v2.5.0b1 (2023-11-09)

What's Changed

Packaging

• Update pydantic-core from 2.10.1 to 2.14.1, significant changes from these updates are described below, full changelog here

New Features

• Allow plugins to catch non ValidationError errors by @adriangb in #7806
• Support __doc__ argument in create_model() by @chris-spann in #7863
• Expose regex_engine flag - meaning you can use with the Rust or Python regex libraries in constraints by @utkini in #7768
• Save return type generated from type annotation in ComputedFieldInfo by @alexmojaki in #7889
• Adopting ruff formatter by @Luca-Blight in #7930
• Added validation_error_cause to config by @zakstucke in #7626
• Make path of the item to validate available in plugin by @hramezani in #7861
• Add CallableDiscriminator and Tag by @dmontagu in #7983
• Make union case tags affect union error messages by @dmontagu in #8001
• Add examples and json_schema_extra to @computed_field by @alexmojaki in #8013
• Add JsonValue type by @dmontagu in #7998
• Allow str as argument to Discriminator by @dmontagu in #8047
• Add SchemaSerializer.__reduce__ method to enable pickle serialization by @edoakes in pydantic/pydantic-core#1006

Changes

• Significant Change: replace ultra_strict with new smart union implementation, the way unions are validated has changed significantly to improve performance and correctness, we have worked hard to absolutely minimise the number of cases where behaviour has changed, see the PR for details - by @davidhewitt in pydantic/pydantic-core#867
• Add support for instance method reassignment when extra='allow' by @sydney-runkle in #7683
• Support JSON schema generation for Enum types with no cases by @sydney-runkle in #7927
• Warn if a class inherits from Generic before BaseModel by @alexmojaki in #7891

Performance

• New custom JSON parser, jiter by @samuelcolvin in pydantic/pydantic-core#974
• PGO build for MacOS M1 by @samuelcolvin in pydantic/pydantic-core#1063
• Use __getattr__ for all package imports, improve import time by @samuelcolvin in #7947

Fixes

• Fix mypy issue with subclasses of RootModel by @sydney-runkle in #7677
• Properly rebuild the FieldInfo when a forward ref gets evaluated by @dmontagu in #7698
• Fix failure to load SecretStr from JSON (regression in v2.4) by @sydney-runkle in #7729
• Fix defer_build behavior with TypeAdapter by @sydney-runkle in #7736
• Improve compatibility with legacy mypy versions by @dmontagu in #7742
• Fix: update TypeVar handling when default is not set by @pmmmwh in #7719
• Support specification of strict on Enum type fields by @sydney-runkle in #7761
• Wrap weakref.ref instead of subclassing to fix cloudpickle serialization by @edoakes in #7780
• Keep values of private attributes set within model_post_init in subclasses by @alexmojaki in #7775
• Add more specific type for non-callable json_schema_extra by @alexmojaki in #7803
• Raise an error when deleting frozen (model) fields by @alexmojaki in #7800
• Fix schema sorting bug with default values by @sydney-runkle in #7817
• Use generated alias for aliases that are not specified otherwise by @alexmojaki in #7802
• Support strict specification for UUID types by @sydney-runkle in #7865
• JSON schema: fix extra parameter handling by @me-and in #7810
• Fix: support pydantic.Field(kw_only=True) with inherited dataclasses by @PrettyWood in #7827
• Support validate_call decorator for methods in classes with __slots__ by @sydney-runkle in #7883
• Fix pydantic dataclass problem with dataclasses.field default by @hramezani in #7898
• Fix schema generation for generics with union type bounds by @sydney-runkle in #7899
• Fix version for importlib_metadata on python 3.7 by @sydney-runkle in #7904
• Support | operator (Union) in PydanticRecursiveRef by @alexmojaki in #7892
• Fix display_as_type for TypeAliasType in python 3.12 by @dmontagu in #7929
• Add support for NotRequired generics in TypedDict by @sydney-runkle in #7932
• Make generic TypeAliasType specifications produce different schema definitions by @alexdrydew in #7893
• Added fix for signature of inherited dataclass by @howsunjow in #7925
• Make the model name generation more robust in JSON schema by @joakimnordling in #7881
• Fix plurals in validation error messages (in tests) by @Iipin in #7972
• PrivateAttr is passed from Annotated default position by @tabassco in #8004
• Don't decode bytes (which may not be UTF8) when displaying SecretBytes by @alexmojaki in #8012
• Use classmethod instead of classmethod[Any, Any, Any] by @Mr-Pepe in #7979
• Clearer error on invalid Plugin by @samuelcolvin in #8023
• Correct pydantic dataclasses import by @samuelcolvin in #8027
• Fix misbehavior for models referencing redefined type aliases by @dmontagu in #8050
• Fix Optional field with validate_default only performing one field validation by @sydney-runkle in pydantic/pydantic-core#1002
• Fix definition-ref bug with Dict keys by @sydney-runkle in pydantic/pydantic-core#1014
• Fix bug allowing validation of bool types with coerce_numbers_to_str=True by @sydney-runkle in pydantic/pydantic-core#1017
• Don't accept NaN in float and decimal constraints by @davidhewitt in pydantic/pydantic-core#1037
• Add lax_str and lax_int support for enum values not inherited from str/int by @michaelhly in pydantic/pydantic-core#1015
• Support subclasses in lists in Union of List types by @sydney-runkle in pydantic/pydantic-core#1039
• Allow validation against max_digits and decimals to pass if normalized or non-normalized input is valid by @sydney-runkle in pydantic/pydantic-core#1049
• Fix: proper pluralization in ValidationError messages by @Iipin in pydantic/pydantic-core#1050
• Disallow the string '-' as datetime input by @davidhewitt in pydantic/speedate#52 & pydantic/pydantic-core#1060
• Fix: NaN and Inf float serialization by @davidhewitt in pydantic/pydantic-core#1062
• Restore manylinux-compatible PGO builds by @davidhewitt in pydantic/pydantic-core#1068

New Contributors

pydantic

• @schneebuzz made their first contribution in #7699
• @edoakes made their first contribution in #7780
• @alexmojaki made their first contribution in #7775
• @NickG123 made their first contribution in #7751
• @gowthamgts made their first contribution in #7830
• @jamesbraza made their first contribution in #7848
• @laundmo made their first contribution in #7850
• @rahmatnazali made their first contribution in #7870
• @waterfountain1996 made their first contribution in #7878
• @chris-spann made their first contribution in #7863
• @me-and made their first contribution in #7810
• @utkini made their first contribution in #7768
• @bn-l made their first contribution in #7744
• @alexdrydew made their first contribution in #7893
• @Luca-Blight made their first contribution in #7930
• @howsunjow made their first contribution in #7925
• @joakimnordling made their first contribution in #7881
• @icfly2 made their first contribution in #7976
• @Yummy-Yums made their first contribution in #8003
• @Iipin made their first contribution in #7972
• @tabassco made their first contribution in #8004
• @Mr-Pepe made their first contribution in #7979
• @0x00cl made their first contribution in #8010
• @barraponto made their first contribution in #8032

pydantic-core

• @sisp made their first contribution in pydantic/pydantic-core#995
• @michaelhly made their first contribution in pydantic/pydantic-core#1015

Full changelog: Full Changelog: v2.4.2...v2.5.0b1/