I have used "SelectList" cusotm field type in transition screen.
It contains "None" as first option in select list field.
I have marked "Required" in field configuration. Though, it allows to select "None" while submit the transition. i want it to be mandatory validation to select other then "None" in transition screen.
Thank You
OP didn't seem to be asking how to remove NONE.
He's asking "How can I make choosing a value other than NONE mandatory?"
Alternatively, you can remove the 'None' from the Select list options by referring to the following links:
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You have to define a default value for the customfield in the field configuration.
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Strange, if the field is marked as required, none should not be a valid option...
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