Method Update

pkg/knowledge/manager.go:328–409

Update 更新知识项

(ctx context.Context, item *KnowledgeItem)

// Update 更新知识项
func (m *manager) Update(ctx context.Context, item *KnowledgeItem) error {
	if item == nil {
		return errors.New("knowledge: item cannot be nil")
	}

	if item.ID == "" {
		return errors.New("knowledge: item ID cannot be empty")
	}

	m.mu.Lock()
	defer m.mu.Unlock()

	// 检查是否存在
	existing, err := m.getItemFromMemory(ctx, item.ID)
	if err != nil {
		return fmt.Errorf("knowledge: item not found: %w", err)
	}

	// 更新时间戳
	item.UpdatedAt = time.Now()
	item.CreatedAt = existing.CreatedAt // 保持创建时间

	// PII检测
	if m.piiStrategy != nil {
		if sanitized := m.sanitizeContent(item); sanitized != item {
			item = sanitized
		}
	}

	// 重新生成向量（如果内容变化）
	if m.config.AutoEmbed && (item.Content != existing.Content || len(item.Embedding) == 0) {
		embedding, err := m.generateEmbedding(ctx, item)
		if err != nil {
			return fmt.Errorf("knowledge: failed to generate embedding: %w", err)
		}
		item.Embedding = embedding
	}

	// 重新计算质量
	item.Quality = m.calculateQuality(item)

	// 保存到内存
	if err := m.saveItemToMemory(ctx, item); err != nil {
		return fmt.Errorf("knowledge: failed to save updated item to memory: %w", err)
	}

	// 更新向量存储
	if len(item.Embedding) > 0 {
		doc := vector.Document{
			ID:        item.ID,
			Text:      item.Content,
			Embedding: item.Embedding,
			Metadata: map[string]any{
				"type":     string(item.Type),
				"category": item.Category,
				"tags":     strings.Join(item.Tags, ","),
				"source":   item.Source,
				"author":   item.Author,