在Symfony 2.2中无法使用Twig访问对象属性值

Question

I cannot access the objects properties using the Twig dot notation. For example, from looking at the object dump, I should be able to do image.copyright, which should print "Blue button near the Cayman Islands, Caribbean (© Lawson Wood/Aurora Photos)" for the first item.

The error message I get is

Method "copyright" for object "SimpleXMLElement" does not exist in ARRaiDesignBundle:Default:wallpapers.html.twig at line 12

While dumping the object using dump(image) dumps each of the objects.

Controller class:

$host = 'http://www.bing.com';
$file = $host . '/HPImageArchive.aspx?format=xml&idx=0&n=10&mkt=en-US';
$xml = simplexml_load_file($file);

return $this->render('ARRaiDesignBundle:Default:wallpapers.html.twig', array('xml' => $xml, 'host' => $host));

wallpapers.html.twig file:

...
{% for image in xml %}
<p><pre>{{ image.copyright }}</pre></p>
{% endfor %}
...

Object dump using dump(image) in Twig:

object(SimpleXMLElement)#268 (12) {
  ["startdate"]=>
  string(8) "20130330"
  ["fullstartdate"]=>
  string(12) "201303300000"
  ["enddate"]=>
  string(8) "20130331"
  ["url"]=>
  string(46) "/az/hprichbg/rb/BlueButton_EN-US1108621411.jpg"
  ["urlBase"]=>
  string(43) "/az/hprichbg/rb/BlueButton_EN-US10208337365"
  ["copyright"]=>
  string(77) "Blue button near the Cayman Islands, Caribbean (© Lawson Wood/Aurora Photos)"
  ["copyrightlink"]=>
  string(74) "http://www.bing.com/search?q=Blue+Button+%28Porpita+porpita%29&form=hpcapt"
  ["drk"]=>
  string(1) "1"
  ["top"]=>
  string(1) "1"
  ["bot"]=>
  string(1) "1"
...

Can anyone suggest how to do this? I know I can use PHP rendering instead of Twig, but that's not a fix for me. Thanks.

Answer 1

This was happening due to Bing's werid XML structure, the last bit is not iterative friendly. With standard PHP it's fine, but with Twig, it doesn't catch the errors for the last element.

<images>
<image>...</image>
<image>...</image>
<image>...</image>
<image>...</image>
<image>...</image>
<image>...</image>
<image>...</image>
<image>...</image>
<tooltips>...</tooltips>
</images>

To fix this, I just unset tooltips. "unset($xml->tooltips)"

Thanks @JaredFarrish for providing clean xml. :)