1

app/controllers/subjects_controller.rb

@@ -464,6 +464,9 @@ class SubjectsController < ApplicationController
         elsif params[:type] == "user_info"
           @subject.subject_user_infos
         else
+          select_sql = "count(subject_course_records.id) total, sum(course_count) course_count, sum(student_count) student_count, " +
+              "sum(choice_shixun_num) choice_shixun_num, sum(choice_shixun_frequency) choice_shixun_frequency"
+          @total = @subject.subject_course_records.select("#{select_sql}").first
           @subject.subject_course_records
         end
 

app/views/subjects/statistics_info.json.jbuilder

@@ -4,5 +4,5 @@ json.data do
   json.subject_info @subject.subject_record
   json.other_info @data
   json.total_count @data_count
- # json.total @total
+  json.total @total
 end