在颤振中使用woocommerce api映射产品列表中的图像列表的问题

Question

class ProductModel {
  late String name;
  late int id;
  late String status;
  late String price;
  late List<Images> images;

  ProductModel(
    this.name,
    this.id,
    this.status,
    this.images,
    this.price,
  );

  ProductModel.fromJson(Map<String, dynamic> json) {
    name = json['name'];
    id = json['id'];
    status = json['status'];
    //images = json['images'];
    images = json['image'];
    if (json['images'] != null) {
      images = new List<Images>(); // error on List<Images>() "The default 'List' constructor //isn't available when null safety is enabled.

      json['images'].forEach((v) {
        images.add(new Images.fromJson(v));
      });
    }
    price = json['price'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['name'] = this.name;
    data['id'] = this.id;
    data['status'] = this.status;
    if (this.images != null) {
      data['images'] = this.images.map((v) => v.toJson()).toList();
    }
    data['price'] = this.price;
    return data;
  }
}

// ignore: camel_case_types
class Images {
  late int id;
  late String src;
  late String title;

  Images({
    this.id = 0,
    this.src = "",
    this.title = "",
  });

  Images.fromJson(Map<String, dynamic> json) {
    id = json['id'];
    src = json['src'];
    title = json['title'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['id'] = this.id;
    data['src'] = this.src;
    data['title'] = this.title;
    return data;
  }
}

我想在 Flutter 应用中列出我的 Woocommerce 网站的产品，但是在代码中出现错误，请帮助。请指导我将 JSON 建模为 Dart 类的最佳方法。尝试使用 https://javiercbk.github.io/json_to_dart/ 在线转换，但这会产生很多错误

Answer 1

看来你初始化列表不正确。

应该是：

images = <Images>[];

此外，您不再需要使用 new 关键字进行初始化。