Following the ComplexTableField example in Chapter 5 of the SilverStripe book, I've added a news item section for my home page with the following code:

NewsItem.php

class NewsItem extends DataObject {
   static $db = array(
      'Headline' => 'Varchar',
      'Text' => 'Text',
      'StartDate' => 'Date',
      'EndDate' => 'Date',
      'Link' => 'Varchar'
   );
   
   function getCMSFields() {
      $fields = new FieldSet(
         new TextField('Headline', 'Headline'),
         new TextareaField('Text', 'Blurb'),
         new TextField('Link', 'Link'),
         new DateField('StartDate', 'Start Date'),
         new DateField('EndDate', 'End Date')
      );
      return $fields;
   }
}

HomePage.php

class HomePage extends Page {
   static $db = array(
   );
   
   static $has_many = array(
      'HomePageNews' => 'NewsItem'
   );

   function getCMSFields() {
      $fields = parent::getCMSFields();
      $newsTable = new ComplexTableField($this, 'HomePageNews', 'NewsItem', array('Headline'=>'Headline', 'StartDate'=>'StartDate', 'EndDate'=>'EndDate'));
      $fields -> addFieldToTab('Root.Content.NewsItems', $newsTable);
      return $fields;
   }
}
class HomePage_Controller extends Page_Controller {
}

For the most part things work...I have a lovely new "News Items" tab in the CMS, when I select add I get a pop-up with all of the correct fields, and the news items are saved and deleted from the database as expected.

However, the show and edit buttons produce a "500 - Internal server error" and the SilverStripe log shows:

[27-May-2010 02:49:29] Warning at \sapphire\core\model\DataObject.php line 1328: array_flip() [<a href='function.array-flip'>function.array-flip</a>]: The argument should be an array (http://www.devtechsys.mirror/admin/EditForm/field/HomePageNews/item/1/show?ajax=1)

Thoughts?

Thanks so much.

Cheers,
Laurie