What I'm trying to do is create a domain model with a Plain Old PHP Object. The I'm creating a library which will do all the infrastructure stuff. So one of my models looks like this class Project...

I'm looking for a simple example to illustrate the benefits of using a rich domain model. Ideally, I'd like a before and after code listing (which should be as short as possible). The before...

A while ago I had a discussion with my colleagues about the persistence of Domain Models and whether we should enforce foreign-key constraints at the database level. My first reaction was that the...

I was trying to separate my DAL from my Business Layer, and in doing so, I decided to eschew any ActiveRecord approach and go for a DataMapper approach. In other words, my domain objects would not...