问卷的简答题回答bug修复

app/controllers/poll_votes_controller.rb

@@ -91,6 +91,7 @@ class PollVotesController < ApplicationController
           end
         else   #主观题的输入
           # current_vote_text = user_votes.find_vote_text
+          if question_answer_text.present?
             if user_votes.present?
               user_votes.first.update_attribute("vote_text", question_answer_text)
               # if question_answer_text.present?
@@ -102,6 +103,7 @@ class PollVotesController < ApplicationController
               PollVote.create(vote_answer_params)
             end
           end
+        end
         @current_question_number = @poll_question.question_number
         @current_question_necessary = @poll_question.is_necessary
         #问答记录存在，且有值，才会有返回值。