fix but

app/controllers/poll_questions_controller.rb

@@ -200,19 +200,21 @@ class PollQuestionsController < ApplicationController
         if @poll.polls_status.to_i == 1
           if opr.present?
             if opr.to_s == "up"
-              last_q_p = @poll.poll_questions.last_poll(current_q_p)  #当前问题的前一个问题
+              last_q_p = @poll.poll_questions.find_by(question_number: (current_q_p-1))  #当前问题的前一个问题
               if last_q_p.present?
-                last_q_p.update_attribute("question_number", current_q_p) # 重新获取当前问题的位置
                 @poll_question.update_attribute("question_number", (current_q_p - 1))
+                last_q_p.update_attribute("question_number", current_q_p) # 重新获取当前问题的位置
+
                 normal_status(0, "问题上移成功！")
               else
                 normal_status(-1, "移动失败，已经是第一个问题了！")
               end
             elsif opr.to_s == "down"
-              next_q_p = @poll.poll_questions.next_poll(current_q_p)  #当前问题的后一个问题
+              next_q_p = @poll.poll_questions.find_by(question_number: (current_q_p+1))  #当前问题的后一个问题
               if next_q_p.present?
-                next_q_p.update_attribute("question_number", current_q_p)
                 @poll_question.update_attribute("question_number", (current_q_p + 1))
+                next_q_p.update_attribute("question_number", current_q_p)
+
                 normal_status(0, "问题下移成功！")
               else
                 normal_status(-1, "移动失败，已经是最后一个问题了！")