datawhalechina/hello-agents · error · Error

更新失败:

Error message

更新失败: 

What it means

'更新失败: ' + e (update failed) is alerted by the NovelGenerator frontend when PUT {API_URL}/chapter/update responds non-OK; the thrown Error wraps the response body text. The request updates an existing chapter {novel_id, title, note_id, content, chapter_title}; note_id is chapter.id from the local list, so stale ids after backend state loss are the dominant cause.

Source

Thrown at Co-creation-projects/lgs-only-NovelGenerator/frontend/index.html:542

                    }
                };

                const updateChapter = async (chapter) => {
                    loading.value = true;
                    currentAction.value = 'update_chapter_' + chapter.id;
                    try {
                        const res = await fetch(`${API_URL}/chapter/update`, {
                            method: 'PUT',
                            headers: {'Content-Type': 'application/json'},
                            body: JSON.stringify({
                                novel_id: project.novel_id,
                                title: project.title,
                                note_id: chapter.id,
                                content: chapter.content,
                                chapter_title: chapter.title // 支持修改标题
                            })
                        });
                        if (!res.ok) throw new Error(await res.text());
                        alert('章节更新成功');
                    } catch (e) {
                        alert('更新失败: ' + e);
                    } finally {
                        loading.value = false;
                        currentAction.value = null;
                    }
                };

                const deleteChapter = async (chapter) => {
                    if(!confirm('确定要删除这一章吗？')) return;
                    loading.value = true;
                    currentAction.value = 'delete_chapter_' + chapter.id;
                    try {
                        const params = new URLSearchParams({
                            novel_id: project.novel_id,
                            title: project.title,
                            note_id: chapter.id

View on GitHub (pinned to 606a07d341)

Solutions

1. Guard: only enable chapter editing when chapter.id is truthy.
2. Read the alert body — it distinguishes not-found from validation errors.
3. Require chapter_title and content non-empty before the PUT.
4. On 404, refresh the chapter list from the server to resync ids.

Example fix

// before
const updateChapter = async (chapter) => { /* no guard */ }

// after
const updateChapter = async (chapter) => {
  if (!chapter.id) { alert('该章节尚未生成，无法更新'); return; }
  if (!chapter.title?.trim() || !chapter.content?.trim()) { alert('标题和内容不能为空'); return; }
  // ... existing fetch
}

if (!chapter.id) { alert('该章节尚未生成，无法更新'); return; }
if (!chapter.title?.trim() || !chapter.content?.trim()) { alert('章节标题和内容不能为空'); return; }

function isChapterUpdatePayload(p: unknown): p is { novel_id: string; title: string; note_id: string; content: string; chapter_title: string } {
  return typeof p === 'object' && p !== null
    && typeof (p as { note_id?: unknown }).note_id === 'string'
    && typeof (p as { chapter_title?: unknown }).chapter_title === 'string';
}

try {
  const res = await fetch(`${API_URL}/chapter/update`, opts);
  if (!res.ok) throw new Error(`${res.status}: ${(await res.text()).slice(0, 200)}`);
  alert('章节更新成功');
} catch (e) {
  const m = e instanceof Error ? e.message : String(e);
  if (m.startsWith('404')) refreshChapterList(); // resync stale ids
  else alert('更新失败: ' + m);
}

When it happens

Trigger: PUT /chapter/update returns 404 (chapter.id unknown — backend restarted, chapter deleted, or id from a failed generate), 422 (chapter_title/content missing or empty because the edit wasn't saved), 500 storage failure. Editing a chapter whose generation never completed (id never assigned) also produces doomed requests.

Common situations: Editing right after a backend restart wiped in-memory chapters; chapter_title left blank; saving an edit on a chapter that failed to generate (no valid id).

Related errors

• 保存失败:
• 删除失败:
• 大纲生成失败:
• 章节生成失败:
• 请求失败

AI-assisted analysis of datawhalechina/hello-agents@606a07d341 (2026-08-14). Data as JSON: /api/errors/bcacbd78b9fa8b77. Report an issue: GitHub.