Tries to parse non-pydantic metadata from Annotated as model data (and fails) #7833
Description
Initial Checks
- I confirm that I'm using Pydantic V2
Description
When adding metadata to Annotated that pydantic does not understand, I expect it to ignore it. It seems, in the example, pydantic tries to parse the incoming data based on the Metadata model.
Here is the error:
tests/test_.py:13 (test_)
def test_():
data = {"state": 2}
> assert Model.model_validate(data)
E pydantic_core._pydantic_core.ValidationError: 1 validation error for Model
E state
E Input should be a valid dictionary or instance of Metadata [type=model_type, input_value=2, input_type=int]
E For further information visit https://errors.pydantic.dev/2.4/v/model_type
test_.py:16: ValidationError
PEP 593 states:
"If a library (or tool) encounters a typehint Annotated[T, x] and has no special logic for metadata x, it should ignore it and simply treat the type as T.|
I do not see this happening here.
Example Code
from typing import Annotated
from pydantic import BaseModel
class Metadata(BaseModel):
...
class Model(BaseModel):
state: Annotated[int, Metadata()]
def test_():
data = {"state": 2}
assert Model.model_validate(data)Python, Pydantic & OS Version
pydantic version: 2.4.2
pydantic-core version: 2.10.1
pydantic-core build: profile=release pgo=false
install path: /Users/cleancoder/Library/Caches/pypoetry/virtualenvs/xxx-sT27uenX-py3.9/lib/python3.9/site-packages/pydantic
python version: 3.9.15 (main, Feb 20 2023, 14:56:22) [Clang 14.0.0 (clang-1400.0.29.202)]
platform: macOS-13.4.1-arm64-arm-64bit
related packages: email-validator-2.0.0.post2 pydantic-extra-types-2.1.0 typing_extensions-4.7.1 pydantic-settings-2.0.3 fastapi-0.103.2