[PHP]Zend baza danych join Opcje

[cykcykacz]

Witam,
mam dwie tabele:
articles:
i_id,
i_name,
i_text

druga tabela:
users
id,
username,
password,
first_name,
last_name,
role

Robięto w ten sposób:
Model:

[PHP] pobierz, plaintext 
<?php
class Model_Select extends Zend_Db_Table_Abstract
{
	protected $_name = 'articles';
	protected $_primary = 'i_id';
 
	public function join()
	{
		$select = $this->select()
						->from(array('a' => 'articles'),
                    array('i_id','i_name'))
            ->join(array('u' => 'users'),
                    'a.i_id = u.id',
                    array('username') );
 
		return $this->fetchAll($select);
	}
 
 
}
[PHP] pobierz, plaintext 

kotroler

[PHP] pobierz, plaintext 
    public function joinAction()
    {
        // action body
        $modelselect = new Model_Select();
        //$modelselect->setIntegrityCheck(false);
		$this->view->select = $modelselect->join();
    }
[PHP] pobierz, plaintext 

widok

Kod

    <?php foreach($this->select as $row): ?>
            <table class="table1">
        <tr><td colspan="2" class="title"><strong class="red">ID:</strong><?php echo $row->i_id ?></td></tr>
            <tr><td><strong class="blue">Tytuł:</strong></td><td><?php echo $row->i_name ?></td></tr>
    </table>
    <?php endforeach ?>

Dostaję taki komunikat błędu:

Kod

Exception information:

Message: Select query cannot join with another table