添加附件时记录日志

public function AddLogEntryOnAttachment(Combodo\iTop\Service\Events\EventData $oEventData)
{
    // 获取日志，返回的对象是 ormCaselog，即一个对象
    $oLog = $this->Get('public_log');
    // 从事件中获取 Attachment 对象
    $oAttachment = $oEventData->Get('attachment');
    // 从 Attachment 获取 ormDocument
    $oDocument = $oAttachment->Get('contents');  
 
    // 测试哪个"事件"触发了回调
    if ($oEventData->GetEvent() == EVENT_ADD_ATTACHMENT_TO_OBJECT)
        // 添加一条日志条目，包含附件文件名
        $oLog->AddLogEntry('Add an attachment: '.$oDocument->GetFileName());
    else
        $oLog->AddLogEntry('Removed attachment: '.$oDocument->GetFileName());
    // 将修改后的日志设置回当前 UserRequest
    $this->Set('public_log', $oLog);
    $this->DBUpdate();
}

<class id="UserRequest" _delta="must_exist">
  <event_listeners>
    <event_listener id="AddLogEntryOnAttachment" _delta="define">
      <event>EVENT_ADD_ATTACHMENT_TO_OBJECT</event>
      <callback>AddLogEntryOnAttachment</callback>
      <rank>0</rank>
    </event_listener>
    <event_listener id="AddLogEntryOnAttachmentRemoval" _delta="define">
      <event>EVENT_REMOVE_ATTACHMENT_FROM_OBJECT</event>
      <callback>AddLogEntryOnAttachment</callback>
      <rank>0</rank>
    </event_listener>
  </event_listeners>
</class>

<?xml version="1.0" encoding="UTF-8"?>
<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="3.1">
  <classes>
    <class id="UserRequest">
      <event_listeners>
        <event_listener id="AddLogEntryOnAttachment" _delta="define">
          <event>EVENT_ADD_ATTACHMENT_TO_OBJECT</event>
          <callback>AddLogEntryOnAttachment</callback>
          <rank>0</rank>
        </event_listener>
        <event_listener id="AddLogEntryOnAttachmentRemoval" _delta="define">
          <event>EVENT_REMOVE_ATTACHMENT_FROM_OBJECT</event>
          <callback>AddLogEntryOnAttachment</callback>
          <rank>0</rank>
        </event_listener>
      </event_listeners>
      <methods>
        <method id="AddLogEntryOnAttachment" _delta="define">
          <static>false</static>
          <access>public</access>
          <type>EventListener</type>
          <code><![CDATA[    public function AddLogEntryOnAttachment(Combodo\iTop\Service\Events\EventData $oEventData) { blablabla... }  ]]>
          </code>
        </method>
      </methods>
    </class>
  </classes>
</itop_design>