Validate date in Pydantic less than today with condate-CodePudding

I'm trying to use pydantic for a fastapi app to restrict the provided date to be less than today. From the pydantic docs I see a nice function condate, which has a lt argument - that's exactly what I need. My code is:

from datetime import date
from pydantic import BaseModel, condate

class RiskData(BaseModel):
    
    dob: condate(lt=date.today())

which provides the following error:

File "pydantic\main.py", line 342, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 2 validation errors for OpenAPI
components -> schemas -> RiskData -> properties -> dob -> exclusiveMaximum
  value is not a valid float (type=type_error.float)
components -> schemas -> RiskData -> $ref
  field required (type=value_error.missing)

I know that I can use pydantic.validator to achive the functionality that I need, but maybe pydantic allows me to save a couple of lines.

CodePudding user response：

It looks like generating OpenApi Schema by FastAPI does not support Type: condate.

You'd better change to this,

from datetime import date
from pydantic import BaseModel, validator

class RiskData(BaseModel):
    
    dob: date

    @validator("dob")
    def validate_dob(cls, v, values, **kwargs):
        if v < date.today():
            raise ValueError("Your Error Message")
        return v