控制器代码
public function index($id = null)
{
if ($id === null) $this->error('缺少参数');
$map = [
'status' => 1,
'id' => $id
];

$column = Db::name('cms_column')->where($map)->find();
if (!$column) $this->error('该栏目不存在');

$model = Db::name('cms_model')->where('id', $column['model'])->find();

if ($model['type'] == 2) {
$cid_all = ColumnModel::getChildsId($id);
$cid_all[] = (int)$id;

$map = [
$model['table'].'.trash' => 0,
$model['table'].'.status' => 1,
$model['table'].'.cid' => ['in', $cid_all]
];

$data_list = Db::view($model['table'], true)
->view('admin_user', 'username', $model['table'].'.uid=admin_user.id', 'left')
->where($map)
->order('create_time desc')
->paginate(config('list_rows'));
$this->assign('model', $column['model']);
} else {
$cid_all = ColumnModel::getChildsId($id);
$cid_all[] = (int)$id;

$map = [
'cms_document.trash' => 0,
'cms_document.status' => 1,
'cms_document.cid' => ['in', $cid_all]
];

$data_list = Db::view('cms_document', true)
->view('admin_user', 'username', 'cms_document.uid=admin_user.id', 'left')
->view($model['table'], '*', 'cms_document.id='. $model['table'] . '.aid', 'left')
->where($map)
->order('create_time asc')
->paginate(config('list_rows'));
$this->assign('model', '');
}

$this->assign('lists', $data_list);
$this->assign('pages', $data_list->render());
$this->assign('breadcrumb', $this->getBreadcrumb($id));
$this->assign('column_info', $column);

$template = $column['list_template'] == '' ? 'list' : substr($column['list_template'], 0, strpos($column['list_template'], '.'));
return $this->fetch($template);
}


模板代码
<div id="video_list">
<ul>{volist name="lists" id="item" length='50'}
<li>
<div><img border="0" width="100%" height="98%" src="{$item.spslt|get_file_path}"></a></div>
</li>
{/volist}



length='50' 设置了50条还是只显示20条是怎么回事呀