#requestvalidationerror

RequestValidationError handler scope conflict when using APIRouter

Goal: Apply a custom validation error response format only to certain APIRouter instances while keeping the default behavior for other routes. Constraint/Uncertainty: FastAPI permits registering an exception handler for RequestValidationError on an APIRouter, but the documentation does not clarify whether a router‑level handler replaces, supplements, or is i

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apirouterfastapirequestvalidationerror