Silverstripe-显示父类别和子类别中的产品

当我尝试循环父类别及其子类别中的所有产品时，我遇到了问题

我创建了两种额外的页面类型：

产品类别

产品

在

SiteTree

（页面）中，我创建了结构：

 |-Pages
    |- Dental equipment (productCategory)
           |----- Sub category (productCategory)
                      |----- Sub sub category (productCategory)
                                    |----- Sub sub sub category (productCategory)
                                           |----- Product 1 (product type)
                                           |----- Product 2 (product type)
                                           |----- Product 3 (product type)
                                           |----- Product 4 (product type)

现在在

ProductCategory\u Controller

中，我创建了一个方法来循环所有不工作的产品

 public function Products()
    {

        $products = Product::get()->filter([
            'ParentID' => $this->ID
        ]);

        return  $products;
    }

---

我的问题是如何获取属于所有parenet和子类别的所有产品？

如果您试图获取当前类别页面和所有父类别页面的产品，那么下面的示例代码可能会为您指明正确的方向

如果我误解了你的问题，请评论，我会更新我的答案

<?php

namespace {
    class ProductCategoryPageController extends PageController
    {
        public function ProductsInCurrentPageTree()
        {
            $currentPage = $this->data();
            $parentPage = $currentPage->getParent();
            if (!$parentPage) {
                // No parent page, return the current page products
                return ProductPage::get()->filter('ParentID', $currentPage->ID);
            }

            $pageTreeIds = [
                $currentPage->ID,
                $parentPage->ID,
            ];

            while ($parentPage = $parentPage->getParent()) {
                // Any conditions to break out of the loop, for instance, if your category/product pages does not start from the root level
                if (!$parentPage instanceof ProductCategoryPage) {
                    break;
                }
                $pageTreeIds[] = $parentPage->ID;
            }
            
            return ProductPage::get()->filterAny(['ParentID' => $pageTreeIds]);
        }
    }
}

---

递归地为子类别页面调用相同的函数，但如果没有子类别页面，则将产品添加到数组列表中。未经测试的代码，但应足够清晰：

class ProductCategoryPageController extends PageController {

    public function ProductsRecursive($iParentID,$productList) {
        $productCategoryPages = ProductCategoryPage::get()->filter(['ParentID' => $iParentID]);
        if ($productCategoryPages) {
            //assuming product category pages only have children and no products themselves
            foreach ($productCategoryPages as $productCategoryPage) 
                $productList = $this->ProductsRecursive($productCategoryPage->ID,$productList);
        }
        else {
            //assuming you only are collecting product pages that have no children
            foreach (ProductPage::get()->filter(['ParentID' => $iParentID]) as $productPage)
                $productList->push($productPage);
        }
        return $productList;
    }

    public function Products() {
        return $this->ProductsRecursive($this->ID, ArrayList::create());
    }
}