问卷/试卷的列表页，预览页面及统计结果页面的优化

app/controllers/exercises_controller.rb

@@ -101,7 +101,7 @@ class ExercisesController < ApplicationController
           @page  = params[:page]  || 1
           @limit = params[:limit] || 15
           @exercises = @exercises.page(@page).per(@limit)
-          @exercises = @exercises.includes(:exercise_users,:exercise_questions,:exercise_group_settings)
+          @exercises = @exercises&.includes(:exercise_users,:exercise_questions,:exercise_group_settings)
         else
           @exercises = []
         end
@@ -188,7 +188,7 @@ class ExercisesController < ApplicationController
         else
           @is_teacher_or = 0  #为学生
         end
-        @exercise_questions = @exercise.exercise_questions.order("question_number ASC")
+        @exercise_questions = @exercise.exercise_questions&.includes(:exercise_choices,:exercise_shixun_challenges,:exercise_standard_answers).order("question_number ASC")
       rescue Exception => e
         uid_logger_error(e.message)
         tip_exception("试卷创建失败！")

app/controllers/polls_controller.rb

@@ -90,7 +90,7 @@ class PollsController < ApplicationController
           @limit = params[:limit] || 15
 
           @polls = @polls.page(@page).per(@limit)
-          @polls = @polls.includes(:poll_users,:poll_questions,:poll_group_settings)
+          @polls = @polls&.includes(:poll_users,:poll_questions,:poll_group_settings)
 
         else
           @polls = []
@@ -183,7 +183,7 @@ class PollsController < ApplicationController
         else
           @is_teacher_or = 0
         end
-        @poll_questions = @poll.poll_questions.order("question_number ASC")
+        @poll_questions = @poll.poll_questions&.includes(:poll_answers).order("question_number ASC")
       rescue Exception => e
         uid_logger_error(e.message)
         tip_exception("没有权限")
@@ -1148,7 +1148,7 @@ class PollsController < ApplicationController
   end
 
   def get_questions_count
-    @poll_questions = @poll.poll_questions.order("question_number ASC")
+    @poll_questions = @poll.poll_questions&.includes(:poll_answers,:poll_votes).order("question_number ASC")
     @poll_questions_count = @poll_questions.count # 全部的题目数
     @poll_question_singles = @poll_questions.ques_count(1).all.count # 单选题
     @poll_question_doubles = @poll_questions.ques_count(2).all.count # 多选题