如何在打字稿中代表Guid？

问题描述

假设我有这个C＃类

public class Product
{
   public Guid Id { get; set; }
   public string ProductName { get; set; }
   public Decimal Price { get; set; }
   public int Level { get; set; }
}

等效的打字稿如下：

export class Product {
  id: ???;
  productName: string;
  price: number;
  level: number;
}

如何在打字稿中表示Guid？

How to represent Guid in typescript?

推荐答案

导游通常在Javascript中用字符串表示，因此表示GUID的最简单方法是字符串。通常，当序列化为JSON时，它以字符串表示，因此使用字符串将确保与服务器中的数据兼容。

Guids are usually represented as strings in Javascript, so the simplest way to represent the GUID is as a string. Usually when serialization to JSON occurs it is represented as a string, so using a string will ensure compatibility with data from the server.

使GUID与简单字符串不同，则可以使用品牌类型：

To make the GUID different from a simple string, you could use branded types:

type GUID = string & { isGuid: true};
function guid(guid: string) : GUID {
    return  guid as GUID; // maybe add validation that the parameter is an actual guid ?
}
export interface Product {
    id: GUID;
    productName: string;
    price: number;
    level: number;
}

declare let p: Product;
p.id = "" // error
p.id = guid("guid data"); // ok
p.id.split('-') // we have access to string methods

此还有更多内容关于品牌类型的讨论。此外，打字稿编译器还将商标类型用于类似于此用例。

This article has a bit more of a discussion on branded types. Also the typescript compiler uses branded types for paths which is similar to this use case.

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