Angular 6 : How to identify forkJoin response

Question

Angular 6:如何使用 forkJoin 识别 api 的响应

reqs = [];
if (shouldUpdatePhone) {
   reqs.push(this.customerService.updatePhone(phoneUpdateRequest))
}
if (shouldUpdateAddress) {
   reqs.push(this.customerService.updateAddress(addressUpdateRequest))
}

forkJoin(reqs).subscribe(result => {
   console.log('result :', result);
  //How to know response is from updatePhone and response from updateAddress?
});

如何识别收到的响应属于 updatePhone 和 updateAddress？基于标识，我需要向用户显示消息。

这两个 api 返回数组(2) >

{model:true, code:200, message:null},

{model:true, code:200, message:null}

Answer 1

您可以在每次请求后使用 map 管道将您的响应包装在另一个标识其类型的对象中。就像这样:

reqs = [];
if (shouldUpdatePhone) {
    reqs.push(this.customerService.updatePhone(phoneUpdateRequest)
        .pipe(map(value => ({type: 'phone', value: value})))
        .pipe(catchError(value => of({type: 'phone', failed: true}))))
}
if (shouldUpdateAddress) {
    reqs.push(this.customerService.updateAddress(addressUpdateRequest)
        .pipe(map(value => ({type: 'address', value: value})))
        .pipe(catchError(value => of({type: 'address', failed: true}))))
}

forkJoin(reqs).subscribe(results => {
    console.log('result :', results);

    for(let result of results){
        if(result.type == 'phone'){
            if(result.failed)
                console.log("Phone failed");
            else
                console.log("Phone: " + result.value);
        }

        else if(result.type == 'address'){
            if(result.failed)
                console.log("Address failed");
            else
                console.log("Address: " + result.value);
        }
    }
});