[英]Type 'Observable<{}> is not assignable to type 'Observable<HttpEvent<any>>'
[英]'Observable<Observable<HttpEvent<any>>>' is not assignable to type 'Observable<any[]>'
我想調用一個 http 請求,它必須返回一個 observable,然后由一個方法訂閱,該方法以特定的時間間隔調用以進一步......
請考慮這個
訂閱者方法
startReceivingMeasurmentLiveDataV2(httpOptions: any,deviceId:number,seriesType:string,aggregation:string,from:string,to:string,pageSize:number,revert:boolean) {
debugger;
if (this.intervalSubscription) {
this.intervalSubscription.unsubscribe();
}
this.intervalSubscription = interval(200)
.pipe(
takeWhile(() => this.alive),
// switchMap(() => this.deviceService.getMeasurmentLiveUpdateCardDataV2(httpOptions,deviceId,seriesType,aggregation,from,to,pageSize,revert)),
switchMap(() => this.deviceService.GetMeasurmentsV2(httpOptions,deviceId,seriesType,aggregation,from,to,pageSize,revert)),
)
.subscribe((liveUpdateChartData: any[]) => {
debugger;
this.liveUpdateChartData = [...liveUpdateChartData];
//console.log("測量數據"); // console.log(this.liveUpdateChartData); }); }
Http 可觀察對象
GetMeasurmentsV2(httpOptions: any, deviceID: number, seriesType: string, aggregationType: string, dateFrom: string, dateTo: string, pageSize: number, revert: boolean): Observable<any[]> {
let url = `${this.config.apiUrl}/measurement/measurements/series?aggregationType='${aggregationType}'&dateFrom='${dateFrom}'&dateTo='${dateTo}'&pageSize='${pageSize}'&revert='${revert}'&series='${seriesType}'&source='${deviceID}'`
url = url.replace(/'/g,'');
return this.httpClient.get<any>(
url
,httpOptions)
.pipe(map(measurments => {
return observableOf(measurments);
}));
}
現在問題來了
請幫助我如何解決這個問題?
你現在正在返回一個嵌套的 observable
只需返回初始 observable return this.httpClient.get<any>(url, httpOptions)
,而無需將響應包裝在另一個 observable 中
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