Will you please elaborate more on the error and if possible create a dummy code or scenario like this on https://stackblitz.com/ so that can help you.. in the above scenario will you please check the response you are getting in getSession service
Regards Rahul Mishra On Sun, 25 Oct, 2020, 1:25 AM [email protected], < [email protected]> wrote: > Hi Arnaud, > Thanks for your reply but this appears to be very complex for me . I am > unable to chain my request. > > my first call - > getsession() in below format > { > "error": null, > "sessionID": "XXXXXXXX" > } > I need to pick the session ID and then call othe function > getInformation ( sessionID from above response). > > I tried to do the following thing but does not work as I get compile time > error > > this.service.getSession().pipe( > switchMap(data =>{ > let session = data.sessionID; > this.serice.getinformation(session ); > }) > ) > I really need correct syntax for it. I struggled with all video from > YouTube but no understanding. > Regards > Sandeep Shukla > > On Wednesday, October 21, 2020 at 2:17:53 PM UTC+2 Arnaud Deman wrote: > >> Hi Sandeep, >> >> The calls to the backend are actually returning Observables. This is >> asynchronous, so the second call is probably done before the first >> Observable has emitted a value. You can combine the two observables like I >> said in my previous answer. Another solution could be to perform the second >> call in the subscribe of the first one. If this diagnostic is not correct >> perhaps could you provide an minimalist stackblitz or equivalent. >> >> Regards, >> Arnaud. >> >> On Tuesday, 20 October 2020 at 19:28:15 UTC+2 [email protected] wrote: >> >>> Hi Arnaud, >>> Thanks for your response. >>> I did not understand it completely. The moment I call method in >>> subsequent request session becomes undefined. Here is the code I am >>> attaching. >>> >>> sessionId : string = ""; >>> >>> this.loginService.getSession(t) >>> .subscribe(data => { >>> this.result=JSON.parse(JSON.stringify(data)); >>> sessionId = this.result; >>> }, error => { >>> this.result = JSON.stringify(error).toString(); >>> }); >>> // I only want to return result from below method to consumer while >>> session is created in each request. I cannot store sessionId from >>> //getSession. I am not sure how to combine them >>> this.loginService.searchDocument(this.sessionId , bodymsg) >>> .subscribe(data => { >>> this.result=JSON.parse(JSON.stringify(data)); >>> }, error => { >>> this.result = JSON.stringify(error).toString(); >>> }); >>> >>> >>> >>> Regards >>> Sandeep Sjhukla >>> >>> On Tue, Oct 20, 2020 at 11:40 AM Arnaud Deman <[email protected]> wrote: >>> >>>> Hello Sandeep, >>>> Assuming the backend calls return Observables, you could do something >>>> like this (untested): >>>> getSession (). pipe ( >>>> mergeMap (sessions => getInformation (session)) >>>> ); >>>> >>>> This would return an Observable of the same type as getInformation >>>> (session). >>>> >>>> Regards, >>>> Arnaud. >>>> >>>> >>>> On Monday, 19 October 2020 at 11:35:49 UTC+2 [email protected] >>>> wrote: >>>> >>>>> Hi, >>>>> >>>>> I would like to call an service in which I need a session value. I >>>>> dont want customer to enter the login details to create the session rather >>>>> on page load itself I would like to provide the details. >>>>> >>>>> 1) var session = getSession(); // rest call from backend >>>>> >>>>> 2) var info = getInformation (session) ; //rest call from backend >>>>> >>>>> 3) return infor to cleint >>>>> >>>>> I would like to know how I can do it with one call. It does not work >>>>> for me. >>>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Angular and AngularJS discussion" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/angular/d2ffc870-f1cd-4f18-96ca-357bccb163ccn%40googlegroups.com >>>> <https://groups.google.com/d/msgid/angular/d2ffc870-f1cd-4f18-96ca-357bccb163ccn%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> >>> >>> -- >>> Regards >>> Sandeep Shukla, >>> Mobile# +31647969951 <+31%206%2047969951> >>> >> -- > You received this message because you are subscribed to the Google Groups > "Angular and AngularJS discussion" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/angular/1dd27fe0-8a7e-41b1-9cc5-5a79a09a492fn%40googlegroups.com > <https://groups.google.com/d/msgid/angular/1dd27fe0-8a7e-41b1-9cc5-5a79a09a492fn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Angular and AngularJS discussion" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/angular/CACa0fzwAj-xYrjv3nqukQbfhXr_4%2B%3D3nmKJysPveMS9Q9YWghA%40mail.gmail.com.
