Coverage for src/lilbee/server/validation_format.py: 100%

1"""Shared rendering of Litestar body-validation failures for wire envelopes.""" 

2 

3from __future__ import annotations 

4 

5from litestar.exceptions import ValidationException 

6 

7 

8def format_validation(exc: ValidationException) -> str: 

9 """Render a litestar/pydantic ValidationException as one user-facing string. 

10 

11 Litestar wraps pydantic errors as ``{"key": "field_name", "message": "..."}`` 

12 entries on ``exc.extra``; they flatten into a semicolon-joined string so the 

13 error envelope carries the same field names a client expects to see. 

14 """ 

15 items: list[dict[str, str]] = exc.extra if isinstance(exc.extra, list) else [] 

16 parts = [f"{err.get('key') or ''}: {err.get('message', '')}".lstrip(": ") for err in items] 

17 return "; ".join(parts) if parts else str(exc.detail)