datamodel-code-generator

Version updated for https://github.com/koxudaxi/datamodel-code-generator to version 0.70.0.

  • This action is used across all versions by 3,357 repositories.

Action Type

This is a Composite action.

Go to the GitHub Marketplace to find the latest changes.

Action Summary

This GitHub Action automates the process of generating Python data models from various schema definitions, including OpenAPI 3, AsyncAPI, JSON Schema, Apache Avro, XML Schema, Protocol Buffers/gRPC, GraphQL, and MCP tool schemas. It supports converting raw data (JSON/YAML/CSV) into Python model output types, retargeting existing Pydantic, dataclass, or TypedDict classes, and outputs models in different styles like Pydantic v2, Pydantic v2 dataclass, dataclasses, TypedDict, or msgspec. The action handles complex schemas with $ref, allOf, oneOf, anyOf, enums, and nested types, producing type-safe, validated code that is ready for IDEs and type checkers.

What’s Changed

Breaking Changes

  • Preserved additionalProperties value constraints change generated output - JSON Schema additionalProperties (and propertyNames/mapping) value schemas that carry constraints (e.g. minimum/maximum, minLength/maxLength/pattern, array item constraints, allOf-merged primitives) now retain those constraints in the generated model instead of dropping them. This produces new TypeAlias/RootModel/TypeAliasType definitions and changes dict value type hints, so output differs for existing schemas. For example, a mapping value that previously generated dict[str, Literal['fixed']] now generates a dedicated alias preserving the constraints (#3616):
# Before
class DictModel(RootModel[dict[str, Literal['fixed']]]):
    root: dict[str, Literal['fixed']]

# After
DictModelAdditionalProperty = TypeAliasType(
    "DictModelAdditionalProperty",
    Annotated[Literal['fixed'], Field(max_length=100, min_length=1)],
)


class DictModel(RootModel[dict[str, DictModelAdditionalProperty]]):
    root: dict[str, DictModelAdditionalProperty]

What’s Changed

Full Changelog: https://github.com/koxudaxi/datamodel-code-generator/compare/0.69.0...0.70.0