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Getting warning/notice Trying to get property of non-object in layout.phtml


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Getting notice/warning in this line:

Notice: Trying to get property of non-object in C:\Program Files\Zend\Apache2\htdocs\mysite\application\layouts\scripts\layout.phtml on line 19

echo $this->navigation()->menu()->setAcl($obj_menuacl)->setRole($_auth->getStorage()->read()->uid);

<head>
<?php echo $this->headScript()->appendFile($this->baseUrl() . '/js/jwplayer.js'); ?>
<?php echo $this->headScript()->appendFile($this->baseUrl() . '/js/swfobject.js'); ?>
<?php echo $this->headLink()->prependStylesheet($this->baseUrl().'/css/topmenu.css'); ?>
</head>

<?php
$flXml=new Zend_Config_Xml(APPLICATION_PATH.'/configs/navigation.xml','nav');
$container = new Zend_Navigation($flXml);
Zend_Registry::set('Zend_Navigation', $container);
?>

<div id="nav-menu">
<?php
$obj_menuacl=new Model_MenuAcl();

$_auth=Zend_Auth::getInstance();

echo $this->navigation()->menu()->setAcl($obj_menuacl)->setRole($_auth->getStorage()->read()->uid);
echo $this->loggedInAs();
echo '<br><br>';
echo 'You are in: ' . $this->navigation()->breadcrumbs()->setLinkLast(false)->setMinDepth(0)->render();
?></div>
<div class="mainbody"><?php echo $this->layout()->content; ?></div>
<br />

Wow, you're trying to do a lot in one line...whenever I get these types of errors on one-line-wonders that I try, I usually break it down to see which function is returning a non-obect:

$nav = $this->navigation();
$menu = $nav->menu();
$menu->setAcl($obj_menuacl);
$storage = $_auth->getStorage();
$read = $storage->read();
$uid = $read->uid;
$menu->setRole($uid);

Use this to figure out which line is returning the non-object. Once you figure out where it is, you can reconstruct it back to the way you had it (after you fix the bad object) if you'd like.

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