Wt

No you cannot (currently ?).

But since this only affects schema generation, you can create the schema yourself rather than relying on Wt::Dbo for that? The problem is that index and constraint capabilities vary from database to database and I think we will never have enough API to support all these options, so we prefer to consider this outside the scope of Wt::Dbo... Arguing that a simple 'unique' constraint or simple default index should be included in Wt::Dbo does make sense though, so let's see if more people demand this.

Regards,
koen