schema_json() fails for optional namedtuple fields with default value #2707
Description
Checks
- I added a descriptive title to this issue
- I have searched (google, github) for similar issues and couldn't find anything
- I have read and followed the docs and still think this is a bug
Bug
When trying to generate a schema for a model with an optional NamedTuple field which have a default value, schema_json() fails when trying to unpack parameters for the tuple:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "pydantic/main.py", line 715, in pydantic.main.BaseModel.schema_json
File "pydantic/main.py", line 704, in pydantic.main.BaseModel.schema
File "pydantic/schema.py", line 167, in pydantic.schema.model_schema
File "pydantic/schema.py", line 548, in pydantic.schema.model_process_schema
File "pydantic/schema.py", line 589, in pydantic.schema.model_type_schema
File "pydantic/schema.py", line 234, in pydantic.schema.field_schema
File "pydantic/schema.py", line 202, in pydantic.schema.get_field_info_schema
File "pydantic/schema.py", line 892, in genexpr
TypeError: <lambda>() missing 1 required positional argument: 'y'
def encode_default(dft: Any) -> Any:
if isinstance(dft, (int, float, str)):
return dft
elif sequence_like(dft):
t = dft.__class__
> return t(encode_default(v) for v in dft)
...Output of python -c "import pydantic.utils; print(pydantic.utils.version_info())":
pydantic version: 1.8.1
pydantic compiled: True
install path: /venv/lib/python3.9/site-packages/pydantic
python version: 3.9.0+ (default, Oct 20 2020, 08:43:38) [GCC 9.3.0]
platform: Linux-5.4.0-72-generic-x86_64-with-glibc2.31
optional deps. installed: ['dotenv', 'typing-extensions']
from typing import List, Optional, NamedTuple
from pydantic import BaseModel
class Coordinates(NamedTuple):
x: float
y: float
class LocationBase(BaseModel):
name: str
coords: Optional[Coordinates] = Coordinates(0, 0)
zoom: Optional[int] = 10
LocationBase.schema_json()