I've using Wt from Git (A few weeks old) and am following the tutorial at 
http://www.webtoolkit.eu/wt/doc/tutorial/dbo/tutorial.html to learn how to use 
Wt::Dbo.  Following that tutorial I've implemented a persist method as 
instructed.

template<class Action> void persist(Action& a)

When I link, I get a number of linker errors that seem to indicate that I'm 
supposed to implement a couple of additional persist methods that take 
different parameters.  Am I missing a base class, or can someone point me to 
documentation on the proper implementation of these methods, or ???

Undefined symbols for architecture x86_64:
  "void Project::persist<Wt::Dbo::DropSchema>(Wt::Dbo::DropSchema&)", 
referenced from:
      void Wt::Dbo::persist<Project, 
void>::apply<Wt::Dbo::DropSchema>(Project&, Wt::Dbo::DropSchema&) in 
HydrovoltsConnectProjects.cpp.o
  "void Project::persist<Wt::Dbo::InitSchema>(Wt::Dbo::InitSchema&)", 
referenced from:
      void Wt::Dbo::persist<Project, 
void>::apply<Wt::Dbo::InitSchema>(Project&, Wt::Dbo::InitSchema&) in 
HydrovoltsConnectProjects.cpp.o

Thanks,
Craig

Craig Miller
http://spatialminds.com




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