Nested API Calls

[nimdy]

I have been reading about nested API calls, but I can't apply it to my situation. I have two API URLs, one a parent record which gives me a list of all parent records when queried. The other is for the child records which has a mandatory parameter of ParentID. 

I want to be able to first call the parent URL to find a list of all parent IDs, then dynamically call the second URL to return the records for all the children. 

So 

http://example.com/api/parentrecords

Parent ID	Title
1	Something
2	Something Else
3	Blah
4	Blah Blah

Then from this list dynamicall call the child records URL based on the parent IDs

http://example.com/api/childrecords?ParentID=1

http://example.com/api/childrecords?ParentID=2

http://example.com/api/childrecords?ParentID=3

http://example.com/api/childrecords?ParentID=4

to retrieve all the child records for those parent records, which should give me something like 

ID	Parent ID	Details
10	4	Blah
11	1	Something
12	2	Another Blah
13	1	Some Words Go Here
14	3	Lorem Ipsum
15	3	Mickey Mouse

Is this possible?

[parry2k]

@nimdy you should write an M function and pass parent id as value to this function and construct API URL in this function from the parent id parameter and call the API.

In your parent table, create add a custom column and call the above function by passing parent id as parameter. That will do it.

Hope this post helps.

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[nimdy · Accepted solution]

Perfect, thank you 😊

I wasn't understanding the workings behind function and parameters until I watched this video - https://www.thebiccountant.com/2018/03/22/web-scraping-2-scrape-multiple-pages-power-bi-power-query/ (if this helps anyone else out in the same situations.