实例讲解redis的hash散列类型

public function writePost(Request $requset, $title, $content, $slug) {
    $title = $requset->param('title');
    $content = $requset->param('content');
    $slug = $requset->param('slug');
    // 获取文章自增id
    $postId = $this->redis->incr('posts:count');
    // 判断文章缩略名是否已存在
    $isSlugAvailable = $this->redis->hsetnx("slug.to.id", $slug, $postId);
    if (!$isSlugAvailable) { // 已存在
        echo $slug . "-文章缩略名已用过，请更换!";
    } else {
        $data = array(
            'title' => $title,
            'content' => $content,
            'slug' => $slug,
        );
        $this->redis->hmset("post:{$postId}", $data);
        echo "文章发布成功，id为：{$postId}";
    }
}

public function getPost(Request $requset, $slug) {
    $slug = $requset->param('slug');
    $postId = $this->redis->hget('slug.to.id', $slug);
    if ($postId) {
        $postData = $this->redis->hgetall("post:{$postId}");
        var_dump($postData);
        exit;
    } else {
        echo '该文章不存在!';
    }
}

public function updateSlug(Request $requset, $slug, $id) {
    $slug = $requset->param('slug');
    $postId = $requset->param('id');
    $isSlugAvailable = $this->redis->hsetnx('slug.to.id', $slug, $postId);
    if (!$isSlugAvailable) {
        echo '该缩略名已存在!';
    } else {
        // 获取旧的缩略名
        $oldSlug = $this->redis->hget("post:{$postId}", 'slug');
        // 设置新的缩略名
        $this->redis->hset("post:{$postId}", 'slug'  , $slug);
        // 删除旧的缩略名
        $this->redis->hdel("slug.to.id", $oldSlug);
    }
}