来自底部的$ Pos<%loop DataObjects%>

时间:2012-12-31 00:36:46

标签: silverstripe

可以在模板中的一个循环中通过DataObject以某种方式告诉你是否在$ Pos 24但从底部开始计算 - 类似于:

<% if Pos = "-24" %>do stuff<% end_if %>
or like
<% if TotalItems - 24 = Pos %>do stuff<% end_if %>
or like
<% if Last(24) %>do stuff<% end_if %>

1 个答案:

答案 0 :(得分:4)

在Silverstripe 3中,能够做到:

<% if FromBottom(24) %>
  Hello
<% end_if %>

您必须使用以下内容将MyCustomIteratorFunctions.php添加到/ code文件夹中:

<?php
class MyCustomIteratorFunctions implements TemplateIteratorProvider
{

  protected $iteratorPos;
  protected $iteratorTotalItems;

  public static function get_template_iterator_variables()
  {
    return array('FromBottom');
  }

  public function iteratorProperties($pos, $totalItems)
  {
    $this->iteratorPos = $pos;
    $this->iteratorTotalItems = $totalItems;
  }

  function FromBottom($num)
  {
    return (($this->iteratorTotalItems - $this->iteratorPos) == $num);
  }
}

如此处所示:https://groups.google.com/forum/#!msg/silverstripe-dev/DVBtzkblZqA/PWxanKGKDYIJ