How to join multiple REST Api responses to one single response.

Hi Team,
I have a form with 3 drop downs. I need to fill these dropdowns with data from 3 different lists.
For fetching the data from lists I have to use REST api.
Is it any way for fetching the data together(to join multiple responses) and get one response from server side ?
Thanks in advance for ur time and help :)
Reshma

Hi Reshma,
According to your description, you want to get items from three different lists in one request using REST API.
Within the exposed REST API endpoints, there seems no such API can support to retrieve data from different lists in one request currently.
If it is an on premises environment, a workaround I can provide is that you can create custom WCF web service in the server side to gather data from the three lists,
then call this service in your code to fetch the data you need, in this way, you will need only one request to the server.
If it is an online environment, custom WCF web service won’t be an option, a possible workaround is that you can gather the data needed from the three lists to an
extra list using workflow, then access this extra list using REST API, it will reduce the number of the requests from the client side.
Best regards
Patrick Liang
TechNet Community Support

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