firebase - 如何使用 firestore 在当前用户文档中添加数据？

Question

Future<DocumentReference> getUserDoc() async {
 final FirebaseAuth _auth = FirebaseAuth.instance;
 final Firestore _firestore = Firestore.instance;

 FirebaseUser user = await _auth.currentUser();
 DocumentReference ref = _firestore.collection('users').document(user.uid);
 return ref;
}

我无法在文档中添加数据。

这是我在 firestore 中输入数据的代码。请帮忙，我是 flutter 的新手

return ref.setData(data);

错误是

The return type 'Future' isn't a 'Future', as defined by the method 'getUserDoc'.dart(return_of_invalid_type)

Answer 1

这应该有效:

  Future<void> getUserDoc() async {
    final FirebaseAuth _auth = FirebaseAuth.instance;
    final Firestore _firestore = Firestore.instance;

    FirebaseUser user = await _auth.currentUser();
    DocumentReference ref = _firestore.collection('users').document(user.uid);
    return ref.setData({'UID': user.uid});
  }