SilverStripe添加到DataList子DataList

Question

我正在尝试使用子DataList创建一个DataList,用于模板中循环内的循环:

public function getAllCategoriesAndEntrys(){
    $categories = FitoCategory::get();

    foreach ($categories as $category) {
        $category->entries = $this->Items($category->ID);
    }

    return $categories;
}

我的模板看起来像这样:

<% loop getAllCategoriesAndEntrys() %>
    $ID $Title <br>
    <% loop entries %>
        ------ $Title <br>
    <% end_loop %>
<% end_loop %>

在我的例子中,我确信:

FitoCategory::get()- 返回对象类型中的所有'FitoCategory' DataList;

$this->Items($category->ID)- DataList按ID 返回FitoCategory的所有子条目;

我需要一个绑定代码:

$category->entries = $this->Items($category->ID);

Answer 1

目前,查询运行不会被缓存,因此FitoCategory每次循环遍历列表时都会创建新对象.这意味着任何其他属性都会丢失.

相反,您希望将对象添加到a ArrayList并返回该对象.

public function getAllCategoriesAndEntrys(){
    $categories = FitoCategory::get();
    $list = ArrayList::create();

    foreach ($categories as $category) {
        $category->entries = $this->Items($category->ID);
        $list->push($category);
    }

    return $list;
}