过滤日期。 Cakephp返回的是数组而不是日期，这正常吗？

<?php echo $this->Form->create(\'Logs\');?>
<fieldset>
<?php
    echo $this->Form->input(\'start\',array(\'type\'=>\'date\'));
    echo $this->Form->input(\'end\',array(\'type\'=>\'date\'));
?>
</fieldset>
<?php echo $this->Form->end(\'Filter\');?>

...
$conditions[\'Logs.created BETWEEN ? AND ?\'] = array( $this->data[\'Logs\'][\'start\'],$this->data[\'Logs\'][\'end\']);
...

$this->data[\'Logs\'][\'start\']

$this->data[\'Logs\'][\'end\']

[Logs] => Array
(
    [start] => Array
        (
            [month] => 04
            [day] => 19
            [year] => 2011
        )

    [end] => Array
        (
            [month] => 04
            [day] => 19
            [year] => 2011
        )
)