Tencent/WeKnora · error

ego center slug %q not found

Error message

ego center slug %q not found

What it means

In ego-graph mode, computeGraphSubset requires req.Center to name an existing page slug. If the slug is empty it errors differently; if the slug is non-empty but no page matches, it returns 'ego center slug %q not found'. The graph cannot be built without a valid center node.

Source

Thrown at internal/application/service/wiki_page.go:631

		}
	}

	pageBySlug := make(map[string]*types.WikiPage, len(pages))
	linkCount := make(map[string]int, len(pages))
	for _, p := range pages {
		pageBySlug[p.Slug] = p
		linkCount[p.Slug] = len(p.InLinks) + len(p.OutLinks)
	}

	// Select the node slug set for the requested slice.
	var selected map[string]struct{}
	switch mode {
	case types.WikiGraphModeEgo:
		if req.Center == "" {
			return nil, errors.New("ego graph requires a center slug")
		}
		if _, ok := pageBySlug[req.Center]; !ok {
			return nil, fmt.Errorf("ego center slug %q not found", req.Center)
		}
		depth := req.Depth
		if depth < 1 {
			depth = 1
		}
		selected = bfsEgoSlugs(pageBySlug, req.Center, depth, typeAllow, req.Limit)
	default:
		// overview: keep only type-allowed candidates, sort by link_count desc, cap.
		candidates := make([]*types.WikiPage, 0, len(pages))
		for _, p := range pages {
			if hasTypeFilter && !typeAllow[p.PageType] {
				continue
			}
			candidates = append(candidates, p)
		}
		sort.SliceStable(candidates, func(i, j int) bool {
			li := linkCount[candidates[i].Slug]
			lj := linkCount[candidates[j].Slug]

View on GitHub (pinned to 988cbb0330)

Solutions

1. Resolve the page slug via the index/list API and confirm it exists in the target KB before requesting an ego graph.
2. Check for typos, trailing whitespace, or case mismatches in the Center field.
3. Verify the page was not deleted or renamed; re-fetch current slugs.
4. Fall back to overview graph mode when the center is unknown.

Example fix

// before
req := types.WikiGraphRequest{Mode: types.WikiGraphModeEgo, Center: "My Page"}
// after
req := types.WikiGraphRequest{Mode: types.WikiGraphModeEgo, Center: "my-page"} // verified existing slug

page, err := pageSvc.GetBySlug(ctx, kbID, centerSlug)
if err != nil || page == nil {
    return fmt.Errorf("cannot build ego graph: slug %q not in KB %s", centerSlug, kbID)
}

func hasValidCenter(slugs map[string]*types.WikiPage, center string) bool {
    return center != "" && slugs[center] != nil
}

graph, err := svc.GetGraph(ctx, kbID, req)
if err != nil && strings.Contains(err.Error(), "ego center slug") {
    log.Warnf("center %q missing, falling back to overview", req.Center)
    req.Mode = types.WikiGraphModeOverview
    graph, err = svc.GetGraph(ctx, kbID, req)
}

When it happens

Trigger: Calling GetGraph with mode=ego and a Center slug that does not exist in the knowledge base (typo, deleted page, wrong KB, or slug casing/normalization mismatch).

Common situations: Page was renamed or deleted after the client cached the slug; client sends a page title or URL path instead of the slug; requesting across the wrong knowledge base ID; case-sensitive slug comparison vs normalized display names.

Related errors

• invite code has expired
• join request not found
• failed to retrieve: %s
• opensearch: index not found
• 2201

AI-assisted analysis of Tencent/WeKnora@988cbb0330 (2026-09-02). Data as JSON: /api/errors/41063dd32177d1cb. Report an issue: GitHub.