bug fix

src/modules/admin-subject/struct/index.vue

@@ -32,7 +32,7 @@
             </el-popconfirm>
             <el-button v-if="row.firstMain" type="primary" link @click="onEditMainQuestion(row)">大题设置</el-button>
             <el-button v-if="row.firstMain" type="primary" link @click="recovery(row)">手动回收</el-button>
-            <el-button v-if="!row.relationMainNumber" type="primary" link @click="syncTask(row)">同步任务</el-button>
+            <el-button v-if="!!row.relationMainNumber" type="primary" link @click="syncTask(row)">同步任务</el-button>
           </template>
         </base-table>
       </el-card>