我们这里给出一个最简单的例子，field_collection_views_handler_field_host_entity_id，这个和我们在前面实现的，简易程度差不多，都非常简单：
<?php
/**
* @file
* Contains the host_entity_id field handler.
*/
/**
* Field handler to display the host_entity_id
*/
class field_collection_views_handler_field_host_entity_id extends views_handler_field {
function query() {
// Do nothing, as this handler does not need to do anything to the query itself.
}
function option_definition() {
$options = parent::option_definition();
return $options;
}
function options_form(&$form, &$form_state) {
parent::options_form($form, $form_state);
}
/**
* Work out the host_entity_id
*/
function render($values) {
$host_entity_id = 0;
//$item_id = $this->get_value($values, 'item_id');
$item_id = $values->item_id;
//debug($values);
$field_collection_item = field_collection_item_load($item_id);
$host_entity_id = $field_collection_item->hostEntityId();
return $host_entity_id;
}
}
由于field_collection_views_handler_field_host_entity_id是一个类，所以我们需要在info文件中，注册一下这个文件，使用下面的代码：
files[] = views/field_collection_views.views.inc
files[] = views/field_collection_views_handler_field_host_entity_id.inc
files[] = views/field_collection_views_handler_field_host_entity_path.inc
files[] = views/field_collection_views_handler_field_field_path.inc
files[] = views/field_collection_views_handler_field_host_entity_type.inc