演练登记 没有附件时 不显示 演练文件

src/views/menu/rehearsalTask/components/addRehearsalTask.vue

@@ -69,7 +69,7 @@
         placeholder="请填写演练地点"
       />
       <!-- 演练文件 -->
-      <div class="mainItem mainItemData" v-if="studyList">
+      <div class="mainItem mainItemData" v-if="studyList&&studyList.length>0">
         <p class="label labelPeople">演练文件</p>
         <div>
           <div v-for="item in studyList" :key="item.name">