py-pydantic-patterns

What problem does it solve?

This Skill provides practical migration and pattern guidance for migrating from Pydantic v1 to v2, enabling robust validation, serialization, and API modeling in Python projects.

Core Features & Use Cases

• Migration patterns: from v1 to v2 using field_validator, model_validator, and ConfigDict configurations.
• Validation patterns: field validators, model validators, discriminated unions, and custom types for clean data models.
• Serialization control: customize how models serialize to dicts or JSON with field_serializer and computed fields.
• API modeling: build clear input/output schemas and reuse base models via schema inheritance for FastAPI/SQLModel.

Quick Start

Define a simple Pydantic v2 model with model_config, then validate input data using model_validate to demonstrate field and model validators.