function testCmp()
 {
     $pfs = Notebook_Page_Field::getAllFromDb([], $this->DB);
     usort($pfs, 'Notebook_Page_Field::cmp');
     $this->assertEqual(1204, $pfs[0]->notebook_page_field_id);
     $this->assertEqual(1201, $pfs[1]->notebook_page_field_id);
     $this->assertEqual(1202, $pfs[2]->notebook_page_field_id);
     $this->assertEqual(1203, $pfs[3]->notebook_page_field_id);
     $this->assertEqual(1205, $pfs[4]->notebook_page_field_id);
 }
 public function loadPageFields()
 {
     $this->page_fields = Notebook_Page_Field::getAllFromDb(['notebook_page_id' => $this->notebook_page_id, 'flag_delete' => FALSE], $this->dbConnection);
     usort($this->page_fields, 'Notebook_Page_Field::cmp');
 }