如何使用客户类型适配器（Hive/Flutter）？答案

【问题标题】：How to use Customer TypeAdapter (Hive/Flutter)?如何使用客户类型适配器（Hive/Flutter）？
【发布时间】：2021-07-01 06:02:18
【问题描述】：

我不太确定如何在 Flutter 中使用 Hive DB。我的意思是我有一个 ```WooCustomer`` 模型类，我想将它存储在本地（一旦客户登录）。

我的问题是，我必须将 WooCustomer 转换为 HiveObject 然后创建 TypeAdapter 还是直接创建 TypeAdapter<WooCustomer>？

PS：WooCustomer 是一个外部 pkg。

这是实现TypeAdapter<WooCustomer>的正确方法吗？

class DatabaseAdapterService extends TypeAdapter<WooCustomer> {
  @override
  final int typeId = 0;

  @override
  WooCustomer read(BinaryReader reader) {
    return WooCustomer()
      ..id = reader.read()
      ..username = reader.read()
      ..firstName = reader.read()
      ..lastName = reader.read()
      ..email = reader.read()
      ..password = reader.read()
      ..avatarUrl = reader.read()
      ..role = reader.read()
      ..dateCreated = reader.read()
      ..dateCreatedGmt = reader.read()
      ..dateModified = reader.read()
      ..dateModifiedGmt = reader.read()
      ..isPayingCustomer = reader.read()
      ..links = reader.read()
      ..metaData = reader.read()
      ..billing = reader.read()
      ..shipping = reader.read();
  }

  @override
  void write(BinaryWriter writer, WooCustomer customer) {
    writer.write(customer.username);
    writer.write(customer.id);
    writer.write(customer.firstName);
    writer.write(customer.lastName);
    writer.write(customer.email);
    writer.write(customer.password);
    writer.write(customer.links);
    writer.write(customer.avatarUrl);
    writer.write(customer.role);
    writer.write(customer.metaData);
    writer.write(customer.dateCreated);
    writer.write(customer.dateCreatedGmt);
    writer.write(customer.dateModified);
    writer.write(customer.dateModified);
    writer.write(customer.dateModifiedGmt);
    writer.write(customer.isPayingCustomer);
    writer.write(customer.billing);
    writer.write(customer.shipping);
  }
}

【问题讨论】：

标签： flutter dart woocommerce flutter-hive

【解决方案1】：

是的，你总是可以做到的。首先获取这些插件，hive, hive_flutter 在 pubspec.yaml 中的依赖项中。并且在 pubspec 文件中还有一段 dev dependencies 有添加，hive_generator: ^1.1.0 build_runner: ^2.0.1

你是很好的开始...... 首先以这种格式编写您的课程，

import 'package:hive/hive.dart'; //import Hive

part 'weather_model.g.dart'; 
// Specify the Location of the type-adapter's Location (specifically)
//Add the .g.dart extension
// at last of the same File name you are using
// and add "part" keyword before all.

@HiveType(typeId: 0) //Add this Line
class WeatherModel {
  @HiveField(0) //Add this Line, From Index 0... and so on.
  String user_city; // Your Class Materials...
  @HiveField(1) //Add this Line, From Index 0... and so on.
  bool celciusMetric;

  

  WeatherModel(
      {this.user_city,
      this.celciusMetric}); //Constructor here.. 

  // flutter packages pub run build_runner build
}

阅读完上面的全部注释代码后，并根据您的用途实施。转到您的终端并在那里写信，flutter packages pub run build_runner build --delete-conflicting-outputs 就可以了，您会发现

现在转到您的main.dart 并导入 hive 的所有内容。

【讨论】：