On Wednesday, March 8, 2017 at 8:31:43 PM UTC-8, celerity12 wrote:
>
> i don't think we can use map here as http and other functions are not
> available in the map called function it's a scope issue
>
> On Wednesday, March 8, 2017 at 5:47:40 PM UTC-8, celerity12 wrote:
>>
>> To be more specific the error is err = TypeError: Cannot read
>> property 'get' of undefined at
>> MapSubscriber.UserPermissionService.getUserProps
>>
>>
Hi Sander,
>
I get error in the call of *.**map(this.secondstep) **in the
GetResult method*
EXCEPTION: Cannot read property 'get' of undefined
As you see below, call to
>
> * this.getUserGroups() works but when calling *
>
> * .map(this.getUserProps) it fails*
>>>
>>>
>>> * IsEditable() { console.log("IsEditable ..."); return
>> this.getUserGroups() .map(this.getUserProps)
>> .subscribe(data => { /* all data is available here */
>> console.log("Is Editable ... " + JSON.stringify(data))
>> }); } getUserProps(data) { console.log("getUserProps ...");
>> let header = new Headers(); header.append("Content-Type",
>> "application/json; odata=verbose"); header.append("Accept",
>> "application/json; odata=verbose"); return this.http.get(this._url,
>> { headers: header }).map((response: Response) =>
>> response.json()) .map((r) => data.getUserProps = r); }*
>
>
Thank you
> On Monday, March 6, 2017 at 8:41:22 PM UTC-8, Sander Elias wrote:
>>>
>>> Hi Celerity,
>>>
>>> If you want synchronous results, you need to use native JS, as Angular
>>> doesn't provide that.
>>> However, you can easily string multiple async calls together.
>>>
>>> might look like this:
>>> import { Injectable } from '@angular/core';
>>> import { Http, Headers, Response } from '@angular/http';
>>>
>>> @Injectable()
>>> export class ServiceNameService {
>>>
>>> constructor(private http:Http) { }
>>>
>>> getResult() {
>>> return this.firststep()
>>> .map(this.secondstep)
>>> .map(this.thirthstep)
>>> .subscribe(data => {
>>> /* all data is available here */
>>> });
>>> }
>>>
>>> firststep() {
>>> return this.http.get('url')
>>> .map((response: Response) => response.json())
>>> .map(data => ({firstep: data}))
>>> ;
>>> }
>>>
>>> secondstep(data) {
>>> /* use data to prepare call */
>>> return this.http.get('url')
>>> .map((response: Response) => response.json())
>>> .map((r) => data.secondStep = r);
>>> }
>>>
>>> thirthstep(data) {
>>> /* use data to prepare call */
>>> return this.http.get('url')
>>> .map((response: Response) => response.json())
>>> .map((r) => data.thirthStep = r);
>>> }
>>>
>>> }
>>>
>>> Hope this helps you a bit,
>>> Regards
>>> Sander
>>>
>>>
>>>
>>>
>>>
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