fix bug

app/controllers/zips_controller.rb

@@ -52,15 +52,16 @@ class ZipsController < ApplicationController
           @ex_users =  default_ex_users   #仅导出已提交的，截止后则是全部为提交的。
           #可以分班选择
           if group_id.present?
-            exercise_students = @course.students.course_find_by_ids("course_group_id",group_id)  # 试卷所分班的全部人数
+            exercise_students = @course.students.where(course_group_id: group_id)  # 试卷所分班的全部人数
-            user_ids = exercise_students.pluck(:user_id).reject(&:blank?)
+            user_ids = exercise_students.pluck(:user_id).reject(&:blank?).uniq
-            @ex_users = @ex_users.exercise_commit_users(user_ids)
+            logger.info("+++++++##################_________________user_ids_____________#########{user_ids}")
+            @ex_users = @ex_users.where(user_id: user_ids)
           end
           # @ex_users = @ex_users.first(200)
           if default_ex_users_size == 0
             normal_status(-1,"导出失败,暂时没有已提交的学生")
-          elsif default_ex_users_size > 200
+          elsif default_ex_users_size > 100
-            normal_status(-1,"导出数量超过200,请分班导出或联系网站管理员导出")
+            normal_status(-1,"导出数量超过100,请分班导出或联系网站管理员导出")
           end
         end
       rescue Exception => e