获取Typescript接口的键作为字符串数组 [英] Get keys of a Typescript interface as array of strings

问题描述

我在Lovefield有很多桌子，他们各自的界面都有他们所拥有的列。
例子：

  export interface IMyTable {
 id：number; 
 title：string; 
 createdAt：Date; 
 isDeleted：boolean; 
} 
  

我想把这个接口的属性名称放在一个像这样的数组中这个：


var IMyTable = [id，title，createdAt，isDeleted];



我不能直接根据接口 IMyTable 创建一个对象/数组，这应该可以解决问题因为我要获取接口名称这些表是动态的。因此，我需要在接口中迭代这些属性并从中获取数组。


如何实现此结果。

解决方案

从TypeScript 2.3开始（或者我应该说2.4，如2.3中这个功能包含一个错误，已在typescript@2.4-dev中修复，你可以创建一个自定义变换器来实现你想要做的事情。

<实际上，我已经创建了这样一个自定义变换器，它可以实现以下目的。

https://github.com/kimamula/ts-transformer-keys

 从'ts-transformer-keys'导入{keys}; 
 
 interface Props {
 id：string; 
 name：string; 
年龄：数量; 
} 
 const keysOfProps = keys< Props>（）; 
 
 console.log（keysOfProps）; // ['id'，'name'，'age'] 
  

不幸的是，定制变换器目前是不那么容易使用。您必须将它们与TypeScript转换API一起使用，而不是执行tsc命令。有问题请求自定义变换器的插件支持。

I've a lot of tables in Lovefield and their respective Interfaces for what columns they have.
Example:

export interface IMyTable {
  id: number;
  title: string;
  createdAt: Date;
  isDeleted: boolean;
}

I'd like to have the property names of this interface in an array like this:

var IMyTable = ["id", "title", "createdAt", "isDeleted"];

I cannot make an object/array based on the interface IMyTable directly which should do the trick because i'd be getting the interface names of the tables dynamically. Hence i need to iterate over these properties in the interface and get an array out of it.

How do i achieve this result.

解决方案

As of TypeScript 2.3 (or should I say 2.4, as in 2.3 this feature contains a bug which has been fixed in typescript@2.4-dev), you can create a custom transformer to achieve what you want to do.

Actually, I have already created such a custom transformer, which enables the following.

https://github.com/kimamula/ts-transformer-keys

import { keys } from 'ts-transformer-keys';

interface Props {
  id: string;
  name: string;
  age: number;
}
const keysOfProps = keys<Props>();

console.log(keysOfProps); // ['id', 'name', 'age']

Unfortunately, custom transformers are currently not so easy to use. You have to use them with the TypeScript transformation API instead of executing tsc command. There is an issue requesting a plugin support for custom transformers.

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