类型 Observable<boolean> 不可分配给类型 Observable<HttpResponse<boolean>>

Question

我正在开发一个 Angular 6 项目，在将代码从使用 Http 更改为 HttpClient 时，我收到以下错误：

当我尝试这样做时：

 verifyEmail(email: string, verificationCode: string): Observable<HttpResponse<boolean>> {
    return this._http.get<boolean>(`${this.serviceUrl}emailVerification?email=${email}&verification_code=${verificationCode}`, { observe: 'response' }).pipe(
      map((response: HttpResponse<boolean>) => {
        return resp.status === 204;
      }),
      catchError(this.handleError));
  }

我得到了错误

Type Observable<boolean> is not assignable to type Observable<HttpResponse<boolean>>

反过来说：

deleteCollection(collection: Collection): Observable<HttpResponse<boolean>> {
    return this._http.delete<boolean>(this.serviceUrl + collection.id, this.requestOptionsResponse).pipe(
      map((response: HttpResponse<boolean>) => {
        return response.status === 204;
      }),
      catchError(this.handleError),);
  }

报告没有错误，this.requestOptionsResponse 为

private setRequestOptionsResponse() {
    let headers = new HttpHeaders({
      'Accept'      : 'application/json',
      'Content-Type': 'application/json'
    });
    this.requestOptionsResponse = { headers: headers, observe: 'response', withCredentials: true}
}

Answer 1

无需在类型声明中包含HttpResponse：

verifyEmail(email: string, verificationCode: string): Observable<boolean> {
   ...
}