datamodel-code-generator

Version updated for https://github.com/koxudaxi/datamodel-code-generator to version 0.69.0.

  • This action is used across all versions by 3,338 repositories.

Action Type

This is a Composite action.

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Action Summary

The GitHub Action datamodel-code-generator automates the process of generating Python data models from various schema formats, including OpenAPI 3, AsyncAPI, JSON Schema, Avro, XML Schema, Protocol Buffers/gRPC, GraphQL, and raw data. It supports converting existing Python types to Pydantic, dataclass, or TypedDict classes, and generates models in different styles such as Pydantic v2, v2 dataclass, dataclasses, and msgspec. The action handles complex schemas and provides type-safe, validated code suitable for IDEs and type checkers.

What’s Changed

Breaking Changes

  • Discriminated unions with duplicate or unresolvable discriminator values now fall back to a plain union - When a discriminated union contains variants that resolve to the same discriminator value, or variants that are containers, RootModel/type-alias wrappers, None/str members, or otherwise lack a resolvable discriminator literal, the generator no longer emits Field(..., discriminator='...') and instead produces a regular union. Previously such schemas emitted a discriminator= argument. Users regenerating models from these schemas will see the discriminator keyword removed from the affected fields (#3603)
# Before (invalid duplicate-value discriminator was emitted):
class GroupedItem(RootModel[Item | ItemReference]):
    root: Item | ItemReference = Field(..., discriminator='type')

# After (falls back to a plain union when variants are not valid discriminated members):
class MixedItem(RootModel[str | ItemReference | None]):
    root: str | ItemReference | None

What’s Changed

New Contributors

Full Changelog: https://github.com/koxudaxi/datamodel-code-generator/compare/0.68.1...0.69.0