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Pydantic · Type Alias

PlainValidator

PlainValidator lets a function fully control validation for a field. Pydantic does not apply the field type's normal validation after the function returns.

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Syntax

PlainValidator(func, json_schema_input_type=Any)

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  • BeforeValidator
  • AfterValidator
  • WrapValidator
  • field_validator

Source: Functional Validators | Pydantic Docs. Checked 2026-11-03.