中使用

1 个答案: