Showing content from https://github.com/pydantic/pydantic/releases/tag/v2.12.0a1 below:
Release v2.12.0a1 2025-07-26 · pydantic/pydantic · GitHub
v2.12.0a1 (2025-07-26)
This is the first alpha release of the upcoming 2.12 release, which adds initial support for Python 3.14.
What's Changed New Features
- Add
__pydantic_on_complete__() hook that is called once model is fully ready to be used by @DouweM in #11762
- Add initial support for Python 3.14 by @Viicos in #11991
- Add regex patterns to JSON schema for
Decimal type by @Dima-Bulavenko in #11987
- Add support for
doc attribute on dataclass fields by @Viicos in #12077
- Add experimental
MISSING sentinel by @Viicos in #11883
Changes
- Allow config and bases to be specified together in
create_model() by @Viicos in #11714
- Move some field logic out of the
GenerateSchema class by @Viicos in #11733
- Always make use of
inspect.getsourcelines() for docstring extraction on Python 3.13 and greater by @Viicos in #11829
- Only support the latest Mypy version by @Viicos in #11832
- Do not implicitly convert after model validators to class methods by @Viicos in #11957
- Refactor
FieldInfo creation implementation by @Viicos in #11898
- Make
Secret covariant by @bluenote10 in #12008
- Emit warning when field-specific metadata is used in invalid contexts by @Viicos in #12028
Fixes
- Properly fetch plain serializer function when serializing default value in JSON Schema by @Viicos in #11721
- Remove generics cache workaround by @Viicos in #11755
- Remove coercion of decimal constraints by @Viicos in #11772
- Fix crash when expanding root type in the mypy plugin by @Viicos in #11735
- Only mark model as complete once all fields are complete by @DouweM in #11759
- Do not provide
field_name in validator core schemas by @DouweM in #11761
- Fix issue with recursive generic models by @Viicos in #11775
- Fix qualified name comparison of private attributes during namespace inspection by @karta9821 in #11803
- Make sure Pydantic dataclasses with slots and
validate_assignment can be unpickled by @Viicos in #11769
- Traverse
function-before schemas during schema gathering by @Viicos in #11801
- Fix check for stdlib dataclasses by @Viicos in #11822
- Check if
FieldInfo is complete after applying type variable map by @Viicos in #11855
- Do not delete mock validator/serializer in
model_rebuild() by @Viicos in #11890
- Rebuild dataclass fields before schema generation by @Viicos in #11949
- Always store the original field assignment on
FieldInfo by @Viicos in #11946
- Do not use deprecated methods as default field values by @Viicos in #11914
- Allow callable discriminator to be applied on PEP 695 type aliases by @Viicos in #11941
- Suppress core schema generation warning when using
SkipValidation by @ygsh0816 in #12002
- Do not emit typechecking error for invalid
Field() default with validate_default set to True by @Viicos in #11988
- Refactor logic to support Pydantic's
Field() function in dataclasses by @Viicos in #12051
Packaging
New Contributors
RetroSearch is an open source project built by @garambo
| Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4