fix bug

src/views/system/item-role.vue

@@ -109,11 +109,12 @@
         ></el-pagination>
       </div>
       <el-dialog title :visible.sync="dialog.show" width="30%" center>
-        <p class="dialog-p">
+        <p v-if="numL3 > 1" class="dialog-p">
           确认将{{ dialog.role }}
           <span class="user-name">"{{ dialog.name }}"</span>
           {{ dialog.option }}吗?"
         </p>
+        <p v-else >该用户为此机构仅有的次级负责人，确认需要降级吗？</p>
         <span slot="footer" class="dialog-footer">
           <el-button type="default" size="small" @click="dialog.show = false">取消</el-button>
           <el-button type="primary" size="small" @click="changeRole()">确定</el-button>
@@ -189,6 +190,7 @@ export default {
         }
       ],
       numL2: 0,
+      numL3: 0,
       dialog: {
         show: false,
         role: "项目负责人",
@@ -237,6 +239,7 @@ export default {
           this.organizationList = res.data.organizationList;
           this.departmentsList = res.data.departmentsList;
           this.numL2 = res.data.numL2;
+          this.numL3 = res.data.numL3;
         }
       });
     },