修改《学生列表排序用的存储过程》

Signed-off-by: alan <547533434@qq.com>

db/migrate/20141229141201_create_pro_select_member_score.rb

@@ -0,0 +1,108 @@
+class CreateProSelectMemberScore < ActiveRecord::Migration
+  def up
+  	sql_delete = ("DROP PROCEDURE IF EXISTS `member_score`;")
+  	sql = ("
+CREATE PROCEDURE `member_score`(IN courseid INT, IN groupid INT,IN start_from INT, IN nums INT, IN sort_by VARCHAR(10))
+BEGIN
+
+	CREATE TEMPORARY TABLE IF NOT EXISTS course_teachers (
+           id INT
+
+         );
+         TRUNCATE TABLE course_teachers;
+
+	 CREATE TEMPORARY TABLE IF NOT EXISTS mems (
+           id INT ,
+           user_id INT,
+           course_id INT,
+					 created_on DATETIME,
+           course_group_id INT,
+					 score FLOAT DEFAULT 0
+         );
+         TRUNCATE TABLE mems;
+
+	 CREATE TEMPORARY TABLE IF NOT EXISTS mem_home (
+           id INT,
+           user_id INT,
+           course_id INT,
+					 created_on DATETIME,
+           course_group_id INT,
+					 home_id INT,
+					 score FLOAT DEFAULT 0
+         );
+         TRUNCATE TABLE mem_home;
+
+   CREATE TEMPORARY TABLE IF NOT EXISTS t_scores (
+
+           home_id INT,
+           score FLOAT
+         );
+         TRUNCATE TABLE t_scores;
+
+   CREATE TEMPORARY TABLE IF NOT EXISTS s_scores (
+
+           home_id INT,
+           score FLOAT
+         );
+         TRUNCATE TABLE s_scores;
+
+ CREATE TEMPORARY TABLE IF NOT EXISTS scores (
+
+           user_id INT,
+           score FLOAT
+         );
+         TRUNCATE TABLE scores;
+
+         INSERT INTO course_teachers (SELECT members.user_id FROM members WHERE members.user_id NOT IN (SELECT student_id FROM students_for_courses WHERE course_id = courseid));
+
+
+
+ INSERT INTO mems (id, user_id, course_id, created_on, course_group_id)
+						(SELECT members.id, members.user_id, members.course_id, members.created_on, members.course_group_id
+							FROM members WHERE course_id = courseid AND members.user_id NOT IN (SELECT id FROM course_teachers));
+
+         INSERT INTO mem_home (id, user_id, course_id, created_on, course_group_id,home_id)
+						(SELECT members.id, members.user_id, members.course_id, members.created_on, members.course_group_id, homework_attaches.id
+							FROM members, homework_attaches WHERE course_id = courseid
+						AND members.user_id = homework_attaches.user_id AND members.user_id NOT IN (SELECT id FROM course_teachers)
+					 AND homework_attaches.bid_id IN (SELECT bid_id FROM homework_for_courses WHERE course_id = courseid ));
+
+			INSERT INTO t_scores (home_id, score)	(SELECT rateable_id,AVG(seems_rateable_rates.stars)
+		FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id IN (SELECT mem_home.home_id FROM mem_home)
+		AND rater_id  IN (SELECT id FROM course_teachers)
+			 GROUP BY rateable_id);
+
+			INSERT INTO s_scores (home_id, score)	(SELECT rateable_id,AVG(seems_rateable_rates.stars)
+		FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id IN (SELECT mem_home.home_id FROM mem_home)
+			AND rater_id NOT IN (SELECT id FROM course_teachers)
+			 GROUP BY rateable_id) ;
+
+		UPDATE mem_home, t_scores SET mem_home.score = t_scores.score WHERE mem_home.home_id = t_scores.home_id ;
+
+		UPDATE mem_home, s_scores SET mem_home.score = s_scores.score WHERE mem_home.home_id = s_scores.home_id AND mem_home.score = 0;
+
+		INSERT INTO scores (user_id, score) (SELECT user_id, SUM(score) FROM mem_home GROUP BY user_id);
+		UPDATE mems, scores SET mems.score = scores.score WHERE mems.user_id = scores.user_id;
+		IF sort_by = '' OR sort_by = 'desc' THEN
+			IF groupid <> 0 THEN
+				SELECT * FROM mems WHERE course_group_id = groupid  ORDER BY score DESC ;
+			ELSE 
+				SELECT * FROM mems ORDER BY score DESC LIMIT start_from, nums;
+			END IF;
+		ELSE
+			IF groupid <> 0 THEN
+				SELECT * FROM mems WHERE course_group_id = groupid  ORDER BY score ASC ;
+			ELSE 
+				SELECT * FROM mems ORDER BY score ASC LIMIT start_from, nums;
+			END IF;
+		END IF;
+    END;
+
+")
+	execute(sql_delete)
+    execute(sql)
+  end
+
+  def down
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20141229025925) do
+ActiveRecord::Schema.define(:version => 20141229141201) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false