atk4\data\tests\JoinArrayTest::testLoadMissing PHP Method

    public function testLoadMissing()
    {
        $a = ['user' => [2 => ['id' => 2, 'name' => 'Peter', 'contact_id' => 1], 3 => ['id' => 3, 'name' => 'XX', 'contact_id' => 2], 4 => ['id' => 4, 'name' => 'YYY', 'contact_id' => 3]], 'contact' => [2 => ['id' => 2, 'contact_phone' => '+999'], 3 => ['id' => 3, 'contact_phone' => '+777']]];
        $db = new Persistence_Array($a);
        $m_u = new Model($db, 'user');
        $m_u->addField('contact_id');
        $m_u->addField('name');
        $j = $m_u->join('contact');
        $j->addField('contact_phone');
        $m_u->load(2);
    }