class Upgrow::Model
Models are objects that represent core entities of the app's business logic. These are usually persisted and can be fetched and created as needed. They have unique keys for identification (usually a numeric value), and, most importantly perhaps, they are immutable. This is the key difference between this new Model
layer of objects and the Active Record
instances regularly referred to as models in typical Rails default apps.
Another difference between Models and Records is that, once instantiated, Models simply hold its attributes immutably, and they don't have any capabilities to create or update any information in the persistence layer.
The collaboration between Repositories and Models is what allows Active Record
to be completely hidden away from any other areas of the app. There are no references to Records in controllers, views, and anywhere else. Repositories are invoked instead, which in turn return read-only Models.
Private Class Methods
# File lib/upgrow/model.rb, line 27 def inherited(subclass) super subclass.schema = ActiveRecordSchema.new( Naming.model_to_record(subclass.name), subclass.schema ) end