mirror of
https://github.com/kennethreitz/pydantic.git
synced 2026-06-05 23:00:18 +00:00
Stephen Brown II
44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
from typing import Generic, TypeVar, Optional, List
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from pydantic import BaseModel, validator, ValidationError
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from pydantic.generics import GenericModel
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DataT = TypeVar('DataT')
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class Error(BaseModel):
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code: int
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message: str
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class DataModel(BaseModel):
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numbers: List[int]
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people: List[str]
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class Response(GenericModel, Generic[DataT]):
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data: Optional[DataT]
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error: Optional[Error]
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@validator('error', always=True)
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def check_consistency(cls, v, values):
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if v is not None and values['data'] is not None:
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raise ValueError('must not provide both data and error')
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if v is None and values.get('data') is None:
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raise ValueError('must provide data or error')
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return v
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data = DataModel(numbers=[1, 2, 3], people=[])
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error = Error(code=404, message='Not found')
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print(Response[int](data=1))
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print(Response[str](data='value'))
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print(Response[str](data='value').dict())
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print(Response[DataModel](data=data).dict())
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print(Response[DataModel](error=error).dict())
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try:
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Response[int](data='value')
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except ValidationError as e:
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print(e)
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