我在胡子样式模板中迭代每个模型实例,并且想要一个干净的方式来显示没有可用实例的消息(例如,如果有人删除/销毁它们)
{{#notifications}}
<div class='tertiary'>
<li>Sent {{& displayFrequency frequency}} <br> to <br> <span class='strong'>{{recipients}}</span></li>
<div id='action-buttons' {{data "notification"}}>
<span class='notification-option'><button class='edit'>edit details</button></span>
<span class='notification-option'><button class='delete'>delete</button></span>
<span class='notification-option'>
<input class="is-active" type="checkbox" {{#if active}}checked{{/if}}>
</span>
</div>
</div>
<br><br>
{{/notifications}}
首先想到的是:
{{#if notifications.length}}
{{#notifications}}
<div class='tertiary'>
<li>Sent {{& displayFrequency frequency}} <br> to <br> <span class='strong'>{{recipients}}</span></li>
<div id='action-buttons' {{data "notification"}}>
<span class='notification-option'><button class='edit'>edit details</button></span>
<span class='notification-option'><button class='delete'>delete</button></span>
<span class='notification-option'>
<input class="is-active" type="checkbox" {{#if active}}checked{{/if}}>
</span>
</div>
</div>
<br><br>
{{/notifications}}
{{else}}
<div>No Notifications</div>
{{/if}}
有更好的方法吗?在canjs的背景下有更多惯用的方法吗?
答案 0 :(得分:1)
您也可以使用#unless标签来避免嵌套:
{{#each notifications}}
{{/each}}
{{#unless notifications.length}}
{{/unless}}