What causes "未找到相关新闻（{time_desc}）" in sansan0/TrendRadar?

Widen the date range or drop the platforms filter.

sansan0/TrendRadar · warning · DataNotFoundError

DATA_NOT_FOUND

DATA_NOT_FOUND

Error message

未找到相关新闻（{time_desc}）

What it means

DataNotFoundError from the news-collection loop in analytics.py: after walking each date from start to end (skipping days whose per-day read raises DataNotFoundError), all_news_items is still empty. time_desc renders '今天' when start==end, else the explicit date span. Code DATA_NOT_FOUND.

Source

Thrown at mcp_server/tools/analytics.py:763

                            }

                            # 条件性添加 URL 字段
                            if include_url:
                                news_item["url"] = info.get("url", "")
                                news_item["mobileUrl"] = info.get("mobileUrl", "")

                            all_news_items.append(news_item)

                except DataNotFoundError:
                    # 该日期没有数据，继续下一天
                    pass

                # 下一天
                current_date += timedelta(days=1)

            if not all_news_items:
                time_desc = "今天" if start_date == end_date else f"{start_date.strftime('%Y-%m-%d')} 至 {end_date.strftime('%Y-%m-%d')}"
                raise DataNotFoundError(
                    f"未找到相关新闻（{time_desc}）",
                    suggestion="请尝试其他话题、日期范围或平台"
                )

            # 去重（同一标题只保留一次）
            unique_news = {}
            for item in all_news_items:
                key = f"{item['platform']}::{item['title']}"
                if key not in unique_news:
                    unique_news[key] = item
                else:
                    # 合并 ranks（如果同一新闻在多天出现）
                    existing = unique_news[key]
                    existing["ranks"].extend(item["ranks"])
                    existing["count"] = len(existing["ranks"])

            deduplicated_news = list(unique_news.values())

View on GitHub (pinned to 8ee26026ba)

Solutions

Widen the date range or drop the platforms filter.
Use a broader/shorter topic term that is more likely to be a title substring.
Confirm crawled data exists for at least some days in the range (see the parser-level DATA_NOT_FOUND for how per-day reads work).
If expecting today's data, verify the crawler ran today.

Defensive patterns

Strategy: try-catch

Try / catch

try:
    news = tools._collect_news(topic, start, end, platforms)
except DataNotFoundError:
    news = []  # render an explicit 'no coverage' state instead of propagating

Prevention

Loosen platform filters and widen date ranges when coverage is thin.
Use broad topic terms likely to appear verbatim in headlines.
Treat this as an empty-result condition in the UI, not an error.

When it happens

Trigger: Searching a topic that appears in no titles during the range; range entirely composed of days with no crawled data; platform filter excluding every platform that mentioned the topic; overly specific topic phrasing that must match title text.

Common situations: Hot-topic analysis for a niche keyword; historical ranges predating the first crawl; combining a narrow date_range with a platforms filter that removes the only relevant source; crawler outage over the whole window.

Related errors

AI-assisted analysis of sansan0/TrendRadar@8ee26026ba (2026-08-15). Data as JSON: /api/errors/120d4fdaffa585ba. Report an issue: GitHub.