datawhalechina/hello-agents · warning · ValueError

user_id 不能为空

Error message

user_id 不能为空

What it means

Pydantic field_validator error on HealthRequest: user_id must be 1-256 chars and non-empty after stripping. A whitespace-only value passes min_length but fails this check, and FastAPI returns 422 for POST /health/analysis.

Source

Thrown at Co-creation-projects/Shawnxyxy-HealthRecordAgent/backend/api/routes/health.py:25

from pydantic import BaseModel, Field, field_validator

from memory.store import get_report_run, list_report_runs_for_user
from service.observability_views import build_report_observability
from service.health_analysis import HealthAnalysisService

router = APIRouter()


class HealthRequest(BaseModel):
    report_text: str
    user_id: str = Field(..., min_length=1, max_length=256)

    @field_validator("user_id")
    @classmethod
    def normalize_user_id(cls, v: str) -> str:
        v = v.strip()
        if not v:
            raise ValueError("user_id 不能为空")
        return v


@router.post("/health/analysis")
async def analysis_health(request: HealthRequest):
    task_id = str(uuid4())

    service = HealthAnalysisService(task_id=task_id, user_id=request.user_id)
    asyncio.create_task(service.run(request.report_text, request.user_id))

    return {"task_id": task_id, "user_id": request.user_id}


@router.post("/health/analysis/pdf")
async def analysis_health_pdf(
    file: UploadFile = File(...),
    user_id: str = Form(...),
):

View on GitHub (pinned to 606a07d341)

Solutions

1. Send a trimmed, real user identifier in the request body.
2. Add client-side required-field validation for user_id before submit.
3. Read the 422 detail to confirm which field failed.

Example fix

# before
requests.post(f'{base}/health/analysis', json={'report_text': txt, 'user_id': '  '})  # 422

# after
requests.post(f'{base}/health/analysis', json={'report_text': txt, 'user_id': 'u123'})

uid = user_id.strip()
if not uid:
    raise ValueError("user_id required")
requests.post(f"{base}/health/analysis", json={"report_text": txt, "user_id": uid})

def is_valid_user_id(v) -> bool:
    return isinstance(v, str) and 1 <= len(v.strip()) <= 256

When it happens

Trigger: POST /health/analysis with user_id=" " or an empty/whitespace string in the JSON body.

Common situations: Frontend sending untrimmed input fields; default placeholder values in forms; test payloads with blank ids.

Related errors

• user_id 不能为空
• HTTP ${res.status}
• diet_run_id 不存在
• user_id 无效
• movie_id 必须为正整数

AI-assisted analysis of datawhalechina/hello-agents@606a07d341 (2026-08-14). Data as JSON: /api/errors/b108817dc09a049b. Report an issue: GitHub.