如何在Flutter与Firebase项目中存储并使用营业时间数据

云上老周

2026-10-6

问题核心原因

你的类定义存在低级错误：类名是Business，但构造函数命名成了CommentModel，首先要修正这个问题
Firestore（Firebase数据库）所有的JSON键默认都是字符串类型，你本地声明的openingHours是Map<int, List<int>>，键类型不匹配无法直接赋值
Firestore返回的列表值是List<dynamic>类型，没有做类型转换直接赋值给List<int>会触发类型异常
上传的时候int类型的键不会自动转成字符串，Firestore会识别失败

修正后的完整Business类代码

class Business{
  String businessId;
  String name;
  String photoUrl;
  Map<int, List<int>> openingHours;

  // 修正构造函数命名
  Business({
    this.name,
    this.businessId,
    this.photoUrl,
    this.openingHours
  });

  Business.fromJson(Map<String, dynamic> json) {
    name = json['name'];
    businessId = json['businessId'];
    photoUrl = json['photoUrl'];
    // 处理openingHours类型转换
    if (json['openingHours'] != null) {
      openingHours = {};
      json['openingHours'].forEach((key, value) {
        // 字符串键转int类型
        int weekDay = int.parse(key);
        // 值非空的话把dynamic列表转成List<int>
        List<int> hours = value?.cast<int>();
        openingHours[weekDay] = hours;
      });
    }
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['name'] = name;
    data['businessId'] = businessId;
    data['photoUrl'] = photoUrl;
    if (openingHours != null) {
      // int类型键转字符串，符合Firestore要求
      data['openingHours'] = openingHours.map((key, value) => MapEntry(key.toString(), value));
    }
    return data;
  }
}