updates

src/modules/exam/views/MarkingPaper.vue

@@ -50,7 +50,7 @@ export default {
       this.questionList.forEach(item => {
         const score = this.questionData.score_item[item.question_item_id]
         // 用户答案
-        const answer = this.questionData.answers ? this.questionData.answers[item.question_item_id] : {}
+        const answer = this.questionData.answers ? this.questionData.answers[item.question_item_id] || {} : {}
         item.question_list.forEach(subItem => {
           if (subItem.group_id) {
             subItem.list.forEach(it => {