SolvedStack cluster: pydantic:data-consistency

What This Cluster Means

Pydantic cluster (39 fixes): Behavior changes that corrupt, drop, reorder, or reshape data and break downstream assumptions.

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Some properties do not remain private after constructing a serialised model

#8523 · pydantic/pydantic

v2 regression: `__setattr__` hides bugs from type checkers

#8643 · pydantic/pydantic

Pydantic TzInfo(UTC) != datetime.UTC

#8683 · pydantic/pydantic

Regression in ByteSize error after migrating to pydantic 2.6

#8676 · pydantic/pydantic

Recursive model with discriminated union has exponential time and space complexity for validation

#8709 · pydantic/pydantic

Fails to parse large integers from json when they are dict keys

#8835 · pydantic/pydantic

datetime dumping to json flips sign of timezone

#8964 · pydantic/pydantic

Error when parsing a string as an integer

#9165 · pydantic/pydantic

Serializing computed fields returning enums

#9394 · pydantic/pydantic

GenericModel[Any] raises ValidationError for GenericModel[SomeModel]

#9414 · pydantic/pydantic

union_mode='smart' not honored when calling model_dump_json()

#9417 · pydantic/pydantic

Time serialization can silently drop timezone

#9571 · pydantic/pydantic

KeyError when trying to instantiate BaseModels that depend on each other

#9887 · pydantic/pydantic

Order of `Final` annotation changes behaviour of field

#9904 · pydantic/pydantic

PydanticSerializationError on IPv4Network (Standard Library Type)

#9957 · pydantic/pydantic

Potential Issue with model_dump_json in Pydantic: Inconsistent Output Compared to json.dumps

#10221 · pydantic/pydantic

__pydantic_complete__ is not updated when rebuilding dataclass

#10284 · pydantic/pydantic

False positive validation error on nested generic `BaseModel`

#10359 · pydantic/pydantic

from __future__ import annotations no longer works on v2.9.0

#10357 · pydantic/pydantic

Declaring a generic attribute in a Pydantic model that itself has a generic attribute breaks deserialisation of the

#10695 · pydantic/pydantic

Recent `typing_extensions.TypeAliasType` backport causing tests to fail.

#10711 · pydantic/pydantic

v2.10.x: OpenAPI schema generation omits constraints for HttpUrl

#11019 · pydantic/pydantic

Deprecated fields bugs with forward annotations

#11390 · pydantic/pydantic

Cached value of `@cached_property` is copied by `model_copy(update=...)`, when new values in update would cause

#11428 · pydantic/pydantic

Schema generation loses Field annotations when using PEP 695 type alias syntax

#11470 · pydantic/pydantic

Regression in size of pydantic core schemas and corresponding `model_json_schema()` call time

#11587 · pydantic/pydantic

pydantic using abc which can have memory and performance issues

#11605 · pydantic/pydantic

validate_as(...) doesn't chain correctly

#11624 · pydantic/pydantic

Root models are sometimes inferred as unions by mypy when using the mypy plugin

#11675 · pydantic/pydantic

Field default gets mutated globally when setting it in a specific model

#11876 · pydantic/pydantic

Change in GetCoreSchemaHandler behaviour in 2.11

#11923 · pydantic/pydantic

FieldInfo lost after applying model_rebuild with _types_namespace on parameterized generic model with forward reference

#11920 · pydantic/pydantic

2.12.0: Follow up to issue #11748

#12396 · pydantic/pydantic

Deferred imports failure with Python 3.14

#12421 · pydantic/pydantic

Enums with `NamedTuple` values not supported

#12503 · pydantic/pydantic

Excessive memory usage for regex validators

#12540 · pydantic/pydantic

warning raised when calling `model_dump` on model with nested `MISSING` fields

#12628 · pydantic/pydantic

`cloudpickle` issue with models with definitions

#12696 · pydantic/pydantic

generated json schema is non-deterministic when field default is a non empty set

#12754 · pydantic/pydantic

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Pydantic — Data consistency

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