Flutter Bloc：将Firestore数据提取到模型中

如何解决Flutter Bloc：将Firestore数据提取到模型中

我正在尝试从Firestore提取数据到我的模型中，但是失败了。

错误消息显示：

The method '[]' was called on null,tried calling : []("alamat")

这是我的代码：

存储库：

Future<FaskesModel> getFaskesFirestore(String id) async {
    var result = _firestore
        .collection("fakses")
        .doc(id)
        .get()
        .then((snapshot) => FaskesModel.fromSnapshot(snapshot));
    return result;
  }

FaskesModel类：

import 'package:cloud_firestore/cloud_firestore.dart';

class FaskesModel {
  String alamat;
  String id;
  String nama;
  GeoPoint alamatGeo;
  String deskripsi;
  String noTelepon;
  String noTeleponDarurat;
  String urlGambar;
  String website;

  FaskesModel(
      {this.alamat,this.alamatGeo,this.deskripsi,this.id,this.nama,this.noTelepon,this.noTeleponDarurat,this.urlGambar,this.website});

  factory FaskesModel.fromJson(Map<String,dynamic> json) => FaskesModel(
      alamat: json['alamat'] as String,alamatGeo: json['alamatGeo'] as GeoPoint,deskripsi: json['deskripsi'] as String,id: json['id'] as String,nama: json['nama'] as String,noTelepon: json['noTelepon'] as String,noTeleponDarurat: json['noTeleponDarurat'] as String,urlGambar: json['urlGambar'] as String,website: json['website'] as String);

  Map<String,dynamic> toJson() => {
        "alamat": alamat,"alamatGeo": alamatGeo,"deskripsi": deskripsi,"id": id,"nama": nama,"noTelepon": noTelepon,"noTeleponDarurat": noTeleponDarurat,"urlGambar": urlGambar,"website": website
      };

  FaskesModel.fromSnapshot(DocumentSnapshot documentSnapshot)
  
      : alamat = documentSnapshot.data()['alamat'],alamatGeo = documentSnapshot.data()['alamatGeo'],deskripsi = documentSnapshot.data()['deskripsi'],id = documentSnapshot.data()['id'],nama = documentSnapshot.data()['nama'],noTelepon = documentSnapshot.data()['noTelepon'],noTeleponDarurat = documentSnapshot.data()['noTeleponDarurat'],urlGambar = documentSnapshot.data()['urlGambar'],website = documentSnapshot.data()['urlGambar'];
}

在Bloc类中，我只是这样调用：

 FaskesModel faskesModel =
           await  _firebaseRepository.getFaskesFirestore(event.id);

我搜索了另一个问题，发现找到了DataSnapshot字段，只需致电snapShot.data.data，但就我而言，我才发现snapShot.data()。

再一次，我的问题的重点是如何从Firestore提取数据到FaskesModel

谢谢。

解决方法

根据评论将其发布为Community Wiki。

该问题似乎与使用快照将数据返回给类时，集合名称的错误输入有关。一旦类型正确，就可以正确地返回数据，并且不再打印null。