You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.8 KiB
65 lines
1.8 KiB
1 year ago
|
---
|
||
|
|
title: 模型元数据
|
||
|
|
---
|
||
|
|
|
||
|
|
在 [元数据表单定义](../annotations-form.md) 我们介绍了如何为模型添加元数据表单，此文档将介绍如何在主题模板中使用元数据。
|
||
|
|
|
||
|
|
我们在模板中专门为获取 annotations 数据提供了三个方法，可以更加方便的设置默认值和判断元数据字段是否存在。
|
||
|
|
|
||
|
|
## #annotations.get(extension,key)
|
||
|
|
|
||
|
|
### 描述
|
||
|
|
|
||
|
|
根据对象和元数据的 key 获取元数据的值。
|
||
|
|
|
||
|
|
### 示例
|
||
|
|
|
||
|
|
```html {4}
|
||
|
|
<div th:with="menu = ${menuFinder.getPrimary()}">
|
||
|
|
<ul th:with="menuItems = ${menu.menuItems}">
|
||
|
|
<li th:each="menuItem : ${menuItems}">
|
||
|
|
<i th:class="${#annotations.get(menuItem, 'icon')}"></i>
|
||
|
|
<a th:href="@{${menuItem.status.href}}" th:text="${menuItem.status.displayName}"></a>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
```
|
||
|
|
|
||
|
|
## #annotations.getOrDefault(extension,key,defaultValue)
|
||
|
|
|
||
|
|
### 描述
|
||
|
|
|
||
|
|
根据对象和元数据的 key 获取元数据的值，同时支持设置默认值。
|
||
|
|
|
||
|
|
### 示例
|
||
|
|
|
||
|
|
```html {4}
|
||
|
|
<div th:with="menu = ${menuFinder.getPrimary()}">
|
||
|
|
<ul th:with="menuItems = ${menu.menuItems}">
|
||
|
|
<li th:each="menuItem : ${menuItems}">
|
||
|
|
<i th:class="${#annotations.getOrDefault(menuItem, 'icon', 'fa')}"></i>
|
||
|
|
<a th:href="@{${menuItem.status.href}}" th:text="${menuItem.status.displayName}"></a>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
```
|
||
|
|
|
||
|
|
## #annotations.contains(extension,key)
|
||
|
|
|
||
|
|
### 描述
|
||
|
|
|
||
|
|
根据对象和元数据的 key 判断元数据是否存在。
|
||
|
|
|
||
|
|
### 示例
|
||
|
|
|
||
|
|
```html {4}
|
||
|
|
<div th:with="menu = ${menuFinder.getPrimary()}">
|
||
|
|
<ul th:with="menuItems = ${menu.menuItems}">
|
||
|
|
<li th:each="menuItem : ${menuItems}">
|
||
|
|
<i th:if="${#annotations.contains(menuItem, 'icon')}" th:class="${#annotations.get(menuItem, 'icon')}"></i>
|
||
|
|
<a th:href="@{${menuItem.status.href}}" th:text="${menuItem.status.displayName}"></a>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
```
|