Chapter 4: Data models for APIs, DTOs, and system boundaries

In this chapter

• 4.1　What is a system boundary?
• 4.2　Request DTOs: incoming data
• 4.3　Record DTOs in ASP.NET Core
• 4.4　System.Text.Json and records
  • Deserializing positional records
  • Constructor-based deserialization
  • JSON names and record properties
• 4.5　Response DTOs: outgoing data
  • Mapping domain models to response DTOs
• 4.6　Where validation belongs
  • Data annotations
  • Independent validators
  • A separate type for validated input
  • Choosing an approach
• 4.7　Separating DTOs and domain models
• 4.8　Commands and event payloads
  • Command objects
  • Event payloads
• 4.9　Configuration objects
• 4.10　Chapter review

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