pydantic 2.11.0a1 on Python PyPI

v2.11.0a1 (2025-01-30)

What's Changed

Note

Pydantic v2.11 is a version strongly focused on build time performance of Pydantic models (and core schema generation in general).
This is an early alpha release, meant to collect early feedback from users having issues with core schema builds.

Packaging

Bump dawidd6/action-download-artifact from 6 to 7 by @dependabot in #11018
Re-enable memray related tests on Python 3.12+ by @Viicos in #11191
Bump astral-sh/setup-uv to 5 by @dependabot in #11205
Bump ruff to v0.9.0 by @sydney-runkle in #11254
Regular uv.lock deps update by @sydney-runkle in #11333
Add a check_pydantic_core_version() function by @Viicos in #11324
Remove greenlet development dependency by @Viicos in #11351
Bump pydantic-core to v2.28.0 by @Viicos in #11364

New Features

Support unsubstituted type variables with both a default and a bound or constraints by @FyZzyss in #10789
Add a default_factory_takes_validated_data property to FieldInfo by @Viicos in #11034
Raise a better error when a generic alias is used inside type[] by @Viicos in #11088
Properly support PEP 695 generics syntax by @Viicos in #11189
Properly support type variable defaults by @Viicos in #11332

Changes

Rework create_model field definitions format by @Viicos in #11032
Raise a deprecation warning when a field is annotated as final with a default value by @Viicos in #11168
Deprecate accessing model_fields and model_computed_fields on instances by @Viicos in #11169
Move core schema generation logic for path types inside the GenerateSchema class by @sydney-runkle in #10846
Move deque schema gen to GenerateSchema class by @sydney-runkle in #11239
Move Mapping schema gen to GenerateSchema to complete removal of prepare_annotations_for_known_type workaround by @sydney-runkle in #11247
Remove Python 3.8 Support by @sydney-runkle in #11258
Disable pydantic-core core schema validation by @sydney-runkle in #11271

Performance

Only evaluate FieldInfo annotations if required during schema building by @Viicos in #10769
Optimize calls to get_type_ref by @Viicos in #10863
Improve __setattr__ performance of Pydantic models by caching setter functions by @MarkusSintonen in #10868
Improve annotation application performance by @Viicos in #11186
Improve performance of _typing_extra module by @Viicos in #11255
Refactor and optimize schema cleaning logic by @Viicos and @MarkusSintonen in #11244

Fixes

Add validation tests for _internal/_validators.py by @tkasuz in #10763
Improve TypeAdapter instance repr by @sydney-runkle in #10872
Revert "ci: use locally built pydantic-core with debug symbols by @sydney-runkle in #10942
Re-enable all FastAPI tests by @tamird in #10948
Fix typo in HISTORY.md. by @felixxm in #11077
Infer final fields with a default value as class variables in the mypy plugin by @Viicos in #11121
Recursively unpack Literal values if using PEP 695 type aliases by @Viicos in #11114
Override __subclasscheck__ on ModelMetaclass to avoid memory leak and performance issues by @Viicos in #11116
Remove unused _extract_get_pydantic_json_schema() parameter by @Viicos in #11155
Add FastAPI and SQLModel to third-party tests by @sydney-runkle in #11044
Fix conditional expressions syntax for third-party tests by @Viicos in #11162
Move FastAPI tests to third-party workflow by @Viicos in #11164
Improve discriminated union error message for invalid union variants by @Viicos in #11161
Unpack PEP 695 type aliases if using the Annotated form by @Viicos in #11109
Include openapi-python-client check in issue creation for third-party failures, use main branch by @sydney-runkle in #11182
Add pandera third-party tests by @Viicos in #11193
Add ODMantic third-party tests by @sydney-runkle in #11197
Add missing stacklevel in deprecated_instance_property warning by @Viicos in #11200
Copy WithJsonSchema schema to avoid sharing mutated data by @thejcannon in #11014
Do not cache parametrized models when in the process of parametrizing another model by @Viicos in #10704
Re-enable Beanie third-party tests by @Viicos in #11214
Add discriminated union related metadata entries to the CoreMetadata definition by @Viicos in #11216
Consolidate schema definitions logic in the _Definitions class by @Viicos in #11208
Support initializing root model fields with values of the root type in the mypy plugin by @Viicos in #11212
Fix various issues with dataclasses and use_attribute_docstrings by @Viicos in #11246
Only compute normalized decimal places if necessary in decimal_places_validator by @misrasaurabh1 in #11281
Fix two misplaced sentences in validation errors documentation by @ananiavito in #11302
Fix mkdocstrings inventory example in documentation by @pawamoy in #11311
Add support for validation_alias in the mypy plugin by @Viicos in #11295
Do not transform model serializer functions as class methods in the mypy plugin by @Viicos in #11298
Simplify GenerateJsonSchema.literal_schema() implementation by @misrasaurabh1 in #11321
Add additional allowed schemes for ClickHouseDsn by @Maze21127 in #11319
Coerce decimal constraints to Decimal instances by @Viicos in #11350
Fix ValueError on year zero by @davidhewitt in pydantic-core#1583

New Contributors

@FyZzyss made their first contribution in #10789
@tamird made their first contribution in #10948
@felixxm made their first contribution in #11077
@alexprabhat99 made their first contribution in #11082
@Kharianne made their first contribution in #11111
@mdaffad made their first contribution in #11177
@thejcannon made their first contribution in #11014
@thomasfrimannkoren made their first contribution in #11251
@usernameMAI made their first contribution in #11275
@ananiavito made their first contribution in #11302
@pawamoy made their first contribution in #11311
@Maze21127 made their first contribution in #11319

pydantic 2.11.0a1 v2.11.0a1 2025-01-30 on Python PyPI