Indexing the values is returned as an array value"[]", but it is a single value

Question

I am trying to return some values in a web API of mine where I call an expression rule that maps the vales that are wanted. The thin is I used index() function to cast the values like this 
 childId: rule!A_QE(index(fv!item, "id", null()))['recordType!{record}Record.fields.{record}.childId'], 
 where the item is going through an iterative loop to fetch each list. 
 
 in the web API it is getting returned as: 
 "childId" : [ 777 ], 
 which i do not want it in this form i need it to be returned in the following form: 
 "childId" : 777 , 
 I tried to add at the end of the index, [1] and it is still returning the same form..

Mathurambika M · Accepted Answer

Hi, Instead of adding [1] at the end of the index, index the value from the rule result. Refer to the below snippet. childId: index(
 /*calling rule*/rule!AA_QR_getVehicleStatus(
 refStatusId: index(local!status, "id", null())
 )['recordType!{c40f19ec-824f-4377-8d6f-60c072fa9721}AA Vehicle Status.fields.{c84004ba-e283-4b93-90d8-b6faf7561625}sortOrder'],
 1,
 null()
 )

Indexing the values is returned as an array value"[]", but it is a single value

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