How to Get Lookup column using lookup column using REST API

Question

I have one summery custom list in which I have lookup column of detail list.

So I am retrieve all data from it using expand it. But in detail list I also have one lookup column of personal Detail list.

Now how can I get personal Detail from lookup of summery list.

Any help will highly appreciated.

Answer 1

You can not $expand any lookup column of child list. You can only $expand all lookup column of parent list. Let say, you are querying on A list and A has a lookup column from B list. B has a lookup column from C list. So if you are querying on A list, then you can only $expand all columns of B.

/_api/web/lists/getbytitle('A')

You can not $expand any column from C. The reason is there is no direct relation between A and C.

Workaround

At first get the item Id of B list, then make another REST call to B and $expand the columns of C

/_api/web/lists/getbytitle('B')/items({ItemId})?$select={select column from c}&$expand=C

You can use SharePoint REST Client to test your query.

Update

You can make a batch request as you have many items from B.

Make batch requests with the REST APIs