Question

我在Yii中遇到Trying to get property of non-object错误。代码曾经工作过，然而一个同事做了一些改变，现在出现了一个错误，我不能为我的生活弄清楚什么是坏的。

以下是来自applciation.log的堆栈跟踪和错误消息：

2014/07/02 09:39:35 [error] [php] Trying to get property of non-object (/home/jhvisser/web/inventory/web/inventory/protected/models/Inventory.php:454)
Stack trace:
#0 /home/jhvisser/web/inventory/web/framework/web/actions/CAction.php(104): ReflectionMethod->invokeArgs()
#1 /home/jhvisser/web/inventory/web/framework/web/actions/CInlineAction.php(48): CInlineAction->runWithParamsInternal()
#2 /home/jhvisser/web/inventory/web/framework/web/CController.php(300): CInlineAction->runWithParams()
#3 /home/jhvisser/web/inventory/web/framework/web/filters/CFilterChain.php(134): InventoryController->runAction()
#4 /home/jhvisser/web/inventory/web/framework/web/filters/CFilter.php(41): CFilterChain->run()
#5 /home/jhvisser/web/inventory/web/framework/web/CController.php(1144): CAccessControlFilter->filter()
#6 /home/jhvisser/web/inventory/web/framework/web/filters/CInlineFilter.php(59): InventoryController->filterAccessControl()
#7 /home/jhvisser/web/inventory/web/framework/web/filters/CFilterChain.php(131): CInlineFilter->filter()
#8 /home/jhvisser/web/inventory/web/framework/web/CController.php(283): CFilterChain->run()
#9 /home/jhvisser/web/inventory/web/framework/web/CController.php(257): InventoryController->runActionWithFilters()
#10 /home/jhvisser/web/inventory/web/framework/web/CWebApplication.php(277): InventoryController->run()
#11 /home/jhvisser/web/inventory/web/framework/web/CWebApplication.php(136): CWebApplication->runController()
#12 /home/jhvisser/web/inventory/web/framework/base/CApplication.php(158): CWebApplication->processRequest()
#13 /home/jhvisser/web/inventory/web/inventory/index.php(14): CWebApplication->run()
REQUEST_URI=/inventory/web/inventory/index.php?r=inventory/update&id=14760

如果你查看下面的代码，这是在这个函数中发生的错误，特别是在包含以下代码的行：$attr = $val->attributes;。完整的功能代码如下。我很困惑这里的错误是什么。

//get various dropdown fields for UI and validation
public function getDropdown($validate = false)
{
    //make objects
    $feed['equipmentType'] = AuxEquipmentType::model()->findAll();
    $feed['sponsors'] = AuxSponsors::model()->findAll();
    $feed['licences'] = AuxLicences::model()->findAll();
    $feed['groups'] = AuxGroups::model()->findAll();
    $feed['policyEight'] = AuxPolicyEight::model()->findAll();
    $feed['supportClass'] = AuxSupportClass::model()->findAll();
    $feed['special'] = AuxSpecial::model()->findAll();
    $feed['domain'] = AuxDomain::model()->findAll();
    if(!$validate && MAINTAIN_ON)
    {
        $maintain = new Maintain();
        $feed['freeIP'] = $maintain->getFreeIP();
    }
    //get keys of which fields to take and make the string display and value columns with
    $headers = array(
                'sponsors' => array('key' => 'code', 'val' => array('code', 'fullName', 'description')),
                'licences' => array('key' => 'lKey', 'val' => array('licenceName')),
                'groups' => array('key' => 'gr_name', 'val' => array('gr_name')),
                'supportClass' => array('key' => 'value', 'val' => array('value')),
                'special' => array('key' => 'value', 'val' => array('value')),
                'equipmentType' => array('key' => 'value', 'val' => array('value')),
                'domain' => array('key' => 'domain', 'val' => array('domain')),
                'freeIP' => array('key' => 'name', 'val' => array('rang')),
                'policyEight' => array('key' => 'value', 'val' => array('value')),
            );
    $out = array();

    foreach($feed as $field => $value)
    {
        foreach($value as $fld => $val)
        {
            $attr = $val->attributes;  //** THIS LINE IS GIVING THE ERROR **
            if(!$validate)
            {
                if($field == 'freeIP')
                    $attr = $val;
                $option = array();
                foreach($headers[$field]['val'] as $va)
                    $option[] = $attr[$va];
                $out[$field][$attr[$headers[$field]['key']]] = implode(' - ', $option); 
            }
            else
                $out[$field][] = $attr[$headers[$field]['key']];
        }
    }
    return $out;
}

Answer 1

代码块：

if($field == 'freeIP')
    $attr = $val;

位于错误的位置，因为该数组与其他$ feed元素的结构不同。

将代码更改为以下内容以更正错误：

if($field == 'freeIP')
    $attr = $val;
else 
    $attr = $val->attributes;

尝试使用Yii框架获取非对象的属性

1 个答案: