koxudaxi/datamodel-code-generator 0.69.0

on GitHub

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

• Update CHANGELOG for 0.68.1 by @dcg-generated-docs[bot] in #3594
• Update release benchmark data by @dcg-generated-docs[bot] in #3595
• Skip unused formatter construction by @koxudaxi in #3599
• Retain model import caches by @koxudaxi in #3600
• Fix pydantic typed extra runtime compatibility by @koxudaxi in #3601
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci[bot] in #3605
• Fix legacy pydantic extra templates by @koxudaxi in #3602
• Handle duplicate discriminator values by @koxudaxi in #3603
• Bump the github-actions group across 1 directory with 7 updates by @dependabot[bot] in #3598
• Allow custom and generated file headers by @koxudaxi in #3607
• Fix payload runtime validation exclusions by @koxudaxi in #3609
• Fix optional discriminator literals by @koxudaxi in #3608
• Fix invalid dotted model names by @koxudaxi in #3610
• Add multi-module stdout guard by @koxudaxi in #3611
• Fix empty ("") property name dropping its alias by @chuenchen309 in #3612

New Contributors

• @chuenchen309 made their first contribution in #3612

Full Changelog: 0.68.1...0.69.0