Discipline model contains method to get roadmap

~dev_rating/application/classes/Controller/Student/Subject.php

@@ -4,12 +4,9 @@ class Controller_Student_Subject extends Controller_UserEnvi {
 
     public function action_show()
     {
-        
-        // ЛОГИКА
-        $db = new Model_Student;
         $id = $this->request->param('id');
-        
-        $discipline = $db->getDisciplineMap($this->UserInfo['StudentID'], $id);
+        $student = $this->UserInfo['StudentID'];
+        $discipline = Model_Discipline::getMap($id, $student);
         $info = Model_Discipline::getInfo($id);
         
         // Информация о предмете

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

@@ -10,4 +10,15 @@ class Model_Discipline extends Model
         $sql = "CALL `GetDisciplineInfo`('$id'); ";
         return DB::query(Database::SELECT, $sql)->execute()->offsetGet(0);
     }
+
+    /**
+     * Get the disciplines's roadmap (учебная карта) for a student.
+     * @param $discipline int subject id
+     * @param $student int student id
+     * @return Database_Result select from <tt>view_roadmap</tt> table
+     */
+    public static function getMap($discipline, $student) {
+        $sql = "CALL `GetRates`('$student', '$discipline'); ";
+        return DB::query(Database::SELECT, $sql)->execute();
+    }
 }
\ No newline at end of file

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

@@ -2,9 +2,4 @@
   
 class Model_Student extends Model
 {
-    public function getDisciplineMap($student_id, $subject_id)
-    {
-        $sql = "CALL `GetRates`('$student_id', '$subject_id'); ";
-        return DB::query(Database::SELECT, $sql)->execute();
-    }
 }