NestJs 异步 httpService 调用 [英] NestJs async httpService call

问题描述

如何使用 NestJs 在 HttpService 上使用 Async/Await?下面的代码不起作用:

How can I use Async/Await on HttpService using NestJs? The below code doesn`t works:

async create(data) {
    return await this.httpService.post(url, data);
}

推荐答案

HttpModule 使用 Observable 而不是 Promise异步/等待.所有 HttpService 方法都返回 Observable>.

The HttpModule uses Observable not Promise which doesn't work with async/await. All HttpService methods return Observable<AxiosResponse<T>>.

因此，您可以将其转换为 Promise，然后在调用它时使用 await，或者只返回 Observable 并让调用者处理它.

So you can either transform it to a Promise and then use await when calling it or just return the Observable and let the caller handle it.

create(data): Promise<AxiosResponse> {
    return this.httpService.post(url, data).toPromise();
                                           ^^^^^^^^^^^^^
}

请注意，return await 几乎(除了 try catch)总是多余的.

Note that return await is almost (with the exception of try catch) always redundant.

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