如何访问方法并在模板内传递参数? [英] How to access a method and pass an argument within the template?

问题描述

在我的模板中，我想检查一个实体是否与另一个实体有关系.意味着一个对象在另一个对象的附加对象存储中.

In my template I want check whether an entity has a relation to another one. Meaning one object is in an attached Object Storage of another one.

在控制器中，我可以简单地调用:

In the controller I can simply call:

if ($product->getCategory()->offsetExists($category) {
    print 'In category ' . $category->getName();
}

但是我无法在模板中找出正确的语法.我尝试了那些没有运气的人(每次都评估为true):

But I can't figure out the correct syntax in the template. I tried those without luck (both evaluate to true everytime):

<f:if condition="{product.category.offsetExists(category)}">true</f:if>    
<f:if condition="{product.category.offsetExists({category})}">true</f:if>

这甚至可以在模板中实现吗?

Is this even possible within the template?

推荐答案

除了 sretuer的答案外，我只提到您可以创建VH，该VH将有条件地显示块，例如:

Additionally to sretuer's answer, I'll only mention that you can create VH which will display block conditionally like:

文件typo3conf/ext/your_ext/ViewHelpers/CheckOffsetViewHelper.php

<?php
namespace VENDORNAME\YourExt\ViewHelpers;

class CheckOffsetViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper {
    public function render() {
        return ($product->getCategory()->offsetExists($category)) 
               ? $this->renderChildren()
               : '';
    }
}
?>

因此您可以在视图中使用它:

So you can use it in the view:

{namespace vh=VENDORNAME\YourExt\ViewHelpers}

<vh:checkOffset product="{product}" category="{category}" >
    Display this only if product is in category 
</vh:checkOffset>

当然，您需要根据扩展名来修复VENDORNAME和YourExt，可以在每个控制器，模型，存储库等的开头找到该文件.

Of course you need to fix VENDORNAME and YourExt according to your extension, can be found at the beginning of every controller, model, repository etc.

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