Pydantic "Not Recognizing" Field in BaseModel with Default Value of Type #2213
Description
Checks
- [X ] I added a descriptive title to this issue
- [X ] I have searched (google, github) for similar issues and couldn't find anything
- [X ] I have read and followed the docs and still think this is a bug
Bug
Output of python -c "import pydantic.utils; print(pydantic.utils.version_info())":
pydantic version: 1.7.3
pydantic compiled: True
python version: 3.8.2 (default, Mar 13 2020, 10:14:16) [GCC 9.3.0]
platform: Linux-4.19.128-microsoft-standard-x86_64-with-glibc2.29
optional deps. installed: ['typing-extensions']
import pydantic
from typing import Type, Sequence, Union
class T:
pass
class Model(pydantic.BaseModel):
t: Union[Type[T], Sequence[Type[T]]] = T
@pydantic.validator("t", always=True)
def make_tuple(cls, v):
if isinstance(v, Sequence):
return tuple(v)
return v,
# ConfigError: Validators defined with incorrect fields: make_tuple (use check_fields=False if you're inheriting from the model and intended this)Note: If the field is marked optional and the default value is set to None, the code works without issue.
import pydantic
from typing import Type, Sequence, Union, Optional
class T:
pass
class Model(pydantic.BaseModel):
t: Optional[Union[Type[T], Sequence[Type[T]]]] = None
@pydantic.validator("t", always=True)
def make_tuple(cls, v):
if not v:
return T,
elif isinstance(v, Sequence):
return tuple(v)
return v,
Model()
# Model(t=(<class '__main__.T'>,))Perhaps I am missing something obvious in my sleep-deprived stupor?
