增加先按总评得分然后按时间排序

app/controllers/homework_attach_controller.rb

@@ -27,10 +27,12 @@ class HomeworkAttachController < ApplicationController
   #获取已评作业列表
   def get_batch_homeworks
     teachers = find_course_teachers @course
+    teacher_proportion = get_teacher_proportion @bid
     all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT * FROM (SELECT homework_attaches.*,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id IN #{teachers} and stars IS NOT NULL) AS t_score,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id NOT IN #{teachers}) AS s_score
-            FROM homework_attaches WHERE bid_id = #{@bid.id} ORDER BY s_score DESC,created_at ASC) AS table1
+            FROM homework_attaches WHERE bid_id = #{@bid.id}
+            ORDER BY (CASE WHEN t_score IS NULL THEN 0 ELSE t_score * #{teacher_proportion} END + CASE WHEN s_score IS NULL THEN 0 ELSE s_score * #{1 - teacher_proportion} END) DESC,created_at ASC) AS table1
             WHERE table1.t_score IS NOT NULL")
     @homework_list = paginateHelper all_homework_list,10
     respond_to do |format|
@@ -41,11 +43,12 @@ class HomeworkAttachController < ApplicationController
   #获取所有作业列表
   def get_homeworks
     teachers = find_course_teachers @course
+    teacher_proportion = get_teacher_proportion @bid
     all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT homework_attaches.*,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id in #{teachers}) AS t_score,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id not in #{teachers}) AS s_score
             FROM homework_attaches WHERE bid_id = #{@bid.id}
-            ORDER BY s_score DESC,created_at ASC")
+            ORDER BY (CASE WHEN t_score IS NULL THEN 0 ELSE t_score * #{teacher_proportion} END + CASE WHEN s_score IS NULL THEN 0 ELSE s_score * #{1 - teacher_proportion} END) DESC,created_at ASC")
     @homework_list = paginateHelper all_homework_list,10
     respond_to do |format|
       format.js
@@ -393,5 +396,15 @@ class HomeworkAttachController < ApplicationController
     end
     teachers
   end
+
+  #获取作业教师评分所占比例
+  def get_teacher_proportion bid
+    if bid.proportion
+      teacher_proportion = bid.proportion * 1.0 / 100
+    else
+      teacher_proportion = 1.0
+    end
+    teacher_proportion
+  end
 end