firebase 配置文件.dart上的_TypeError(类型“String”不是类型“int”(属于“index”)的子类型)

pu3pd22g 于 2023-02-13 发布在其他

关注(0)|答案(4)|浏览(163)

我绑打电话给用户出现在个人资料页面的应用程序块时，我修复了它，我面临着其他问题，这是一个如果有任何解决方案可以帮助我

import 'package:flutter/foundation.dart';

class UserModel {
  String? uid;
  String? Username;
  String? email;
  String? photoUrl;
  

  UserModel(
      {this.uid, this.email, this.Username,  this.photoUrl});

  // receving data from the server
  factory UserModel.fromMap(Map) {
    return UserModel(
      uid: Map['userId'],
      Username: Map['Username'],
      email: Map['email'],
      photoUrl: Map['photoUrl'],
    );
  }

  // /// sending data to firestore
  Map<String, dynamic> toMap() {
    return {
      'userId': uid,
      'Username': Username,
      'email': email,
      'photoUrl': photoUrl,
    };
  }
}

错误图片

firebase

来源：https://stackoverflow.com/questions/74245996/typeerror-type-string-is-not-a-subtype-of-type-int-of-index-on-profile

4条答案

按热度按时间

8dtrkrch1#

不要使用Map作为变量名，它是一个DataType

factory UserModel.fromMap(map) {
    return UserModel(
      uid: map['userId'],
      Username: map['Username'],
      email: map['email'],
      photoUrl: map['photoUrl'],
    );
  }

赞(0）回复(0）举报 2023-02-13

wrrgggsh2#

通过使用此：

// receving data from the server
  factory UserModel.fromMap(Map) {
    return UserModel(
      uid: Map['userId'],
      Username: Map['Username'],
      email: Map['email'],
      photoUrl: Map['photoUrl'],
    );
  }

你正在引用Map作为它的类型，所以它抛出错误.你需要引用一个Map对象，而不是Map类型，所以尝试这个：

// receving data from the server
  factory UserModel.fromMap(Map data) {
    return UserModel(
      uid: data['userId'],
      Username: data['Username'],
      email: data['email'],
      photoUrl: data['photoUrl'],
    );
  }

赞(0）回复(0）举报 2023-02-13

dz6r00yl3#

当你需要声明响应为Map〈String，dynamic〉的数据时，即使在这样做之后，如果错误仍然存在，尝试添加Map['userId].toString（）||将['userId]Map为字符串。请参考以下代码

final favoriteResponse = await http.get(url);
  final favoriteData =
      json.decode(favoriteResponse.body) as Map<String, dynamic>?;
  final List<Product> loadedProducts = [];
  extractedData?.forEach((prodId, prodData) {
    loadedProducts.add(Product(
        id: prodId,
        title: prodData['title'],
        description: prodData['description'],
        price: prodData['price'],
        imageUrl: prodData['imageUrl'],
        isFavorite:
            favoriteData == null ? false : favoriteData[prodId] ?? false));
  });
  _items = loadedProducts;
  notifyListeners();
}

赞(0）回复(0）举报 2023-02-13

qeeaahzv4#

确保
用户ID
是你消防站里的一根绳子

赞(0）回复(0）举报 2023-02-13