/**
* 调整考试学科顺序
*
* @param int $id 学科id
* @return void
*/
public function edit_index($id = 0, $type = 'forward')
{
if (!$this->check_power('exam_manage')) {
return;
}
$exam = ExamModel::get_exam($id, 'exam_pid,exam_index');
if ($exam === false or $exam['exam_pid'] == 0) {
message('考试学科不存在');
return;
}
if ($exam['exam_index'] < 1) {
ExamModel::resort_index($exam['exam_pid']);
} else {
if ($type == 'forward') {
if ($exam['exam_index'] > 1) {
$prev_where = array('exam_pid' => $exam['exam_pid'], 'exam_index' => $exam['exam_index'] - 1);
$query = $this->db->select('exam_id')->get_where('exam', $prev_where, 1);
$prev = $query->row_array();
if ($prev) {
$this->db->update('exam', array('exam_index' => $exam['exam_index'] - 1), array('exam_id' => $id));
$this->db->update('exam', array('exam_index' => $exam['exam_index']), array('exam_id' => $prev['exam_id']));
} else {
ExamModel::resort_index($exam['exam_pid']);
}
}
} else {
$next_where = array('exam_pid' => $exam['exam_pid'], 'exam_index' => $exam['exam_index'] + 1);
$query = $this->db->select('exam_id')->get_where('exam', $next_where, 1);
$next = $query->row_array();
if ($next) {
$this->db->update('exam', array('exam_index' => $exam['exam_index'] + 1), array('exam_id' => $id));
$this->db->update('exam', array('exam_index' => $exam['exam_index']), array('exam_id' => $next['exam_id']));
}
}
}
$back_url = empty($_SERVER['HTTP_REFERER']) ? 'admin/exam/index/' : $_SERVER['HTTP_REFERER'];
redirect($back_url);
}