类型可观察不可<boolean>分配给类型可观察<HttpResponse<boolean>>

Question

我正在处理一个 Angular 6 项目，在将代码从使用Http更改为HttpClient时，我收到以下错误：

当我尝试做：

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));
}

我收到错误

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

相反，这：

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),);
}

报告未出现错误，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> {
...
}