这会这个调用厉害了，我能想到的参数都放上了，还能差什么参数？有这一个玩意配上自定义字段就天下无敌了。

$this->widget('Random@anything', 'order=viewsNum&limit=6&date=Week&asc=1&authorid=1&mids=1,2,3,4&fields=thumbnail')->to($anything);
class Random extends Widget_Abstract_Contents
{
    /**
     * 增加条件调用
     *
     * 方法：$this->widget('Random@anything', 'order=viewsNum&limit=6&date=Week&asc=1&authorid=1&mids=1,2,3,4&fields=thumbnail')->to($anything);
     * order参数：viewsNum(*),commentsNum,likesNum(*),rand(),cid,slug，默认created，*的你不一定有这个。
     * asc参数： 参数任意，有就行，用于倒序排列
     * date参数：Day,Week,Month,Year,All 数字以秒计算往前推，All是全部，也是默认选项
     * mids参数：分类的mid，英文逗号隔开所有分类
     * limit参数：就是限制调用个数
     * authorid参数：指定作者id，默认不指定
     * fields参数：自定义字段的参数，就是自定义，可以用于各种指定调用，我主要用来调用置顶、幻灯片。
     */
    public function execute()
    {
        //设置默认参数，就是调用时候一个参数不设置的时候，只有这三个参数
        $this->parameter->setDefault(['limit' => $this->options->pageSize, 'order' => 'created','date' => 'All']);
        //设置时间期限data参数
        switch ($this->parameter->date) {
            case 'Day'   : $this->parameter->date = 86400;    break;
            case 'Week'  : $this->parameter->date = 604800;   break;
            case 'Month' : $this->parameter->date = 2592000;  break;
            case 'Year'  : $this->parameter->date = 31536000; break;
            case 'All'  : $this->parameter->date = $this->options->time; break;
        }
        //设置排序参数order
        $order = $this->parameter->order;
        if ($order=rand()){
            $order = $this->parameter->order;
        } else {
            $order = 'table.contents.'.$this->parameter->order;
        }
        //通用选择，包含了日期和排序
        $select= $this->select()->from('table.contents')
            ->join('table.relationships', 'table.contents.cid = table.relationships.cid')
            ->where('table.contents.type = ?', 'post')
            ->where('table.contents.status = ?', 'publish')
            ->where('table.contents.created < ?', $this->options->time)
            ->where('table.contents.created > ?', $this->options->time - $this->parameter->date)
            ->where('table.contents.type = ?', 'post')
            ->order($order, $this->parameter->asc?Typecho\Db::SORT_ASC:Typecho\Db::SORT_DESC);
        //指定作者id判断
        if($this->parameter->authorid){
            $select = $select->where('table.contents.authorid = ?', $this->parameter->authorid);
        }
        //判断是否指定分类，标签也行
        if($this->parameter->mids){
            $mids = explode(',', $this->parameter->mids);
            $mids = array_unique($mids);
            $select = $select->where('table.relationships.mid in ?', $mids);
        }
        //自定义字段的判断
        if($this->parameter->fields) {
            $select = $select
            ->join('table.fields', 'table.contents.cid = table.fields.cid')
            ->where('table.fields.name = ?', $this->parameter->fields);
        }

        $select = $select
            ->group('table.contents.cid')
            ->limit($this->parameter->limit);

        $this->db->fetchAll($select,[$this, 'push']);
    }
}