fix: sql view bug: rate calc

db/Views.sql

@@ -149,11 +149,15 @@ CREATE OR REPLACE VIEW `view_rating_result` AS
             SUM(rating_table.Rate*(view_roadmap.ModuleType = 'regular')) AS 'RateRegular',
             SUM(rating_table.Rate*(view_roadmap.ModuleType = 'extra')) AS 'RateExtra',
             SUM(rating_table.Rate*(view_roadmap.ModuleType = 'bonus')) AS 'RateBonus',
-            (SELECT rating_table.Rate*(view_roadmap.ModuleType = 'exam')
-             ORDER BY    view_roadmap.ModuleType = 'exam' DESC,
-                 (rating_table.Rate IS NULL) ASC,
-                 view_roadmap.SubmoduleOrderNum DESC
-             LIMIT 1
+            (SELECT rt.Rate*(vr.ModuleType = 'exam')
+                FROM rating_table AS rt
+                LEFT JOIN `view_roadmap` AS vr ON vr.SubmoduleID = rt.SubmoduleID
+                WHERE vr.DisciplineID = view_roadmap.DisciplineID AND
+                        rt.StudentID = rating_table.StudentID
+                ORDER BY vr.ModuleType = 'exam' DESC,
+                 (rt.Rate IS NULL) ASC,
+                 vr.SubmoduleOrderNum DESC
+                LIMIT 1
             ) AS 'RateExam'
         FROM `rating_table`
         LEFT JOIN `view_roadmap` ON view_roadmap.SubmoduleID = rating_table.SubmoduleID