Question

我有一个页面类型

ProductPage

$ has_one FeatureImage

有一个虚拟页面引用了其中一个ProductPages

当我在一个循环孩子的页面中，其中一个孩子是虚拟页面时，我可以渲染除FeatureImage字段之外的所有字段。

class ProductPage extends Page
{
    private static $db = [
        'TeaserText'=>'Varchar'
    ];

    private static $has_one = [
        'LinkedProduct'=>'Product', 
        'FeatureImage'=>Image::Class
    ];
    private static $many_many = [

    ];
    private static $owns = [
       'FeatureImage'
    ];

    public function getCMSFields(){
        $fields = parent::getCMSFields();

        $featureField = UploadField::create('FeatureImage', 'Feature Image')->setFolderName('FeatureImages')->setDescription("This image appears in the category pages. 400x400px");
        $teaserField = TextField::create('TeaserText', 'Teaser Text')->setDescription("This text appears in the category pages");
        $fields->addFieldToTab('Root.Main', $featureField, 'Metadata');
        $fields->addFieldToTab('Root.Main', $teaserField, 'Metadata');

        $productLinkField = DropdownField::create('LinkedProductID', 'Link a Product', Product::get()->map('ID', 'ProductName'));
        $productLinkField->setEmptyString('(Select one)');        

        $fields->addFieldToTab('Root.Main', $productLinkField, 'Content');

        $productLinkField->addExtraClass('stacked');
        $featureField->addExtraClass("stacked");
        $teaserField->addExtraClass("stacked");

        return $fields; 
    }
}

SS模板

<% loop $Children %>
    <div class="category-card mb-5">
        <div class="row">
           <div class="col-md-4">

                <img src="$FeatureImage.URL" class="fluid-image"/>
//This renders for standard ProductPage children

            </div>
            <div class="col-md-8 category-card-body">
               <h4 class="category-card-title"><a href="$Link">$MenuTitle</a></h4>
                <p class="category-card-text">$TeaserText</p>
//This TeaserText renders fine.

                <a href="$Link" class="category-card-link btn btn-info">view details</a>
             </div>                                           
        </div>
    </div>                           
<% end_loop %>

Answer 1

这可能是一个边缘用例，但我认为它是有效的，并且会为需要做同样事情的其他人发布我的解决方案。

VirtualPage类将提取所有数据库字段，但不会提取has_one关系，因此您无法从虚拟页面访问它。

来自VirtualPage.php：

* Note: This Only duplicates $db fields and not the $has_one etc..

我的解决方案是在虚拟页面类中包含一个方法，该方法将使用＆lt;％with％＆gt;

返回实际的父页面对象
public function getTheParentPageObject(){ $page = DataObject::get_by_id(SiteTree::class, $this->getField('CopyContentFromID')); return $page; }

这允许我在模板中调用循环中的方法并拉出虚拟化之外的所有字段

<% loop $Children %> <div class="category-card mb-5"> <div class="row"> <div class="col-md-4"> <% if $ClassName == "SilverStripe\CMS\Model\VirtualPage" %> <% with $getTheFeaturedImageById() %> <img src="$FeatureImage.URL" class="fluid-image"/> <% end_with %> <% else %> <img src="$FeatureImage.URL" class="fluid-image"/> <% end_if %> </div> <div class="col-md-8 category-card-body"> <h4 class="category-card-title"><a href="$Link">$MenuTitle</a></h4> <p class="category-card-text">$TeaserText</p> <a href="$Link" class="category-card-link btn btn-info">view details</a> </div> </div> </div> <% end_loop %>

循环时，我无法从VirtualPage conatiner访问has_one图像

1 个答案: