how to update multiple columns at same time?

report Cannot index property of type 'List of Text String' into dictionary. But with

a!update(data:fv!item,index:"backupOn",value:now()),

a!update(data:fv!item,index:"backupBy",value:loggedInUser()), either is correct, but i can't write two of them together which make mix non-key word error

given a cdt local!example with the following structure: Id,lastName,firstName

your UI componente like textfield, radiobutton,dropdown, buttonwidget.....



saveinto:{
    a!save(
        target: local!example,
        value a!Update(
            data: local!example,
            index: "firstName",
            value: "Richard"
        )
    ),
    a!save(
        target: local!example,
        value a!Update(
            data: local!example,
            index: "lastName",
            value: "Michaelis"
        )
    )
}

for a!update you need a proper CDT structure. Index is searching in a "readOnly- way" for a specific value. and you can't update readOnly values ;) 

given a cdt local!example with the following structure: Id,lastName,firstName

your UI componente like textfield, radiobutton,dropdown, buttonwidget.....



saveinto:{
    a!save(
        target: local!example,
        value a!Update(
            data: local!example,
            index: "firstName",
            value: "Richard"
        )
    ),
    a!save(
        target: local!example,
        value a!Update(
            data: local!example,
            index: "lastName",
            value: "Michaelis"
        )
    )
}

for a!update you need a proper CDT structure. Index is searching in a "readOnly- way" for a specific value. and you can't update readOnly values ;)