Customer can only be indexed into using square brackets or the index function) (Data Outputs)

Question

What is the right way to index a specific field? 
 im getting index error (Customer can only be indexed into using square brackets or the index function)

dineshd0003 · Accepted Answer

Hi I hope you already got the dataset from that expression rule!skjGetCustomerByAcc(). To refer the particular column value use something like rule!skjGetCustomerByAcc().data.column1, but its always better to go with index index(
index(rule!skjGetCustomerByAcc(),"data",null),
"column1",
null)

Mike Schmitt · Answer

Why are you using ".data" when calling the expression rule in the parent, when the expression rule itself already returns the ".data" element of the query?

Customer can only be indexed into using square brackets or the index function) (Data Outputs)

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