标签: json-annotation

我的应用程序运行正常，但在 pub Upgrade --major-versions 之后，我在所有型号上都遇到问题。型号示例：

import 'package:app_220/models/Leads/LeadFieldModel.dart';
import 'package:flutter/foundation.dart';
import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:intl/intl.dart';

part 'LeadModel.freezed.dart';
part 'LeadModel.g.dart';

@freezed
abstract class LeadModel with _$LeadModel {
  const LeadModel._();

  @JsonSerializable(fieldRename: FieldRename.snake)
  const factory LeadModel({
    required int id,
    int? formId,
    @JsonKey(name: 'contact__first_name', defaultValue: '')
    @Default('')
        String contactFirstName,
    @JsonKey(name: 'contact__last_name', defaultValue: '')
    @Default('')
        String contactLastName,
    @JsonKey(name: 'contact__email', defaultValue: '')
    @Default('')
        String contactEmail,
    @JsonKey(name: 'contact__phone', defaultValue: '')
    @Default('')
        String contactPhone,
    int? staffId,
    @Default('') String staffLastName,
    DateTime? creationTime,
    @Default('') String sourceUrl,
    @Default('') String sourceIp,
    @Default(0) int viewed, …