修改

src/views/chat/index.vue

@@ -28,7 +28,7 @@
                   :key="index"
                   @click="toView(item)"
                 >
-                  <div class="line" v-if="item.user == id"></div>
+                  <div class="line" v-if="item._id == id"></div>
                   <el-col :span="4" class="left">
                     <el-image
                       class="image"