[Typo3-german] TCA - "eval = required" for "select"

[Jonas DŸbi]

Hi

I added a select box to the "page" TCA which gets it's options from an
other table. Nothing special everything works :-)
But I need to set the field as 'required', I need this little yellow
flag if there is nothin selected. 
I already tried this:
1. Add a empty Entry within the items array (of course)
2. Set 'allowNonIdValues' => 0,
3. Set "minitems" => 1,
4. Set 'eval' => 'required', (I already knew it doesn't work -> just for
input)
Is there any possibility to set this field as required?

	"tx_xyz_author" => Array (		
		"exclude" => 1,		
		"label" => "LLL:EXT:xyz/locallang_db.php:pages.tx_xyz_author",
		"config" => Array (
			"type" => "select",	
			"items" => Array (
				Array("",""),
			),
			"foreign_table" => "tx_xyz_people",	
			"foreign_table_where" => " ORDER BY tx_xyz_people.uid",
			"size" => 1,	
			"minitems" => 1,
			'allowNonIdValues' => 0,
			"maxitems" => 1,
			'eval' => 'required',
		)
	),

Thanks.... 
Jonas

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