The 4D language supports the concept of classes and thus, the concept of constructor.

On the another hand, the ORDA abstraction layer, through Data Model Classes, provides a great business benefit. It allows you to write business-oriented code and “publish” it just like an API. Datastore, dataclasses, entity selections, and entities are all available as class objects that can contain functions as well as computed attributes, and aliases.

This leads your apps to follow easily the MVC principles with powerful and optimized code.

To work with a complete object-oriented approach, starting from 4D 20 R10, entity classes can now have a constructor(). Need to set up initial values when a new entity is instantiated? It’s now possible!  Keep reading to learn more …