Sourced from pydantic's releases.

v2.12.3 2025-10-17

v2.12.3 (2025-10-17)

What's Changed

This is the third 2.13 patch release, fixing issues related to the FieldInfo class, and reverting a change to the supported after model validator function signatures.

• Raise a warning when an invalid after model validator function signature is raised by @​Viicos in #12414. Starting in 2.12.0, using class methods for after model validators raised an error, but the error wasn't raised concistently. We decided to emit a deprecation warning instead.
• Add FieldInfo.asdict() method, improve documentation around FieldInfo by @​Viicos in #12411. This also adds back support for mutations on FieldInfo classes, that are reused as Annotated metadata. However, note that this is still not a supported pattern. Instead, please refer to the added example in the documentation.

The blog post section on changes was also updated to document the changes related to serialize_as_any.

Full Changelog: https://github.com/pydantic/pydantic/compare/v2.12.2...v2.12.3

v2.12.2 2025-10-14

v2.12.2 (2025-10-14)

What's Changed

Fixes

• Release a new pydantic-core version, as a corrupted CPython 3.10 manylinux2014_aarch64 wheel got uploaded (pydantic-core#1843).
• Fix issue with recursive generic models with a parent model class by @​Viicos in #12398

Full Changelog: https://github.com/pydantic/pydantic/compare/v2.12.1...v2.12.2

v2.12.1 2025-10-13

v2.12.1 (2025-10-13)

GitHub release

What's Changed

This is the first 2.12 patch release, addressing most (but not all yet) regressions from the initial 2.12.0 release.

Fixes

• Do not evaluate annotations when inspecting validators and serializers by @​Viicos in #12355
• Make sure None is converted as NoneType in Python 3.14 by @​Viicos in #12370
• Backport V1 runtime warning when using Python 3.14 by @​Viicos in #12367
• Fix error message for invalid validator signatures by @​Viicos in #12366
• Populate field name in ValidationInfo for validation of default value by @​Viicos in pydantic-core#1826
• Encode credentials in MultiHostUrl builder by @​willswire in pydantic-core#1829
• Respect field serializers when using serialize_as_any serialization flag by @​davidhewitt in pydantic-core#1829
• Fix various RootModel serialization issues by @​davidhewitt in pydantic-core#1836

New Contributors

... (truncated)

Sourced from pydantic's changelog.

v2.12.3 (2025-10-17)

GitHub release

What's Changed

This is the third 2.13 patch release, fixing issues related to the FieldInfo class, and reverting a change to the supported after model validator function signatures.

• Raise a warning when an invalid after model validator function signature is raised by @​Viicos in #12414. Starting in 2.12.0, using class methods for after model validators raised an error, but the error wasn't raised concistently. We decided to emit a deprecation warning instead.
• Add FieldInfo.asdict() method, improve documentation around FieldInfo by @​Viicos in #12411. This also add back support for mutations on FieldInfo classes, that are reused as Annotated metadata. However, note that this is still not a supported pattern. Instead, please refer to the added example in the documentation.

The blog post section on changes was also updated to document the changes related to serialize_as_any.

v2.12.2 (2025-10-14)

GitHub release

What's Changed

Fixes

• Release a new pydantic-core version, as a corrupted CPython 3.10 manylinux2014_aarch64 wheel got uploaded (pydantic-core#1843).
• Fix issue with recursive generic models with a parent model class by @​Viicos in #12398

v2.12.1 (2025-10-13)

GitHub release

What's Changed

This is the first 2.12 patch release, addressing most (but not all yet) regressions from the initial 2.12.0 release.

Fixes

• Do not evaluate annotations when inspecting validators and serializers by @​Viicos in #12355
• Make sure None is converted as NoneType in Python 3.14 by @​Viicos in #12370
• Backport V1 runtime warning when using Python 3.14 by @​Viicos in #12367
• Fix error message for invalid validator signatures by @​Viicos in #12366
• Populate field name in ValidationInfo for validation of default value by @​Viicos in pydantic-core#1826
• Encode credentials in MultiHostUrl builder by @​willswire in pydantic-core#1829
• Respect field serializers when using serialize_as_any serialization flag by @​davidhewitt in pydantic-core#1829
• Fix various RootModel serialization issues by @​davidhewitt in pydantic-core#1836

New Contributors

... (truncated)

• 1a8850d Prepare release 2.12.3
• 09dbcf2 Add FieldInfo.asdict() method, improve documentation around FieldInfo
• 5da4331 Improve documentation about serialize as any behavior
• 9c86324 Raise a warning when an invalid after model validator function signature is r...
• 36a73c6 Update pydantic-extra-types dependency to version >=2.10.6
• 1e616a3 Prepare release v2.12.2
• dc302e2 Fix issue with recursive generic models with a parent model class
• 6876485 Bump pydantic-core to v2.41.4
• b4076c6 Prepare release 2.12.1
• b67f072 Bump pydantic-core to v2.41.3
• Additional commits viewable in compare view

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