在const angular上創建泛型類型

Question

我遇到錯誤處理程序的問題。 我正在嘗試在我的服務中創建一個通用的retryPipeline：當調用失敗時，它會在throw和error之前重試3次。 到現在為止還挺好。 如果我把代碼放在方法中，它會工作，如下所示：

  getMun(id_del: number, id_muno: number): Observable<Mun> {

    let urlAPIMun = urlAPI;
    urlAPIMun += '/' + id_del + '/mun' + '/' + id_mun + '?flag_geometry=true';
    return this._http.get<Mun>(urlAPIMunicipios).pipe(
     //   tap(() => console.log('HTTP request executed')),
      retryWhen(errors => errors.pipe(
        // Concat map to keep the errors in order and make sure they
        // aren't executed in parallel
        concatMap((e: HttpErrorResponse, i) =>
          // Executes a conditional Observable depending on the result
          // of the first argument
          iif(
            () => i >= 3,
            // If the condition is true we throw the error (the last error)
            throwError(e.error.errores),
            // Otherwise we pipe this back into our stream and delay the retry
            of(e).pipe(delay(5000))
          )
        ))));
  }

我正在嘗試提取管道內的代碼來聲明一個const然后在我的服務調用中調用const：

const RETRYPIPELINE =
  retryWhen((errors) =>
    errors.pipe(
      concatMap((e: HttpErrorResponse, i) =>
          () => i >= 3,
          throwError(e.error.errores),
          of(e).pipe(delay(5000))
        )
      )
    )
  );

return this._http.get<Mun>(urlAPIMunicipios).pipe(RETRYPIPELINE);

但是我收到了這個錯誤：

錯誤TS2322：類型'Observable <{}>'不能分配給'Observable'類型。 類型'{}'缺少類型'Mun'的以下屬性：id_mun，id_del，den

有沒有辦法創建一個通用的const，它能夠與任何方法一致，雖然該方法返回一個類型值？ 提前致謝

Answer 1

最后，我修復了這個答案 ：

在retryWhen添加一個retryWhen ，最終解決了我的問題：

export const RETRYPIPELINE =
  retryWhen<any>((errors) =>
    errors.pipe(
      // Use concat map to keep the errors in order and make sure they
      // aren't executed in parallel
      concatMap((e: HttpErrorResponse, i) =>
        // Executes a conditional Observable depending on the result
        // of the first argument
        iif(
          () => i >= 3,
          // If the condition is true we throw the error (the last error)
          throwError(e.error.errores),
          // Otherwise we pipe this back into our stream and delay the retry
          of(e).pipe(delay(5000))
        )
      )
    )
  )

;