1

app/controllers/subjects_controller.rb

@@ -464,10 +464,10 @@ class SubjectsController < ApplicationController
         elsif params[:type] == "user_info"
           @subject.subject_user_infos
         else
-          @subject.subject_course_records
-          select_sql = "count(*) total, sum(course_count) course_count, sum(student_count) student_count, " +
+          select_sql = "count(subject_course_records.*) 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
 
     @data_count = @data.count