Removed unwanted behaviour of checking a discipline's existence

~dev_rating/application/classes/Controller/Handler/Map.php

@@ -107,13 +107,6 @@ class Controller_Handler_Map extends Controller_Handler {
                         -> rule('GradeID', 'digit');
 
 			if($this->post->check()) {
-                if (Model_Discipline::exists($this->user['TeacherID'], $this->post['SubjectID'], $this->post['GradeID'])) {
-                    //throw HTTP_Exception::factory(403, "Дисциплина с таким курсом уже существует");
-                    $data = ['success' => false, 'code' => 1];
-                    $this->response->body(json_encode($data));
-                    return;
-                }
-
 				$result = Model_Discipline::changeGrade(
                     $this->post['DisciplineID'],
 					$this->user['TeacherID'],

~dev_rating/application/classes/Model/Discipline.php

@@ -142,24 +142,6 @@ class Model_Discipline extends Model implements JsonSerializable
         return DB::query(Database::SELECT, $sql)->execute();
     }
 
-    /**
-     * Check, whether discipline already exists.
-     *
-     * @param $teacher int teacher id
-     * @param $subject int subject id
-     * @param $grade int grade num (1-7)
-     * @return true, if exists
-     */
-    public static function exists($teacher, $subject, $grade) {
-        $disciplines = Model_Disciplines::ofTeacher($teacher);
-        foreach ($disciplines as $d) {
-            if ($subject == $d['SubjectID'] && $grade == $d['GradeNum'])
-                return true;
-        }
-        return false;
-    }
-
-
     /**
      * @param $teacherID int
      * @param $disciplineID int