datamodel-code-generator

Version updated for https://github.com/koxudaxi/datamodel-code-generator to version 0.47.0.

  • This action is used across all versions by 2,487 repositories.

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Action Summary

The datamodel-code-generator GitHub Action automates the generation of Python data models from various schema definitions, such as OpenAPI 3, JSON Schema, GraphQL, and raw data formats like JSON, YAML, and CSV. It supports multiple output types, including Pydantic models, dataclasses, TypedDict, and msgspec, while handling complex schema features like $ref, allOf, and enums. This action simplifies the creation of type-safe, validated code, streamlining development processes by reducing manual coding and ensuring compatibility with IDEs and type checkers.

Release notes

Breaking Changes

Code Generation Changes

  • RootModel defaults use direct instantiation - RootModel fields with default values now generate ClassName(value) instead of ClassName.model_validate(value). This produces cleaner code but changes the generated output (#2714)

  • --strict-nullable now applies to JSON Schema - The --strict-nullable option is no longer OpenAPI-only and has been moved to Field customization options. It now also correctly respects nullable on array items (#2713, #2727)

Custom Template Update Required

  • If you use custom Jinja2 templates that check field.nullable, you may need to update them. The nullable field on JsonSchemaObject now defaults to None instead of False. Templates should check field.nullable is True instead of just if field.nullable (#2715)

    Example change:

    {# Before #}
{%- if field.nullable %}...{% endif %}

{# After #}
{%- if field.nullable is true %}...{% endif %}

Error Handling Changes

  • Formatting failures emit warning instead of error - When code formatting fails (e.g., due to black errors), the generator now emits an unformatted output with a warning instead of raising an exception. This allows code generation to succeed even when formatting tools encounter issues (#2737)

What’s Changed

Full Changelog: https://github.com/koxudaxi/datamodel-code-generator/compare/0.46.0...0.47.0