Project

General

Profile

Wt::Dbo and Polymorphism

Added by Aaron Wright over 1 year ago

I've been trying to add some persistence to my web application with Wt::Dbo, but I have run up against a problem I can't readily figure out, and that is how polymorphism fits into the equation.

I make use of polymorphism in my web application so that I can treat many objects the same with a common interface. However, I'd like to be able to persist these objects in a database and query for them later by specific type.

I feel like I need a way to tell Wt::Dbo that a class has a collection of base classes, and then somehow all of those object to be persist with unique data per each based on each's derived type (polymorphic persist function?).

I looked through all of the tests and examples for Wt::Dbo and didn't find anything similar. Am I missing something? Or is this not possible?


Replies (2)

RE: Wt::Dbo and Polymorphism - Added by Korneel Dumon over 1 year ago

Hi,

maybe you can manually call the base class persist method, something like:

template<class Action>
void persist(Action a) {
  Base::persist(a);
  ...
}

RE: Wt::Dbo and Polymorphism - Added by Christian Meyer 5 months ago

I added a Feature request for Polymorphism

I also want to use it, but it is currently not possible.

see: https://redmine.emweb.be/issues/10930

    (1-2/2)