Method IsEmpty

internal/repository/cache/post.go:120–131

IsEmpty 检查是否存在空对象标记

(ctx context.Context, key string)

// IsEmpty 检查是否存在空对象标记
func (c *postCache) IsEmpty(ctx context.Context, key string) (bool, error) {
	if key == "" {
		return false, fmt.Errorf("无效的帖子ID: %s", key)
	}

	exists, err := c.client.Exists(ctx, c.emptyKey(key)).Result()
	if err != nil {
		return false, err
	}

	return exists > 0, nil
}

// PreHeat 预热热点缓存,设置更长的过期时间
func (c *postCache) PreHeat(ctx context.Context, posts []domain.Post) error {