Keep Pydantic Out of Your Domain Layer

This article discusses how to avoid letting Pydantic models creep into your domain layer when building larger applications, maintaining clean, testable code. The author argues that while Pydantic is convenient, using it in the domain layer creates tight coupling. The article introduces using the Dacite library to convert Pydantic BaseModels to plain Python dataclasses and demonstrates, via an example, how to cleanly separate concerns between application, domain, and infrastructure layers, resulting in a more maintainable and testable architecture.