Hi I get the following error when rebuilding the database in tutorial 2 after adding the db fields in the ArticlePage.php class

Building Database
Creating database tables

PageComment
SiteTree
Email_BounceRecord
QueuedEmail
File
Group
LoginAttempt
Member
MemberPassword
Permission
Widget
WidgetArea
Page
GhostPage
ArticleHolder
ArticlePage
Table ArticlePage: created
[Notice] Undefined index: ArticlePage
GET /silverstripe/dev/build?flush=1
Line 352 in C:\wamp\www\SilverStripe\sapphire\core\model\Database.php

Source
343
344       if(!$newTable && !isset($this->fieldList[$table])) {
345          $this->fieldList[$table] = $this->fieldList($table);
346       }
347       
348       if(is_array($spec))
349          $specValue=$spec['data_type'];
350       else $specValue=$spec;
351       
352       if(is_array($this->fieldList[$table][$field]))
353          $fieldValue=$this->fieldList[$table][$field]['data_type'];
354       else $fieldValue=$this->fieldList[$table][$field];
355
356       if(is_array($spec_orig))
357          $spec_orig=DB::getConn()->$spec_orig['type']($spec_orig['parts']);
358       
Trace

Notice: Undefined offset: 0 in C:\wamp\www\SilverStripe\sapphire\dev\Debug.php on line 520

Warning: Invalid argument supplied for foreach() in C:\wamp\www\SilverStripe\sapphire\dev\Debug.php on line 557

Warning: Invalid argument supplied for foreach() in C:\wamp\www\SilverStripe\sapphire\dev\Debug.php on line 557

Warning: Invalid argument supplied for foreach() in C:\wamp\www\SilverStripe\sapphire\dev\Debug.php on line 557

Warning: Invalid argument supplied for foreach() in C:\wamp\www\SilverStripe\sapphire\dev\Debug.php on line 557

Warning: Invalid argument supplied for foreach() in C:\wamp\www\SilverStripe\sapphire\dev\Debug.php on line 557

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Line I of I
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Line i of i

iii()
Line i of i
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Line i of i

If I comment out the entries for db
<?php
/**
* Defines the ArticlePage page type
*/
class ArticlePage extends Page {
static $db = array(
/* 'Date' => 'Date',
'Author' => 'Text'*/
);
static $has_one = array(
);

function getCMSFields() {
$fields = parent::getCMSFields();

$fields->addFieldToTab('Root.Content.Main', new CalendarDateField('Date'), 'Content');
$fields->addFieldToTab('Root.Content.Main', new TextField('Author'), 'Content');
   
return $fields;
}
}

class ArticlePage_Controller extends Page_Controller {

}

?>

Then the error goes away. I'm using the latest svn trunk (http://svn.silverstripe.com/open/phpinstaller/trunk) and wamp on windows xp.
Any ideas as to what's causing this?

Regards,
Martin.

It's to highlight where I suspect the error is. When the lines are uncommented (as per the tutorial) I get the 'Undefined Index' error, if I comment them out the error goes away. I expect the reason it goes away is that as there are no database fields, it doesn't actually create the ArticlePage table.
Is there any way of debugging the problem?

I'm also getting this kind of error when trying to build my own data objects. I'm using svn trunk.