8000 Release v2.11.0b1 2025-03-06 · pydantic/pydantic · GitHub
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v2.11.0b1 2025-03-06

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@sydney-runkle sydney-runkle released this 06 Mar 16:23
· 119 commits to main since this release
v2.11.0b1
bff7477
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GitHub release

What's Changed

Note

Addendum: 2.11 introduced a small behavior change with Final attributes with an underscore:

class Model(BaseModel):
    _var: Final[int] = 1

In 2.10, _var would be considered as a class variable, but as a private attribute in 2.11.
As documented in the blog post, you can make use of ClassVar instead of Final to keep it as a class variable.

Packaging

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
  • Add support for validating v6, v7, v8 UUIDs by @astei in #11436
  • Improve alias configuration APIs by @sydney-runkle in #11468

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
  • Breaking Change: Move core schema generation logic for path types inside the GenerateSchema class by @sydney-runkle in #10846
  • Remove Python 3.8 Support by @sydney-runkle in #11258
  • Optimize calls to get_type_ref by @Viicos in #10863
  • 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
  • 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 in #11244
  • Create a single dictionary when creating a CoreConfig instance by @sydney-runkle in #11384
  • Bump pydantic-core and thus use SchemaValidator and SchemaSerializer caching by @sydney-runkle in #11402
  • Reuse cached core schemas for parametrized generic Pydantic models by @MarkusSintonen in #11434

Fixes

  • Improve TypeAdapter instance repr by @sydney-runkle in #10872
  • Use the correct frame when instantiating a parametrized TypeAdapter by @Viicos in #10893
  • 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
  • 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
  • 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
  • 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
  • Add support for validation_alias in the mypy plugin by @Viicos in #11295
  • Fix JSON Schema reference collection with "examples" keys by @Viicos in #11305
  • 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
  • Use the correct JSON Schema mode when handling function schemas by @Viicos in #11367
  • Improve exception message when encountering recursion errors during type evaluation by @Viicos in #11356
  • Always include additionalProperties: True for arbitrary dictionary schemas by @austinyu in #11392
  • Expose fallback parameter in serialization methods by @Viicos in #11398
  • Fix path serialization behavior by @sydney-runkle in #11416
  • Do not reuse validators and serializers during model rebuild by @Viicos in #11429
  • Collect model fields when rebuilding a model by @Viicos in #11388
  • Allow cached properties to be altered on frozen models by @Viicos in #11432
  • Fix tuple serialization for Sequence types by @sydney-runkle in #11435
  • Fix: do not check for __get_validators__ on classes where __get_pydantic_core_schema__ is also defined by @tlambert03 in #11444
  • Allow callable instances to be used as serializers by @Viicos in #11451
  • Improve error thrown when overriding field with a property by @sydney-runkle in #11459
  • Fix JSON Schema generation with referenceable core schemas holding JSON metadata by @Viicos in #11475
  • Support strict specification on union member types by @sydney-runkle in #11481
  • Implicitly set validate_by_name to True when validate_by_alias is False by @sydney-runkle in #11503
  • Change type of Any when synthesizing BaseSettings.__init__ signature in the mypy plugin by @Viicos in #11497
  • Support type variable defaults referencing other type variables by @Viicos in #11520
  • Fix ValueError on year zero by @davidhewitt in pydantic/pydantic-core#1583
  • dataclass InitVar shouldn't be required on serialization by @sydney-runkle in pydantic/pydantic-core#1602

New Contributors

Full Changelog: v2.10.6...v2.11.0b1

Contributors

petyosi, jaceklaskowski, and 25 other contributors
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