Hi!

I've been trying to get the GeidField to work for my project, but I always end up with an error..
I'm new to Silverstripe so I probobly just made a mistake somewhere..

Well, my problem is that I get this error message:

Fatal error: Call to a member function getName() on a non-object in ...\framework\forms\FieldList.php on line 405

I have a page extention where I want to have a grid field to add childs..

- - PlayerPage.php - -

<?php
class PlayerPage extends Page {
	static $description = "Video player page";
	static $db = array(
		"VideoURL" => "Varchar",
		"SpeakerVideoURL" => "Varchar"
  	);

	static $has_one = array(
		"Sidebar" => "WidgetArea",
		'VideoPhoto' => 'Image',
		'SpeakerVideoPhoto' => 'Image',
		'Video' => 'Video',
		'SpeakerVideo' => 'Video'
	);
	
	static $has_many = array(
		"Chapters" => "Chapter"
	);
	
	public function getCMSFields() {
		$fields = parent::getCMSFields();
		
		/* Video tab */
		$fields->addFieldToTab("Root.Video", new TextField('VideoURL', 'URL to main video'));
		$fields->addFieldToTab("Root.Video", new UploadField('Video', 'Main video'));
		$fields->addFieldToTab("Root.Video", new UploadField('VideoPhoto', 'Poster image for main video'));
		$fields->addFieldToTab("Root.Video", new TextField('SpeakerVideoURL', 'URL to speaker video'));
		$fields->addFieldToTab("Root.Video", new UploadField('SpeakerVideo', 'Speaker video'));
		$fields->addFieldToTab("Root.Video", new UploadField('SpeakerVideoPhoto', 'Poster image for speaker video'));
		
		/* Chapters tab */
		
		$itemsInGrid = $this->Chapters();
		//$itemsInGrid = DataList::create('Chapter'); 
				
		$gridColumns = new GridFieldDataColumns();
		
		$gridColumns->setDisplayFields(array(
			'Name' => 'Name',
			'Type' => 'Type',
			'StartTime' => 'Start time',
			'EndTime' => 'End time'		
		));	
		
		$gridFieldConfig = GridFieldConfig::create()->addComponents( 
		new GridFieldToolbarHeader(), 
		new GridFieldAddNewButton('toolbar-header-right'), 
		new GridFieldSortableHeader(), 
		//new GridFieldDataColumns(), 
		new GridFieldPaginator(10), 
		new GridFieldEditButton(), 
		new GridFieldDeleteAction(), 
		new GridFieldDetailForm() ,
		$gridColumns 
		);
		
		$gridField = new GridField("Chapters", "Chapters", $itemsInGrid, $gridFieldConfig);
		
		$fields->addFieldToTab("Root.Chapters", $GridField);
		
		/* Widgets tab */
		$fields->addFieldToTab("Root.Widgets", new WidgetAreaEditor("Sidebar"));

		return $fields;
	}
	
}
class PlayerPage_Controller extends Page_Controller {

}

- - Chapters.php - -

<?php
class Chapter extends DataObject {
	static $db = array(
		"Name" => "Varchar",
		"Type" => "Varchar",
		"StartTime" => "Decimal",
		"EndTime" => "Decimal"
	);

	static $has_one = array(
		"Player" => "PlayerPage"
	);
	
	static $summary_fields = array( 
		'Name' => 'Name',
		'Type' => 'Type', 
		'StartTime' => 'Start time', 
		'EndTime' => 'End time' 
	); 
	
	public function getName() {
		return "Chapter";
	}
	
	public function getCMSFields() {
		$fields = parent::getCMSFields();
		return $fields;
	}
}

Sense the error says that it's calling a non-object I'm guessing that "$this->Chapters();" isn't geting the chapters..

Thanks in advance for any help that could put me back on track again.

//Oscar

The problem might be that you have a typo in your code: $GridField != $gridField
It should be:

$gridField = ...
$fields->addFieldToTab("Root.Chapters", $gridField); 

Haha

That was the problem.

And I spent hours looking for what was wrong..

Thanks for the help!