How do we specify default value only for an Update?

ServiceStack.OrmLite
1

I have the following dto:

public class File
{
    [AutoId]
    public Guid Id { get; set; }
    [Required]
    public string Name { get; set; }
    [Default(OrmLiteVariables.SystemUtc)]
    public DateTime Created { get; set; }
    [Default(OrmLiteVariables.SystemUtc)]
    public DateTime? Updated { get; set; }
}

I want Created to be set only on Insert (this is working) and Updated to be only set on Updates (this isn’t working). Using PostgreSQL dialect.

2

The default values are only when fields are excluded during INSERT’s, there are no excluded defaults in UPDATE statements, they fields are just not updated.