One post tagged with "validation"

It might seem excessive to define an entire Pydantic BaseModel for a single attribute when a simple type hint like user_id: str would suffice. However, using a single-attribute Pydantic model (often called a Wrapper Model or a Value Object) offers significant advantages, primarily around reusability, centralized validation, and complex parsing.

This pattern transforms a simple type hint into a powerful, reusable validation layer.