INNER CODE UNIT · Python

_validation_error_handler

av1155/houndarr · src/houndarr/app.py:218

    async def _validation_error_handler(
        request: Request, exc: RequestValidationError
    ) -> HTMLResponse | JSONResponse:
        """Return a harmless HTML body (never JSON) for HTMX-initiated
        validation errors.

        Base.html opts 422 into the HTMX swap so server-emitted error
        snippets actually render.  FastAPI's default 422 body is JSON
        (``{"detail": [...]}``), which would render as literal text
        inside whatever slot the form targets.  For HTMX requests we
        ship an empty body with ``HX-Reswap: none`` so the swap is
        suppressed (same visible behaviour as before the config flip)
        and log the validation detail server-side for the operator.

        Non-HTMX clients keep FastAPI's default JSON response so API
        consumers and tests are unaffected.
        """
        if is_hx_request(request):

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