How to set default value for null/empty columns

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I have a datagrid where there is a column Designation coming from Employee entity. If designation is null, the default value should come as 'NA’. If i try changing the default value from the column properties as shown below, it shows empty form despite data in it.
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1 answers
3

Hi, 

You can achieive this by providing default value in attribute level as shown below

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