Migrations not creating constraint annotated on class

ServiceStack.OrmLite SQL Server
1

Hi, the following code does create the new column, but not the constraint/index. I even named it so the rollback would work.

public class Migration1010 : MigrationBase
{
    [UniqueConstraint(nameof(Shortname), nameof(Version), "Unique_ShortName_Version")]
    public class FormDefinition
    {
        public string Shortname { get; set; }
    }
    
    public override void Up()
    {
        Db.Migrate<FormDefinition>();
    }

    public override void Down()
    {
        Db.Revert<FormDefinition>();
    }
}

Anything I’m doing wrong here?

2

Declarative code-first migrations only applies to columns not for modifying table definitions.