Angular2 RC BaseRequestOption构造函数注入 [英] Angular2 RC BaseRequestOption Constructor Injection

问题描述

我不知道我是否缺少一些东西，但注入一个自定义baserequestoptions类的构造函数在Beta 17中对我工作正常，但在移动到RC1后，这种方法似乎不再工作了。

我创建了一个plunkr来说明webapibaseurl现在是未定义的（同样的代码方法，但Beta 17的引用工作）：

https://embed.plnkr.co/usOljRDLap9RlLd3RIBd/ p>

任何想法？

解决方案

这里是我使用的自定义选项类：

  import'baseRequestOptions，RequestOptions，RequestOptionsArgs} from'@ angular / http'; 
 
 export class AppRequestOptions extends BaseRequestOptions {
 constructor（）{
} 
 
 merge（options？：RequestOptionsArgs）：RequestOptions {
 options .url ='https://www.test.org'+ options.url; 
 return super.merge（options）; 
} 
} 
  

我用这种方式注册：

  bootstrap（App，[
 HTTP_PROVIDERS，
 provide（RequestOptions，{useClass：AppRequestOptions}）
] ）; 
  

查看此plunkr： https://plnkr.co/edit/MK30JR2qK8aJIGwNqMZ5?p=preview 。

编辑

似乎在这种类的依赖注入级别有一个问题。我打开了一个问题： https://github.com/angular/angular/issues/8925。

I don’t know whether I am missing something but injecting the constructor of a custom baserequestoptions class was working fine for me in Beta 17 but after moving to RC1 this approach doesn’t seem to work any more.

I have created a plunkr to illustrate that the webapibaseurl now comes through as undefined (the same code approach but with Beta 17 references worked):

https://embed.plnkr.co/usOljRDLap9RlLd3RIBd/

Any ideas?

解决方案

This still works for me. Here is the custom option class I used:

import {BaseRequestOptions, RequestOptions, RequestOptionsArgs} from '@angular/http';

export class AppRequestOptions extends BaseRequestOptions {
  constructor() {
  }

  merge(options?:RequestOptionsArgs):RequestOptions {
    options.url = 'https://www.test.org' + options.url;
    return super.merge(options);
  }
}

and I register it this way:

bootstrap(App, [
  HTTP_PROVIDERS,
  provide(RequestOptions, {useClass: AppRequestOptions})
]);

See this plunkr: https://plnkr.co/edit/MK30JR2qK8aJIGwNqMZ5?p=preview.

Edit

It seems that there is a problem at the level of dependency injection for such class. I opened an issue: https://github.com/angular/angular/issues/8925.

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