课堂统计功能

app/controllers/colleges_controller.rb

@@ -127,27 +127,37 @@ class CollegesController < ApplicationController
 
   # 在线课堂
   def course_statistics
-    courses = Course.where(school_id: @school.id, is_delete: 0)
-
-    @obj_count = courses.count
-
-    courses = courses.joins(shixun_homework_commons: :student_works)
-                .joins('join games on games.myshixun_id = student_works.myshixun_id')
-                .select('courses.id, courses.name, courses.is_end, sum(games.evaluate_count) evaluating_count')
-                .group('courses.id').order('is_end asc, evaluating_count desc')
-
-    @obj_pages = Paginator.new @obj_count, 8, params['page']
-    @courses = courses.limit(@obj_pages.per_page).offset(@obj_pages.offset)
-
-    course_ids = @courses.map(&:id)
-    @student_count     = StudentsForCourse.where(course_id: course_ids).group(:course_id).count
-    @shixun_work_count = HomeworkCommon.where(homework_type: 4, course_id: course_ids).group(:course_id).count
-    @attachment_count  = Attachment.where(container_id: course_ids, container_type: 'Course').group(:container_id).count
-    @message_count     = Message.joins(:board).where(boards: { parent_id: 0, course_id: course_ids }).group('boards.course_id').count
-    @active_time       = CourseActivity.where(course_id: course_ids).group(:course_id).maximum(:created_at)
-    @exercise_count    = Exercise.where(course_id: course_ids).group(:course_id).count
-    @poll_count        = Poll.where(course_id: course_ids).group(:course_id).count
-    @other_work_count  = HomeworkCommon.where(homework_type: [1,3], course_id: course_ids).group(:course_id).count
+    @courses = Course.find_by_sql("SELECT c.id, (select concat(lastname,firstname) from users u where u.id=c.tea_id) as username,
+               (select count(sfc.id) from students_for_courses sfc where c.id=sfc.course_id group by c.id) as student_count,
+               (select count(hc.id) from homework_commons hc where c.id=hc.course_id and hc.homework_type=4 group by c.id) as hcm_count,
+               (select count(hc.id) from homework_commons hc where c.id=hc.course_id and hc.homework_type in (1,3) group by c.id) as hcm_nonshixun_count,
+               (select count(e.id) from exercises e where c.id=e.course_id group by c.id) as exercises_count,
+               (select count(p.id) from polls p where c.id=p.course_id group by c.id) as polls_count,
+               (select count(a.id) from attachments a where c.id=a.container_id and a.container_type='Course' group by c.id) as attachments_count,
+               (select count(m.id) from messages m inner join boards b on  b.id=m.board_id and b.parent_id=0 where b.course_id=c.id group by c.id) as messages_count,
+               c.tea_id, c.name, c.is_end,
+               (SELECT MAX(created_at) FROM `course_activities` ca WHERE ca.course_id = c.id) AS update_time
+               FROM `courses` c WHERE c.school_id = #{@school.id} and c.is_delete = 0")
+
+    @courses.each do |course|
+      course[:evaluating_count] = Output.find_by_sql("select sum(g.evaluate_count) as evaluating_count from games g inner join
+                                  (select myshixun_id from student_works sw inner join homework_commons hc on sw.homework_common_id=hc.id and
+                                  sw.myshixun_id !=0 and hc.course_id=#{course.id} and homework_type=4) aa on g.myshixun_id=aa.myshixun_id").first.try(:evaluating_count).to_i
+      course[:task_count] = course.hcm_count.to_i + course.attachments_count.to_i + course.messages_count.to_i + course.hcm_nonshixun_count.to_i + course.exercises_count.to_i + course.polls_count.to_i
+    end
+    @courses = @courses.sort{|x,y| [y[:evaluating_count], y[:task_count]] <=> [x[:evaluating_count], x[:task_count]] }
+    @courses = @courses.sort_by { |course| course.is_end ? 1 : 0 }
+
+    # SELECT c.id, (select concat(firstname,lastname) from users u where u.id=c.tea_id) as username,
+    #                                                                                      (select count(sfc.id) from students_for_courses sfc where c.id=sfc.course_id group by c.id) as student_count,
+    #                                                                                                                                                                                     (select count(hc.id) from homework_commons hc where c.id=hc.course_id and hc.homework_type=4 group by c.id) as hcm_count,
+    #                                                                                                                                                                                                                                                                                                    c.tea_id, c.name, c.is_end,
+    #                                                                                                                                                                                                                                                                                                    (SELECT MAX(created_at) FROM `course_activities` ca WHERE ca.course_id = c.id) AS update_time
+    # FROM `courses` c WHERE (c.school_id = 117 and c.is_delete = 0) ORDER BY update_time desc LIMIT 8 OFFSET 0
+
+    # @courses = Course.where("courses.school_id = #{@department.school_id} and courses.is_delete = 0").select("courses.id, courses.tea_id, courses.name, courses.is_end,
+    #   (SELECT MAX(created_at) FROM `course_activities` WHERE course_activities.course_id = courses.id) AS update_time").order("update_time desc")
+    @courses = paginateHelper @courses, 8
   end
 
   # 学生实训