public function beforeSave()
 {
     if ($this->tglmasuk == '') {
         $this->tglmasuk = null;
     }
     if ($this->tgllulus == '') {
         $this->tgllulus = null;
     }
     if ($this->tgl_ijazah == '') {
         $this->tgl_ijazah = null;
     }
     return parent::beforeSave();
 }
                    <th>Jenis pendidikan</th>
                    <th>Nama pendidikan</th>
                    <th>Tgl lulus</th>
                    <th>Nama pendidikan</th>
                    <th>Jurusan</th>
                    <th>Lama pendidikan</th>
                    <th>No ijazah</th>
                    <th>IPK</th>
                    <th>Batal</th>
                </tr>
            </thead>
            <tbody>
            <?php 
$id = $_GET['id'];
$i = 1;
$modPendidikankaryawan = PendidikankaryawanR::model()->findAllByAttributes(array('karyawan_id' => $id), array('order' => 'pendidikankaryawan_nourut'));
foreach ($modPendidikankaryawan as $value) {
    $tr = '<tr class="odd">';
    $tr .= '<td>' . $value->pendidikankaryawan_nourut . '</td>';
    $tr .= '<td>' . $value->jenispendidikan . '</td>';
    $tr .= '<td>' . $value->pendidikankaryawan_nama . '</td>';
    $tr .= '<td>' . $value->tgllulus . '</td>';
    $tr .= '<td>' . $value->pendidikan_nama . '</td>';
    $tr .= '<td>' . $value->jurusan_nama . '</td>';
    $tr .= '<td>' . $value->lamapendidikan . ' tahun' . '</td>';
    $tr .= '<td>' . $value->no_ijazah . '</td>';
    $tr .= '<td>' . $value->nilai_ipk . '</td>';
    //                    $tr .= '<td>'.CHtml::link('<span class="mws-ic-16 ic-delete2"></span>','javascript:void(0);',array('onclick'=>'konfirmasi();')).'</td>';
    $tr .= '<td>' . CHtml::link('<span class="mws-ic-16 ic-delete2"></span>', 'index.php?r=' . Yii::app()->controller->module->id . '/' . Yii::app()->controller->id . '/deletePendidikan&karyawan_id=' . $id . '&id=' . $value->pendidikankaryawan_id, array('onclick' => 'return (!confirm("Anda yakin akan menghapus item ini ?")) ? false : true')) . '</td>';
    //                    $tr .= '<td>'.CHtml::link('<span class="mws-ic-16 ic-delete2"></span>','',array('onclick'=>'if (!confirm("Anda yakin akan menghapus item ini ?")) { return false; } else {return true;}', 'href'=>'')).'</td>';
    $tr .= '</tr>';
 public function actiondeletePendidikan($karyawan_id, $id)
 {
     $modPendidikankaryawan = PendidikankaryawanR::model();
     if ($modPendidikankaryawan->deleteByPK($id)) {
         $this->redirect(array('index', 'id' => $karyawan_id));
     }
 }