I am having 4 API let be A,B,C,D and I want to get combine data of all 4 API into single obserable.
I want using forkJoin([A,B]) and using the response of forkJoin into forkJoin([C,D]).
Example:
return forJoin([a,b]).pipe(map result=>{
return forkJoin([c(a.result),d(a.result,b.result)]);
})
Problem for is that I am only getting C and D API response. Anyone can help me out.
First of all there should be a switchMap for returning the inner forkJoin. And if you want to return also the a and b response, you can just use of the original result:
return forkJoin([a,b]).pipe(
switchMap(result => {
return forkJoin([c(result[0]),d(result[0], result[1]), of(result)]
})
})
Now you get an array of all 3 results, last beeing the array of the first response