如何在Symfony 2和Doctrine中过滤实体对象中的数据 - How filter data inside entity object in Symfony 2 and Doctrine

How filter data inside entity object in Symfony 2 and Doctrine

我有两个实体:Product和Feature。Product有许多其他的Features(一对多的关系)。每个Feature都有一个名称和一个重要的状态(如果功能重要则为true，如果不重要则为false)。我想把我的产品的所有重要功能都加入TWIG。

下面的解决方案非常难看:

Product: {{ product.name }}
Important features:
{% for feature in product.features %}
    {% if feature.important == true %}
        - {{ feature.name }}
    {% endif %}
{% endfor %}

所以我想得到:

Product: {{ product.name }}
Important features:
{% for feature in product.importantFeatures %}
     - {{ feature.name }}
{% endfor %}

我必须过滤数据在实体对象，但如何?

// MyBundle/Entity/Vehicle.php
class Product {
    protected $features; // (oneToMany)
    // ...
    protected getFeatures() { // default method
        return $this->features;
    }
    protected getImportantFeatures() { // my custom method
        // ? what next ?
    }
}
// MyBundle/Entity/Feature.php
class Feature {
    protected $name;      // (string)
    protected $important; // (boolean)
    // ...
}

您可以使用Criteria类来过滤出相关特性的Arraycollection

class Product {
    protected $features; // (oneToMany)
    // ...
    protected getFeatures() { // default method
        return $this->features;
    }
    protected getImportantFeatures() { // my custom method
        $criteria = 'Doctrine'Common'Collections'Criteria::create()
                    ->where('Doctrine'Common'Collections'Criteria::expr()->eq("important", true));
     return $this->features->matching($criteria);
    }
}

在树枝上

Product: {{ product.name }}
Important features:
{% for feature in product.getImportantFeatures() %}
     - {{ feature.name }}
{% endfor %}

您可以从存储库

$featureEntityRepository->findBy(array(
    'impoertant' => true,
    'product' => $product->getId()
));