CRUD patterns

This page defines the default way to build CRUD applications in Mateu.

The Mateu CRUD pattern

A typical CRUD module consists of:

1. ViewModel
2. CRUD Adapter
3. CRUD Orchestrator

1. ViewModel

Defines:

• fields (state)
• validation
• relationships
• actions

public class UserViewModel {

  String name;

  @Email
  String email;

}

2. Adapter

Connects UI to application layer.

• reads → query services
• writes → use cases

3. Orchestrator

Exposes CRUD as a module in the UI.

Mental model

• ViewModel → UI definition
• Adapter → integration
• Orchestrator → exposure

Golden rule

Do not mix:

• domain logic
• UI definition

Keep them separate.