Sorting functionality

Hi,
I have created a paging grid with some columns.

For Ex: Employee Id , Experience and Department.

Requirement is like sorting based on Employee Id and Experience. So In department the logic is

a!gridTextColumn(
label: "Department",
field: "noSort",
data: index(
local!dataForCurrentPage,
"department",
null
)
),


I faced following error when I click on department column.

Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error: An error occurred while executing a save: Expression evaluation error in rule 'kp_ial_fetchfiltereddata' at function a!queryEntity: The field [noSort] does not exist.

Any suggestions to get this to work?

Thanks in advance

OriginalPostID-260398