我有这个代码片段:
SubmitTransaction(transNumber: string, transactionRequest: ITransactionRequestObj): Observable<TransactionResponse> {
this.body = JSON.stringify(transactionRequest);
this.headers = new HttpHeaders().set('Content-Type', 'application/json');
this.headers.append('Accept', 'application/json');
this.options = new RequestOptions({headers: this.headers});
return this.http.post<TransactionResponse>(this.baseUrl + '/transactions/' + transNumber + '/new', this.body, this.options)
.pipe(catchError((e) => this.errorHandler(e)));
}
我所做的就是将我的项目从 Angular 5 升级到 Angular 6 并进行更改.catch((e) => this.errorHandler(e));
to .pipe(catchError((e) => this.errorHandler(e)));
。但是,对于此特定方法,我收到以下 TypeScript 错误。
Error:
[ts]
Type 'Observable<HttpEvent<TransactionResponse>>' is not assignable to type 'Observable<TransactionResponse>'.
Type 'HttpEvent<TransactionResponse>' is not assignable to type 'TransactionResponse'.
Type 'HttpSentEvent' is not assignable to type 'TransactionResponse'.
Property '_transactionNumber' is missing in type 'HttpSentEvent'.
我不确定在这种情况下我应该做什么。上面的代码片段在 Angular 5 中工作。我需要做什么才能在 Angular 6 中修复它?
EDIT:
errorHandler(error: HttpErrorResponse) {
return throwError(error.message || 'Server Error');
}
我注意到如果我不使用 HttpHeaders,它会起作用:
SubmitTransaction(transNumber: string, transactionRequest: ITransactionRequestObj): Observable<TransactionResponse> {
this.body = JSON.stringify(transactionRequest);
this.headers = new HttpHeaders().set('Content-Type', 'application/json');
this.headers.append('Accept', 'application/json');
this.options = new RequestOptions({headers: this.headers});
return this.http.post<TransactionResponse>(this.baseUrl + '/transactions/' + transNumber + '/new', transactionRequest)
.pipe(catchError((e) => this.errorHandler(e)));
}
但是,我可能需要使用 HttpHeaders...这种情况下的解决方法是什么?