DIYgod/RSSHub · error · InvalidParameterError

Invalid ranking type: ${type}

Error message

Invalid ranking type: ${type}

What it means

Thrown by syosetu/ranking.ts:259 as an InvalidParameterError in the default arm of the rankingType switch, when the `listType` path param is not 'list', 'genre', or 'isekai' (RankingType enum, types/ranking.ts:17). Reached via /syosetu/ranking/<listType>/<type>. Minor diagnostic wart: the message echoes `type` (the second segment) rather than `listType` (the actual offending value), which can mislead during debugging.

Source

Thrown at lib/routes/syosetu/ranking.ts:259

        case RankingType.GENRE: {
            const { period, genre, novelType } = parseGenreRankingType(type);
            rankingUrl = `https://yomou.syosetu.com/rank/genrelist/type/${type}`;
            rankingTitle = `[${periodToJapanese[period]}] ${GenreNotation[genre]}ランキング - ${novelTypeToJapanese[novelType]} BEST${limit}`;

            searchParams.order = periodToOrder[period];
            searchParams.genre = genre as Genre;
            if (novelType !== NovelType.TOTAL) {
                searchParams.type = novelType;
            }
            break;
        }

        case RankingType.ISEKAI:
            return handleIsekaiRanking(type, limit);

        default:
            throw new InvalidParameterError(`Invalid ranking type: ${type}`);
    }

    const builder = new SearchBuilder(searchParams, api);
    const result = await builder.execute();

    const items = result.values.map((novel, index) => ({
        title: `#${index + 1} ${novel.title}`,
        link: `https://ncode.syosetu.com/${String(novel.ncode).toLowerCase()}`,
        description: renderDescription({ novel }),
        author: novel.writer,
        category: novel.keyword.split(/[\s/\u{FF0F}]/u).filter(Boolean),
    }));

    return {
        title: `小説家になろう - ${rankingTitle}`,
        link: rankingUrl,
        item: items as DataItem[],
        language: 'ja',

View on GitHub (pinned to bed535e087)

Solutions

1. Use exactly list, genre, or isekai (lowercase) as the listType segment.
2. Cross-check with the route example: /syosetu/ranking/list/daily_total?limit=50.

Example fix

// before
GET /syosetu/ranking/genere/daily_101_total
// after
GET /syosetu/ranking/genre/daily_101_total

import { RankingType } from './types/ranking';

function isValidListType(listType: string): boolean {
  return Object.values(RankingType).includes(listType as RankingType);
}

import { RankingType } from './types/ranking';

function isRankingType(listType: string): listType is RankingType {
  return ['list', 'genre', 'isekai'].includes(listType);
}

When it happens

Trigger: /syosetu/ranking/<listType>/<type> with listType not in {list, genre, isekai}: typos like 'lists', 'genere', 'isekait', or a pluralized/uppercase variant.

Common situations: Guessing the listType; copy-paste typo; using a value valid in a different syosetu route.

Related errors

• Invalid isekai ranking type: ${type}
• Invalid ranking type: ${type}
• Invalid general ranking type: ${type}
• Invalid genre ranking type: ${type}
• Invalid subsite: ${sub}

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/ada6e252d748e9b2. Report an issue: GitHub.