在Flutter中，当文档id等于当前登录的用户id时，是否获取firestore数据？

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Firestore Example'),
        ),
        body: FirestoreExample(),
      ),
    );
  }
}

class FirestoreExample extends StatefulWidget {
  @override
  _FirestoreExampleState createState() => _FirestoreExampleState();
}

class _FirestoreExampleState extends State<FirestoreExample> {
  final FirebaseFirestore _firestore = FirebaseFirestore.instance;
  final String _currentUserId = 'your_current_user_id'; // 替换为当前登录用户的ID

  @override
  Widget build(BuildContext context) {
    return Center(
      child: ElevatedButton(
        onPressed: () async {
          await fetchData();
        },
        child: Text('Fetch Data'),
      ),
    );
  }

  Future<void> fetchData() async {
    try {
      QuerySnapshot querySnapshot = await _firestore.collection('users')
          .where('id', isEqualTo: _currentUserId)
          .get();

      if (querySnapshot.docs.isNotEmpty) {
        for (QueryDocumentSnapshot document in querySnapshot.docs) {
          print('Document data: ${document.data()}');
        }
      } else {
        print('No matching documents found');
      }
    } catch (e) {
      print('Error fetching data: $e');
    }
  }
}