PHP Teacher::exists方法代码示例

 /**
  * This method will return data by filter name.
  * If the second and third parameters are set, it will check teacher data for his prefered course and
  * inject this value into filter by specified conditions, only if these filter data are empty.
  * @param string $filter_name name of filter.
  * @param integer|Teacher $teacher teacher id or teacher object.
  * @param string $course_field field in filter which contain course id in filter.
  * @return array<midex> filter data.
  */
 public function restore_filter($filter_name, $teacher = NULL, $course_field = NULL)
 {
     $filters = $this->CI->session->userdata(self::FILTERS_ARRAY);
     $filters = empty($filters) || is_null($filters) || !is_array($filters) ? array() : $filters;
     $filter = array_key_exists($filter_name, $filters) ? $filters[$filter_name] : array();
     if (!is_null($teacher) && !is_null($course_field) && is_string($course_field) && empty($filter)) {
         if (!is_object($teacher) || !$teacher instanceof Teacher) {
             $teacher_id = $teacher;
             $teacher = new Teacher();
             $teacher->get_by_id(intval($teacher_id));
         }
         if ($teacher->exists()) {
             $filter[$course_field] = $teacher->prefered_course_id;
         }
     }
     return $filter;
 }

 /**
  * Sends message to all students or teachers. Do not use get_iterated() to execute select query!
  * @param Student|Teacher $recipients list of students or teachers.
  * @param string $subject email subject (accepts lang: prefix).
  * @param string $template template body or file:path/to/template.tpl.
  * @param string $template_variables array of template variables.
  * @param string $from email addres of sender or NULL to use system address.
  * @param string $from_name name of sender.
  * @param boolean $sender_copy enable sending of copy to sender email address.
  * @param string $sender_email sender email address.
  * @return boolean TRUE, if all emails are sent, or FALSE if all or some emails failed to be send.
  */
 protected function _send_multiple_emails($recipients, $subject, $template, $template_variables = array(), $from = NULL, $from_name = '', $sender_copy = FALSE, $sender_email = '')
 {
     if ($recipients instanceof Teacher || $recipients instanceof Student) {
         $email_by_languages = array();
         if ($recipients->exists()) {
             foreach ($recipients->all as $recipient) {
                 $email_by_languages[$recipient->language][] = $recipient;
             }
         }
         if (count($email_by_languages) == 0) {
             return FALSE;
         }
         $this->load->library('email');
         if (is_null($from)) {
             $this->email->from_system();
             $this->email->reply_to_system();
         } else {
             $this->email->from($from, $from_name);
             $this->email->reply_to($from, $from_name);
         }
         $result = TRUE;
         $lang_clone = clone $this->lang;
         set_time_limit(0);
         foreach ($email_by_languages as $language => $subrecipients) {
             if (count($subrecipients) == 0) {
                 continue;
             }
             $this->_init_specific_language($language);
             $this->email->build_message_body($template, $template_variables);
             $email_subject = 'LIST' . ($subject ? ' - ' . $this->lang->text($subject) : '');
             if ($this->config->item('email_multirecipient_batch_mode')) {
                 $to_list = array();
                 foreach ($subrecipients as $recipient) {
                     $to_list[] = $recipient->email;
                 }
                 if ($sender_copy === TRUE) {
                     $to_list[] = $sender_email;
                 }
                 $this->email->to($to_list);
                 $this->email->subject($email_subject);
                 $partial_result = $this->email->send();
                 $result = $result && $partial_result;
             } else {
                 foreach ($subrecipients as $recipient) {
                     $this->email->to($recipient->email);
                     $this->email->subject($email_subject);
                     $partial_result = $this->email->send();
                     $result = $result && $partial_result;
                 }
                 if ($sender_copy === TRUE) {
                     $this->email->to($sender_email);
                     $this->email->subject($email_subject);
                     $partial_result = $this->email->send();
                     $result = $result && $partial_result;
                 }
             }
         }
         $this->lang = $lang_clone;
         set_time_limit((int) ini_get('max_execution_time'));
         return $result;
     } else {
         return FALSE;
     }
 }

 /**
  * Reloads teacher data from database to session.
  */
 public function refresh_teacher_userdata()
 {
     if ($this->is_teacher_session_valid()) {
         $userdata = $this->CI->session->userdata(SESSION_AUTH_LOGIN_TEACHER);
         $teacher = new Teacher();
         $teacher->get_by_id(@$userdata['id']);
         if ($teacher->exists()) {
             $userdata = $teacher->to_array();
             unset($userdata['password']);
             unset($userdata['created']);
             unset($userdata['updated']);
             $this->CI->session->set_userdata(SESSION_AUTH_LOGIN_TEACHER, $userdata);
         }
     }
 }

 public function comments_subscribe($task_set_id)
 {
     $output = new stdClass();
     $this->_transaction_isolation();
     $this->db->trans_begin();
     $task_set = new Task_set();
     $task_set->get_by_id(intval($task_set_id));
     $teacher = new Teacher();
     $teacher->get_by_id($this->usermanager->get_teacher_id());
     if ($teacher->exists() && $task_set->exists() && $teacher->save(array('comment_subscription' => $task_set))) {
         $this->db->trans_commit();
         $output->message = $this->lang->line('admin_task_sets_comments_my_settings_subscribe_success');
         $output->result = TRUE;
     } else {
         $this->db->trans_rollback();
         $output->message = $this->lang->line('admin_task_sets_comments_my_settings_subscribe_error');
         $output->result = FALSE;
     }
     $this->output->set_content_type('application/json');
     $this->output->set_output(json_encode($output));
 }

 public function switch_prefered_course($course_id, $current_url)
 {
     $this->usermanager->teacher_login_protected_redirect();
     $this->_transaction_isolation();
     $this->db->trans_begin();
     $teacher = new Teacher();
     $teacher->get_by_id($this->usermanager->get_teacher_id());
     if ($teacher->exists()) {
         $course = new Course();
         $course->get_by_id($course_id);
         if ($teacher->save(array('prefered_course' => $course))) {
             $this->db->trans_commit();
             $this->usermanager->refresh_teacher_userdata();
             $this->messages->add_message('lang:admin_teachers_prefered_course_quickchange_success', Messages::MESSAGE_TYPE_DEFAULT);
             $this->load->library('filter');
             $this->filter->set_all_filters_course($teacher->prefered_course_id);
         } else {
             $this->db->trans_rollback();
             $this->messages->add_message('lang:admin_teachers_prefered_course_quickchange_failed', Messages::MESSAGE_TYPE_ERROR);
         }
     } else {
         $this->db->trans_rollback();
         $this->messages->add_message('lang:admin_teachers_prefered_course_quickchange_failed', Messages::MESSAGE_TYPE_ERROR);
     }
     redirect(decode_from_url($current_url));
 }