Wt

Error message:

In function
    `void Wt::Dbo::id<Wt::Dbo::FromAnyAction, facts::CommentId>(Wt::Dbo::FromAnyAction&,
    facts::CommentId&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)':
/usr/include/Wt/Dbo/Field_impl.h:128: undefined reference to
    `void Wt::Dbo::FromAnyAction::actId<facts::CommentId>(facts::CommentId&,
    std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)'

Possible work around:

namespace Wt {
namespace Dbo {

template<>
void id(FromAnyAction&, facts::CommentId&, const std::string&, int) {
    throw std::logic_error("Can't set CommentId from any");
}

}
}