variables - 重置 joomla 状态变量

Question

我有一个项目列表页面和一个用于搜索的过滤区域。为了从过滤器表单中传递和检索变量，我使用 getUserStateFromRequest 然后我根据这些列出项目。但是当我在行或其他视图之间移动时，我返回我想重置变量以查看整个列表，但它没有。我想我应该在视图改变时重新设置它们。如何控制这个或任何其他建议？

Answer 1

也许您根本不想使用getUserStateFromRequest。getUserStateFromRequest 将请求变量存储到用户会话。如果您希望在离开页面时重置状态，您可以选择不在用户会话中保存变量。

在您的模型 populateState 中，类似于：

$app = JFactory::getApplication();
$search_term = $app->input->get('search_term', null, 'CMD');
$this->setState('filter.search_term', $search_term);

然后检索状态（仍在您的模型中）：

$search_term = $this->getState('filter.search_term');
if($search_term != null)
    $query->where('my_field = ' . $db->quote($search_term));

请注意，代码未经测试。

Answer 2

您可以像这样重置活动过滤器，然后将 resetuserstate=1 添加到查询中：

---

protected function populateState($ordering = null, $direction = null) {

    ... ... ...

    parent::populateState('a.title', 'asc');

    $activefilters=$this->getActiveFilters();
    $jinput = JFactory::getApplication()->input;
    $resetUserState=(bool) $jinput->get("resetuserstate",0, 'INT');        

    if ($resetUserState) {
        foreach ($activefilters as $activefilter => $filterstate) {
            // clearing filters
            $app->setUserState($this->contect . 'filter.'. $activefilter, '');
            $this->setState('filter.'.$activefilter,'');

        }
    } 
}

---

注意：当您通过错误地设置过滤器来混淆用户状态时会发生奇怪的事情，登录和注销也会清除用户状态并且有时会有所帮助。

Answer 3

我仍然无法解决我的问题：S。得到是没有用的。这些代码有什么区别

            $mainframe  =& JFactory::getApplication();

    $filter_carryingW   = $mainframe->input->get( 'filter_carryingW', '', 'int' );
    $filter_carryingF   = $mainframe->input->get( 'filter_carryingF', '', 'int' );
    $filter_services    = $mainframe->input->get( 'filter_services', '', 'int' );
    $filter_country     = $mainframe->input->get( 'filter_country', '', 'word' );
    $filter_city        = $mainframe->input->get( 'filter_city', '', 'int' );
    $filter_town        = $mainframe->input->get( 'filter_town', '', 'int' );

    $this->setState('com_dratransport.members.filter_carryingW' , $filter_carryingW);
    $this->setState('com_dratransport.members.filter_carryingF' , $filter_carryingF);
    $this->setState('com_dratransport.members.filter_services'  , $filter_services);
    $this->setState('com_dratransport.members.filter_country'       , $filter_country);
    $this->setState('com_dratransport.members.filter_city'      , $filter_city);
    $this->setState('com_dratransport.members.filter_town'      , $filter_town);

    $f['filter_carryingW']  = $this->getState('com_dratransport.members.filter_carryingW');
    $f['filter_carryingF']  = $this->getState('com_dratransport.members.filter_carryingF');
    $f['filter_services']   = $this->getState('com_dratransport.members.filter_services');
    $f['filter_country']    = $this->getState('com_dratransport.members.filter_country');
    $f['filter_city']       = $this->getState('com_dratransport.members.filter_city');
    $f['filter_town']       = $this->getState('com_dratransport.members.filter_town');

和

            $f['filter_carryingW']  = $mainframe->input->get( 'filter_carryingW', '', 'int' );
    $f['filter_carryingF']  = $mainframe->input->get( 'filter_carryingF', '', 'int' );
    $f['filter_services']   = $mainframe->input->get( 'filter_services', '', 'int' );
    $f['filter_country']    = $mainframe->input->get( 'filter_country', '', 'word' );
    $f['filter_city']       = $mainframe->input->get( 'filter_city', '', 'int' );
    $f['filter_town']       = $mainframe->input->get( 'filter_town', '', 'int' );