v2.12

Issues

• Add exclude_if (func) parameter to model_dump method

  feature request
  pydantic/pydantic#10728 · Filter by author d3cryptofc opened on Oct 27, 2024 · v2.12
  21

• Create a model dynamically with create_model() specifying a subset of fields in V2

  feature request
  pydantic/pydantic#9573 · Filter by author tteguayco opened on Jun 5, 2024 · v2.12
  15

• Extend discriminator to support a default/fallback model

  deferredfeature requesttopic-discriminated unions
  pydantic/pydantic#11188 · Filter by author Creat55 opened on Dec 29, 2024 · v2.12
  2

• Better loc handling

  deferredfeature request
  pydantic/pydantic#10966 · Filter by author JensHeinrich opened on Nov 25, 2024 · v2.12
  3

• Support for validate_call with generics

  deferredfeature requesttopic-generics
  pydantic/pydantic#7796 · Filter by author caniko opened on Oct 11, 2023 · v2.12
  7

• Slow model import times with v2, consider optimizing with schema caching + copy reduction

  bug V2topic-performance
  pydantic/pydantic#7263 · Filter by author ErnestoLoma opened on Aug 28, 2023 · v2.12
  14

  

• Can't use config keyword argument with TypeAdapter.__init__ on stdlib dataclass

  bug V2
  pydantic/pydantic#8326 · Filter by author bmaranville opened on Dec 7, 2023 · v2.12
  4

  

• KeyError when inhering from a self-referencing generic model

  bug V2topic-generics
  pydantic/pydantic#9969 · Filter by author rizar opened on Jul 25, 2024 · v2.12
  4

  

• validate_assignment=True && use of @model_validator(mode="after") leads to RecursionError

  bug V2
  pydantic/pydantic#6597 · Filter by author GugelRobin opened on Jul 11, 2023 · v2.12
  5

• Generic TypedDicts do not resolve type parameters correctly

  bug V2topic-generics
  pydantic/pydantic#7988 · Filter by author NCPlayz opened on Nov 1, 2023 · v2.12
  5

• Revalidate instances shouldn't consider cached properties

  bug V2topic-cached property
  pydantic/pydantic#11638 · Filter by author strangemonad opened on Mar 27, 2025 · v2.12
  4

  

• Better support for polymorphic members deriving from a common base class -- enabling extensibility

  feature requesttopic-discriminated unions
  pydantic/pydantic#11595 · Filter by author joschu opened on Mar 20, 2025 · v2.12
  26

• Raise a warning when accessing incomplete model fields

  change
  pydantic/pydantic#11453 · Filter by author Viicos opened on Feb 17, 2025 · v2.12
  11

• JSON Schema for optional fields is incorrect.

  documentationfeature requesttopic-unset
  pydantic/pydantic#7161 · Filter by author grabov opened on Aug 17, 2023 · v2.12
  29

  

• Validators execution order

  documentationfeature requestv3
  pydantic/pydantic#8277 · Filter by author vitalik opened on Dec 1, 2023 · v2.12
  20

  

• Make sure core schema types are unique

  feature requestrefactor
  pydantic/pydantic#11087 · Filter by author Viicos opened on Dec 11, 2024 · v2.12
  

• The keyword argument exclude does not take effect when custom class uses model_serializer

  bug V2topic-validators-serializers
  pydantic/pydantic#6575 · Filter by author BreezeWhite opened on Jul 11, 2023 · v2.12
  6

  

• Mypy plugins complains if a field is named "kwargs"

  bug V2topic-mypy plugin
  pydantic/pydantic#3125 · Filter by author Kyuuhachi opened on Aug 22, 2021 · v2.12
  8

  

• Add isinstance method to TypeAdapter

  feature request
  pydantic/pydantic#10820 · Filter by author samuelcolvin opened on Nov 12, 2024 · v2.12
  2

• DecoratorInfos.build() is unnecessarily slow

  feature requesttopic-performance
  pydantic/pydantic#11975 · Filter by author elprans opened on Jun 12, 2025 · v2.12
  2

  

• A new marker API

  feature requestfeedback wantedtopic-serializationtopic-validation
  pydantic/pydantic#12056 · Filter by author Viicos opened on Jul 11, 2025 · v2.12
  8

• Don't raise error on BaseModel kwargs

  feature request
  pydantic/pydantic#6024 · Filter by author Kludex opened on Jun 6, 2023 · v2.12
  1

• non-default argument '<field name>' follows default argument false positive when using Field without a default value before field that does not use Field

  bug V2v3
  pydantic/pydantic#10047 · Filter by author DetachHead opened on Aug 5, 2024 · v2.12
  4