Firestore 查询不会 return 附近有 Geo flutter fire 的位置

Question

我正在尝试获取附近的位置。在这里，假设我在比佛利山庄，并且在我的 firestore 中存储了洛杉矶的纬度和经度。两个地方相距 12 英里 = 19.3 公里。在 GeoFlutterFire 中，我提供了 10Km 作为半径，以 Beverly Hills 为中心。不过还是提供了LA的数据。

这是代码

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

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final geo = Geoflutterfire();
  final _firestore = FirebaseFirestore.instance;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      body: Container(
        child: geoFlut(),
      ),
    );
  }

  geoFlut() {
    GeoFirePoint myLocation = geo.point(latitude: 34.0522, longitude: 118.2437);
    _firestore
        .collection('locations')
        .add({'name': 'LA', 'position': myLocation.data});

    GeoFirePoint center = geo.point(latitude: 34.072165, longitude: 118.402624);

    var collectionReference = _firestore.collection('locations');

    double radius = 10;
    String field = 'position';

    Stream<List<DocumentSnapshot>> stream = geo
        .collection(collectionRef: collectionReference)
        .within(center: center, radius: radius, field: field);

    stream.listen((List<DocumentSnapshot> documentList) {
      // print(stream.length);
      print('Here');
      print(documentList[0].data());
    });
  }
}

这段代码有什么问题？帮我解决这个问题！

Answer 1

是的，经过多次错误后我将其整理出来。问题是在添加 strictmode: true 后我还没有使用 strict mode 的查询。问题告一段落。

Firestore 查询不会 return 附近有 Geo flutter fire 的位置

Firestore query doesn't return nearby locations with Geo flutter fire

location

dart

firebase

flutter

google-cloud-firestore