PHP Participant::exists方法代码示例

 public function select_group()
 {
     $group_id = $this->input->post('group_id');
     $this->_transaction_isolation();
     $this->db->trans_begin();
     $group = new Group();
     $group->get_by_id($group_id);
     if ($group->exists()) {
         $course = $group->course->get();
         if (is_null($course->groups_change_deadline) || date('U', strtotime($course->groups_change_deadline)) >= time()) {
             $student = new Student();
             $student->get_by_id($this->usermanager->get_student_id());
             if ($student->is_related_to('active_course', $course->id)) {
                 $participant = new Participant();
                 $participant->where_related($student);
                 $participant->where_related($course);
                 $participant->where('allowed', 1);
                 $participant->get();
                 if ($participant->exists()) {
                     if (!$participant->is_related_to($group)) {
                         $participant->save($group);
                         $participant->where_related($course);
                         $participant->where_related($group);
                         $participant->where('allowed', 1);
                         $participants_count = $participant->count();
                         $room = new Room();
                         $room->where_related($group)->order_by('capacity', 'asc')->limit(1)->get();
                         if ($participants_count > intval($room->capacity)) {
                             $this->db->trans_rollback();
                             $this->messages->add_message('lang:groups_message_group_is_full', Messages::MESSAGE_TYPE_ERROR);
                         } else {
                             $this->db->trans_commit();
                             $this->messages->add_message(sprintf($this->lang->line('groups_message_group_changed'), $this->lang->text($group->name)), Messages::MESSAGE_TYPE_SUCCESS);
                             $this->_action_success();
                             $this->output->set_internal_value('course_id', $participant->course_id);
                         }
                     } else {
                         $this->db->trans_rollback();
                         $this->messages->add_message('lang:groups_message_you_are_in_group', Messages::MESSAGE_TYPE_ERROR);
                     }
                 } else {
                     $this->db->trans_rollback();
                     $this->messages->add_message('lang:groups_message_cant_found_participant_record', Messages::MESSAGE_TYPE_ERROR);
                 }
             } else {
                 $this->db->trans_rollback();
                 $this->messages->add_message('lang:groups_message_cant_change_group_of_inactive_course', Messages::MESSAGE_TYPE_ERROR);
             }
         } else {
             $this->db->trans_rollback();
             $this->messages->add_message('lang:groups_message_groups_switching_disabled', Messages::MESSAGE_TYPE_ERROR);
         }
     } else {
         $this->db->trans_rollback();
         $this->messages->add_message('lang:groups_message_group_not_found', Messages::MESSAGE_TYPE_ERROR);
     }
     redirect(create_internal_url('groups'));
 }

 public function import_single_line()
 {
     $this->output->set_content_type('application/json');
     $firstname = $this->input->post('firstname');
     $lastname = $this->input->post('lastname');
     $fullname = $this->input->post('fullname');
     $email = $this->input->post('email');
     $options = $this->input->post('options');
     $this->parser->assign('firstname', $firstname);
     $this->parser->assign('lastname', $lastname);
     $this->parser->assign('fullname', $fullname);
     $this->parser->assign('email', $email);
     if ((trim($firstname) != '' && trim($lastname) != '' || trim($fullname) != '') && trim($email) != '') {
         $student_fullname = trim($fullname) != '' ? trim($fullname) : trim($firstname) . ' ' . trim($lastname);
         $this->_transaction_isolation();
         $this->db->trans_begin();
         $student = new Student();
         $student->where('email', trim($email));
         $student->get();
         if ($student->exists()) {
             if ($student->fullname != $student_fullname) {
                 $student->fullname = $student_fullname;
                 $student->save();
                 $this->db->trans_commit();
             } else {
                 $this->db->trans_rollback();
             }
             $this->parser->assign('error_message', 'lang:admin_students_csv_import_error_message_student_exists');
         } else {
             $this->load->library('form_validation');
             if ($this->form_validation->valid_email(trim($email))) {
                 $student->email = trim($email);
                 $student->fullname = $student_fullname;
                 $password = '';
                 if ($options['password_type'] == 'default') {
                     $password = $this->config->item('student_import_default_password');
                 } elseif ($options['password_type'] == 'random') {
                     $password = md5(base64_encode(rand(0, 99999999999) . time() . $student->fullname . $student->email) . $this->config->item('encryption_key'));
                     $password = substr($password, 0, rand(6, 20));
                 }
                 $student->password = $password != '' ? sha1($password) : '';
                 $student->language = $this->config->item('language');
                 if ($student->save()) {
                     $this->parser->assign('password', $password);
                     $this->db->trans_commit();
                     $this->parser->assign('success_message', 'lang:admin_students_csv_import_successfully_imported');
                     if ((bool) $options['send_mail']) {
                         if ($password == '') {
                             $this->_transaction_isolation();
                             $this->db->trans_begin();
                             $student->generate_random_password_token();
                             $this->db->trans_commit();
                         }
                         $this->_init_language_for_student($student);
                         $this->load->library('email');
                         $this->email->from_system();
                         $this->email->to($student->email);
                         $this->email->subject($this->lang->line('admin_students_csv_import_email_subject'));
                         $this->email->build_message_body('file:emails/backend/students/csv_import_email.tpl', array('student' => $student, 'password' => $password));
                         $sent = $this->email->send();
                         $this->_init_language_for_teacher();
                         if ($sent) {
                             $this->parser->assign('email_success_message', 'lang:admin_students_csv_import_email_sent_successfully');
                         } else {
                             $this->parser->assign('email_error_message', 'lang:admin_students_csv_import_email_sent_failed');
                         }
                     }
                 } else {
                     $this->db->trans_rollback();
                     $this->parser->assign('error_message', 'lang:admin_students_csv_import_error_message_student_save_error');
                 }
             } else {
                 $this->db->trans_rollback();
                 $this->parser->assign('error_message', 'lang:admin_students_csv_import_error_message_student_email_invalid');
             }
         }
         if ($student->exists()) {
             $this->parser->assign('student_id', $student->id);
             if (intval($options['assign_to_course']) > 0) {
                 $this->_transaction_isolation();
                 $this->db->trans_begin();
                 $course = new Course();
                 $course->get_by_id(intval($options['assign_to_course']));
                 if ($course->exists()) {
                     $participant = new Participant();
                     $participant->where_related('student', 'id', $student->id);
                     $participant->where_related('course', 'id', $course->id);
                     $participant->get();
                     if (!$participant->exists()) {
                         $participant->allowed = 0;
                         if ($participant->save(array('student' => $student, 'course' => $course))) {
                             $this->db->trans_commit();
                             $this->parser->assign('course_assignment_success_message', 'lang:admin_students_csv_import_successfully_added_course_participation');
                             $this->db->trans_begin();
                             $course = new Course();
                             $course->get_by_id(intval($options['assign_to_course']));
                             $participant->allowed = 1;
                             $participant->save();
                             $participants = new Participant();
                             $participants->where_related($course);
//.........这里部分代码省略.........

 public function delete_participation()
 {
     $this->output->set_content_type('application/json');
     $output = array('status' => FALSE, 'message' => $this->lang->line('admin_participants_message_participant_not_found'));
     $url = $this->uri->ruri_to_assoc(3);
     $participant_id = isset($url['participant_id']) ? intval($url['participant_id']) : 0;
     if ($participant_id > 0) {
         $process_ok = TRUE;
         $this->_transaction_isolation();
         $this->db->trans_begin();
         $participant = new Participant();
         $participant->get_by_id($participant_id);
         $student = $participant->student->get();
         $course = $participant->course->get();
         if (!$participant->exists()) {
             $output['message'] = $this->lang->line('admin_participants_message_participant_not_found');
             $process_ok = FALSE;
         }
         if ($process_ok) {
             if ($participant->allowed != 0) {
                 $participant->delete();
                 if ($student->is_related_to('active_course', $course->id)) {
                     $student->delete($course, 'active_course');
                 }
                 $output['message'] = $this->lang->line('admin_participants_message_participant_deleted');
             } else {
                 $output['message'] = $this->lang->line('admin_participants_message_participant_cant_be_deleted');
                 $process_ok = FALSE;
             }
         }
         $output['status'] = $process_ok;
         if ($output['status']) {
             $this->db->trans_commit();
             $this->_action_success();
             $this->output->set_internal_value('student_id', $student->id);
         } else {
             $this->db->trans_rollback();
         }
     }
     $this->output->set_output(json_encode($output));
 }

 public function select_project($task_set_id, $task_id, $student_id)
 {
     $output = new stdClass();
     $output->message = '';
     $output->status = FALSE;
     $this->_transaction_isolation();
     $this->db->trans_begin();
     $task_set = new Task_set();
     $task_set->where('content_type', 'project');
     $task_set->get_by_id((int) $task_set_id);
     $task = new Task();
     $task->get_by_id((int) $task_id);
     $student = new Student();
     $student->get_by_id((int) $student_id);
     $course = new Course();
     $course->where_related_task_set($task_set);
     $course->get();
     $participant = new Participant();
     $participant->where_related_course($course);
     $participant->where_related($student);
     $participant->where('allowed', 1);
     $participant->get();
     $project_selection = new Project_selection();
     $project_selection->where_related_student($student);
     $project_selection->where_related_task_set($task_set);
     $project_selection->get();
     if ($task_set->exists() && $task->exists() && $task_set->is_related_to($task) && $student->exists() && $course->exists() && $participant->exists()) {
         if ($task_set->get_student_files_count($student->id) == 0) {
             $all_project_selections = new Project_selection();
             $all_project_selections->where_related_task_set($task_set);
             $all_project_selections->where_related_task($task);
             $currently_selected = $all_project_selections->count();
             $jf_task = $task_set->task->include_join_fields()->get_by_id($task_id);
             $maximum_selections = (int) $jf_task->join_max_projects_selections;
             if ($project_selection->exists()) {
                 if (!$project_selection->is_related_to($task)) {
                     if ($currently_selected < $maximum_selections) {
                         $project_selection->save($task);
                         $output->status = TRUE;
                         $output->message = $this->lang->line('admin_task_sets_project_selection_success');
                     } else {
                         $output->message = $this->lang->line('admin_task_sets_project_selection_no_room');
                     }
                 } else {
                     $output->message = $this->lang->line('admin_task_sets_project_selection_already_selected');
                 }
             } else {
                 if ($currently_selected < $maximum_selections) {
                     $project_selection->save(array('student' => $student, 'task_set' => $task_set, 'task' => $task));
                     $output->status = TRUE;
                     $output->message = $this->lang->line('admin_task_sets_project_selection_success');
                 } else {
                     $output->message = $this->lang->line('admin_task_sets_project_selection_no_room');
                 }
             }
         } else {
             $output->message = $this->lang->line('admin_task_sets_project_selection_already_submited_solutions');
         }
     } else {
         $output->message = $this->lang->line('admin_task_sets_project_selection_cant_find_data');
     }
     if ($output->status) {
         $this->db->trans_commit();
         $this->_action_success();
     } else {
         $this->db->trans_rollback();
     }
     $this->output->set_content_type('application/json');
     $this->output->set_output(json_encode($output));
 }