我创建了一个Twig扩展，在服务中注册了它，但是我得到了一个错误：
这是扩展名：
<?php
// src/AppBundle/Twig/AppExtension.php
namespace Mp\ShopBundle\twig;
class AppExtension extends \Twig_Extension
{
public function getFunctions()
{
return array(
'getTotalPrice' => new \Twig_Function_Method($this, 'getTotalPrice'));
}
public function getTotalPrice(Items $items)
{
$total = 0;
foreach($items as $item){
$total += $item->getPrice();
}
return $total;
}
public function getName()
{
return 'app_extension';
}
}
服务：
services:
app.twig_extension:
class: Mp\ShopBundle\twig\AppExtension
public: false
tags:
- { name: twig.extension }
现在我想用我的扩展计算产品总和，如下所示：
{% for item in product %}
<td> ${{getTotalPrice(item)}}.00</td>
{% endfor %}
但是我收到了这个错误：
在渲染模板期间抛出异常（“Catchable Fatal Error：传递给Mp \ ShopBundle \ twig \ AppExtension :: getTotalPrice（）的参数1必须是Mp \ ShopBundle \ twig \ Items，instance的实例给出的Mp \ ShopBundle \ Entity \ Product，在第175行的C：\ wamp \ www \ Digid \ tree \ app \ cache \ dev \ twig \ b4 \ 5d \ b2cbf04f86aeef591812f9721d41a678d3fc5dbbd3aae638883d71c26af0.php中调用，并在MpShopBundle中定义：）：前端：第92行的product_summary.html.twig。
产品：
<?php
namespace Mp\ShopBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use Sonata\ClassificationBundle\Model\TagInterface;
use Sonata\ClassificationBundle\Model\Tag;
/**
* Product
*
* @ORM\Table(name="product", indexes={@ORM\Index(name="product_type_id", columns={"product_type_id"})})
* @ORM\Entity
*/
class Product
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="model", type="string", length=255, nullable=true)
*/
private $model;
/**
* @var \Mp\ShopBundle\Entity\ProductType
*
* @ORM\ManyToOne(targetEntity="Mp\ShopBundle\Entity\ProductType")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="product_type_id", referencedColumnName="id")
* })
*/
private $productType;
/**
* @var \Mp\ShopBundle\Entity\ProductLanguageData
*
* @ORM\OneToMany(targetEntity="ProductLanguageData", mappedBy="product", cascade={"persist"}, orphanRemoval=true)
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id", referencedColumnName="product_id")
* })
*/
private $translations;
/**
* @var string
*
* @ORM\Column(name="admin_title", type="string", length=255, nullable=true)
*/
private $admin_title;
protected $tags;
/**
* @var \Application\Sonata\ClassificationBundle\Entity\Category
*
* @ORM\ManyToOne(targetEntity="Application\Sonata\ClassificationBundle\Entity\Category")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="category_id", referencedColumnName="id")
* })
*/
private $category;
/**
* @var \Application\Sonata\ClassificationBundle\Entity\Category
*
* @ORM\ManyToOne(targetEntity="Application\Sonata\ClassificationBundle\Entity\Category")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="subcategory_id", referencedColumnName="id")
* })
*/
private $subcategory;
/**
* @var \Application\Sonata\ClassificationBundle\Entity\Collection
*
* @ORM\ManyToOne(targetEntity="Application\Sonata\ClassificationBundle\Entity\Collection")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="manufacturer_id", referencedColumnName="id")
* })
*/
private $manufacturer;
/**
* @var boolean
*
* @ORM\Column(name="status", type="boolean")
*/
private $status;
/**
* @ORM\Column(name="created_at", type="datetime")
*/
private $created_at;
/**
* @ORM\Column(name="updated_at", type="datetime")
*/
private $updated_at;
/**
* @ORM\Column(name="pc", type="decimal", precision=10, scale=2, nullable=true)
*/
private $pc;
/**
* @ORM\Column(name="value", type="decimal", precision=10, scale=2, nullable=true)
*/
private $value;
/**
* @ORM\Column(name="discount", type="decimal", precision=10, scale=2, nullable=true)
*/
private $discount;
/**
* @ORM\Column(name="base", type="decimal", precision=10, scale=2, nullable=true)
*/
private $base;
/**
* @ORM\Column(name="price", type="decimal", precision=10, scale=2, nullable=true)
*/
private $price;
/**
* @ORM\Column(name="stock", type="integer", nullable=true)
*/
private $stock;
/**
* @ORM\Column(name="map", type="string", length=255, nullable=true)
*/
private $map;
/**
* @ORM\Column(name="feature1", type="string", length=255, nullable=true)
*/
private $feature1;
/**
* @ORM\Column(name="feature2", type="string", length=255, nullable=true)
*/
private $feature2;
/**
* @ORM\Column(name="feature3", type="string", length=255, nullable=true)
*/
private $feature3;
/**
* @ORM\Column(name="feature4", type="string", length=255, nullable=true)
*/
private $feature4;
/**
* @ORM\Column(name="feature5", type="string", length=255, nullable=true)
*/
private $feature5;
/**
* @ORM\Column(name="feature6", type="string", length=255, nullable=true)
*/
private $feature6;
/**
* @ORM\Column(name="feature7", type="string", length=255, nullable=true)
*/
private $feature7;
/**
* @ORM\Column(name="feature8", type="string", length=255, nullable=true)
*/
private $feature8;
/**
* @var boolean
*
* @ORM\Column(name="published", type="boolean", nullable=true)
*/
private $published;
/**
* @ORM\Column(name="url_marketing", type="string", length=255, nullable=true)
*/
private $url_marketing;
/**
* @ORM\Column(name="cesion_tienda", type="string", length=255, nullable=true)
*/
private $cesion_tienda;
/**
* @ORM\Column(name="google", type="string", length=255, nullable=true)
*/
private $google;
/**
* @ORM\Column(name="provider_reference", type="string", length=255, nullable=true)
*/
private $provider_reference;
private $gallery;
/**
* @ORM\Column(name="vat", type="string", length=255, nullable=true)
*/
private $vat;
private $provider;
/**
* @var string
*
* @ORM\Column(name="video1", type="text", length=65535, nullable=true)
*/
private $video1;
/**
* @var string
*
* @ORM\Column(name="video2", type="text", length=65535, nullable=true)
*/
private $video2;
/**
* @var string
*
* @ORM\Column(name="friendly_url", type="string", length=255, nullable=true)
*/
private $friendly_url;
/**
* @var string
*
* @ORM\Column(name="shop_assignment", type="text", length=65535, nullable=true)
*/
private $shop_assignment;
/**
* @var string
*
* @ORM\Column(name="custom_product_type", type="string", length=255, nullable=true)
*/
private $custom_product_type;
/**
* Set model
*
* @param string $model
* @return Product
*/
public function setModel($model)
{
$this->model = $model;
return $this;
}
/**
* Get model
*
* @return string
*/
public function getModel()
{
return $this->model;
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set productType
*
* @param \Mp\ShopBundle\Entity\ProductType $productType
* @return Product
*/
public function setProductType(\Mp\ShopBundle\Entity\ProductType $productType = null)
{
$this->productType = $productType;
return $this;
}
/**
* Get productType
*
* @return \Mp\ShopBundle\Entity\ProductType
*/
public function getProductType()
{
return $this->productType;
}
/**
* Get translations
*
* @return \Mp\ShopBundle\Entity\ProductLanguageData
*/
public function getTranslations()
{
return $this->translations;
}
/**
* Set translations
*
* @param \Doctrine\ORM\PersistentCollection $translations
* @return Product
*/
public function setTranslations(\Doctrine\ORM\PersistentCollection $translations)
{
$this->translations = new ArrayCollection();
foreach ($translations as $s) {
$this->addTranslation($s);
}
return $this;
}
/**
* Add translation
*
* @param \Mp\ShopBundle\Entity\ProductLanguageData $translation
*/
public function addTranslation(\Mp\ShopBundle\Entity\ProductLanguageData $translation)
{
$translation->setProduct($this);
$this->translations[] = $translation;
}
/**
* Remove translation
*
* @param \Mp\ShopBundle\Entity\ProductLanguageData $translation
*/
public function removeTranslation(\Mp\ShopBundle\Entity\ProductLanguageData $translation)
{
foreach ($this->translations as $k => $s) {
if ($s->getId() == $translation->getId()) {
unset($this->translations[$k]);
}
}
}
/**
* Get string value
*
* @return string
*/
public function __toString()
{
return ($this->admin_title == "") ? "Product" : $this->admin_title;
}
/**
* Constructor
*/
public function __construct()
{
//$this->translations = new \Doctrine\Common\Collections\ArrayCollection();
$this->tags = new ArrayCollection();
$this->status = false;
}
/**
* Set admin_title
*
* @param string $adminTitle
* @return Product
*/
public function setAdminTitle($adminTitle)
{
$this->admin_title = $adminTitle;
return $this;
}
/**
* Get admin_title
*
* @return string
*/
public function getAdminTitle()
{
return $this->admin_title;
}
/**
* Add tags
*
* @param \Sonata\ClassificationBundle\Model\TagInterface $tags
*/
public function addTags(TagInterface $tags)
{
$this->tags[] = $tags;
}
/**
* Get tags
*
* @return array $tags
*/
public function getTags()
{
return $this->tags;
}
/**
* @param $tags
*
* @return mixed
*/
public function setTags($tags)
{
$this->tags = $tags;
}
/**
* Set category
*
* @param \Application\Sonata\ClassificationBundle\Entity\Category $category
* @return Product
*/
public function setCategory(\Application\Sonata\ClassificationBundle\Entity\Category $category = null)
{
$this->category = $category;
return $this;
}
/**
* Get category
*
* @return \Application\Sonata\ClassificationBundle\Entity\Category
*/
public function getCategory()
{
return $this->category;
}
/**
* Add tags
*
* @param \Application\Sonata\ClassificationBundle\Entity\Tag $tags
* @return Product
*/
public function addTag(\Application\Sonata\ClassificationBundle\Entity\Tag $tags)
{
$this->tags[] = $tags;
return $this;
}
/**
* Remove tags
*
* @param \Application\Sonata\ClassificationBundle\Entity\Tag $tags
*/
public function removeTag(\Application\Sonata\ClassificationBundle\Entity\Tag $tags)
{
$this->tags->removeElement($tags);
}
/**
* Set subcategory
*
* @param \Application\Sonata\ClassificationBundle\Entity\Category $subcategory
* @return Product
*/
public function setSubcategory(\Application\Sonata\ClassificationBundle\Entity\Category $subcategory = null)
{
$this->subcategory = $subcategory;
return $this;
}
/**
* Get subcategory
*
* @return \Application\Sonata\ClassificationBundle\Entity\Category
*/
public function getSubcategory()
{
return $this->subcategory;
}
/**
* Set manufacturer
*
* @param \Application\Sonata\ClassificationBundle\Entity\Collection $manufacturer
* @return Product
*/
public function setManufacturer(\Application\Sonata\ClassificationBundle\Entity\Collection $manufacturer = null)
{
$this->manufacturer = $manufacturer;
return $this;
}
/**
* Get manufacturer
*
* @return \Application\Sonata\ClassificationBundle\Entity\Collection
*/
public function getManufacturer()
{
return $this->manufacturer;
}
/**
* Set status
*
* @param boolean $status
* @return Product
*/
public function setStatus($status)
{
$this->status = $status;
return $this;
}
/**
* Get status
*
* @return boolean
*/
public function getStatus()
{
return $this->status;
}
/**
* Set created_at
*
* @param \DateTime $createdAt
* @return Product
*/
public function setCreatedAt($createdAt)
{
$this->created_at = $createdAt;
return $this;
}
/**
* Get created_at
*
* @return \DateTime
*/
public function getCreatedAt()
{
return $this->created_at;
}
/**
* Set updated_at
*
* @param \DateTime $updatedAt
* @return Product
*/
public function setUpdatedAt($updatedAt)
{
$this->updated_at = $updatedAt;
return $this;
}
/**
* Get updated_at
*
* @return \DateTime
*/
public function getUpdatedAt()
{
return $this->updated_at;
}
/**
* Set pc
*
* @param string $pc
* @return Product
*/
public function setPc($pc)
{
$this->pc = $pc;
return $this;
}
/**
* Get pc
*
* @return string
*/
public function getPc()
{
return $this->pc;
}
/**
* Set value
*
* @param string $value
* @return Product
*/
public function setValue($value)
{
$this->value = $value;
return $this;
}
/**
* Get value
*
* @return string
*/
public function getValue()
{
return $this->value;
}
/**
* Set discount
*
* @param string $discount
* @return Product
*/
public function setDiscount($discount)
{
$this->discount = $discount;
return $this;
}
/**
* Get discount
*
* @return string
*/
public function getDiscount()
{
return $this->discount;
}
/**
* Set base
*
* @param string $base
* @return Product
*/
public function setBase($base)
{
$this->base = $base;
return $this;
}
/**
* Get base
*
* @return string
*/
public function getBase()
{
return $this->base;
}
/**
* Set price
*
* @param string $price
* @return Product
*/
public function setPrice($price)
{
$this->price = $price;
return $this;
}
/**
* Get price
*
* @return string
*/
public function getPrice()
{
return $this->price;
}
/**
* Set stock
*
* @param string $stock
* @return Product
*/
public function setStock($stock)
{
$this->stock = $stock;
return $this;
}
/**
* Get stock
*
* @return string
*/
public function getStock()
{
return $this->stock;
}
/**
* Set map
*
* @param string $map
* @return Product
*/
public function setMap($map)
{
$this->map = $map;
return $this;
}
/**
* Get map
*
* @return string
*/
public function getMap()
{
return $this->map;
}
/**
* Set feature1
*
* @param string $feature1
* @return Product
*/
public function setFeature1($feature1)
{
$this->feature1 = $feature1;
return $this;
}
/**
* Get feature1
*
* @return string
*/
public function getFeature1()
{
return $this->feature1;
}
/**
* Set feature2
*
* @param string $feature2
* @return Product
*/
public function setFeature2($feature2)
{
$this->feature2 = $feature2;
return $this;
}
/**
* Get feature2
*
* @return string
*/
public function getFeature2()
{
return $this->feature2;
}
/**
* Set feature3
*
* @param string $feature3
* @return Product
*/
public function setFeature3($feature3)
{
$this->feature3 = $feature3;
return $this;
}
/**
* Get feature3
*
* @return string
*/
public function getFeature3()
{
return $this->feature3;
}
/**
* Set feature4
*
* @param string $feature4
* @return Product
*/
public function setFeature4($feature4)
{
$this->feature4 = $feature4;
return $this;
}
/**
* Get feature4
*
* @return string
*/
public function getFeature4()
{
return $this->feature4;
}
/**
* Set feature5
*
* @param string $feature5
* @return Product
*/
public function setFeature5($feature5)
{
$this->feature5 = $feature5;
return $this;
}
/**
* Get feature5
*
* @return string
*/
public function getFeature5()
{
return $this->feature5;
}
/**
* Set feature6
*
* @param string $feature6
* @return Product
*/
public function setFeature6($feature6)
{
$this->feature6 = $feature6;
return $this;
}
/**
* Get feature6
*
* @return string
*/
public function getFeature6()
{
return $this->feature6;
}
/**
* Set feature7
*
* @param string $feature7
* @return Product
*/
public function setFeature7($feature7)
{
$this->feature7 = $feature7;
return $this;
}
/**
* Get feature7
*
* @return string
*/
public function getFeature7()
{
return $this->feature7;
}
/**
* Set feature8
*
* @param string $feature8
* @return Product
*/
public function setFeature8($feature8)
{
$this->feature8 = $feature8;
return $this;
}
/**
* Get feature8
*
* @return string
*/
public function getFeature8()
{
return $this->feature8;
}
/**
* Set published
*
* @param boolean $published
* @return Product
*/
public function setPublished($published)
{
$this->published = $published;
return $this;
}
/**
* Get published
*
* @return boolean
*/
public function getPublished()
{
return $this->published;
}
/**
* Set url_marketing
*
* @param string $urlMarketing
* @return Product
*/
public function setUrlMarketing($urlMarketing)
{
$this->url_marketing = $urlMarketing;
return $this;
}
/**
* Get url_marketing
*
* @return string
*/
public function getUrlMarketing()
{
return $this->url_marketing;
}
/**
* Set cesion_tienda
*
* @param string $cesionTienda
* @return Product
*/
public function setCesionTienda($cesionTienda)
{
$this->cesion_tienda = $cesionTienda;
return $this;
}
/**
* Get cesion_tienda
*
* @return string
*/
public function getCesionTienda()
{
return $this->cesion_tienda;
}
/**
* Set google
*
* @param string $google
* @return Product
*/
public function setGoogle($google)
{
$this->google = $google;
return $this;
}
/**
* Get google
*
* @return string
*/
public function getGoogle()
{
return $this->google;
}
/**
* Set provider_reference
*
* @param string $providerReference
* @return Product
*/
public function setProviderReference($providerReference)
{
$this->provider_reference = $providerReference;
return $this;
}
/**
* Get provider_reference
*
* @return string
*/
public function getProviderReference()
{
return $this->provider_reference;
}
/**
* Set gallery
*
* @param \Application\Sonata\MediaBundle\Entity\Gallery $gallery
* @return Product
*/
public function setGallery(\Application\Sonata\MediaBundle\Entity\Gallery $gallery = null)
{
$this->gallery = $gallery;
return $this;
}
/**
* Get gallery
*
* @return \Application\Sonata\MediaBundle\Entity\Gallery
*/
public function getGallery()
{
return $this->gallery;
}
/**
* Set vat
*
* @param string $vat
* @return Product
*/
public function setVat($vat)
{
$this->vat = $vat;
return $this;
}
/**
* Get vat
*
* @return string
*/
public function getVat()
{
return $this->vat;
}
/**
* Set provider
*
* @param \Application\Sonata\UserBundle\Entity\User $provider
* @return Product
*/
public function setProvider(\Application\Sonata\UserBundle\Entity\User $provider = null)
{
$this->provider = $provider;
return $this;
}
/**
* Get provider
*
* @return \Application\Sonata\UserBundle\Entity\User
*/
public function getProvider()
{
return $this->provider;
}
/**
* Set video1
*
* @param string $video1
* @return Product
*/
public function setVideo1($video1)
{
$this->video1 = $video1;
return $this;
}
/**
* Get custom_product_type
*
* @return string
*/
public function getCustomProductType()
{
return $this->custom_product_type;
}
}
所以出于某种原因它传递了错误的类？如何解决这个问题？
答案 0 :(得分：0)
如果要传递Product对象（实体）的引用，则必须通知您的方法：
use Mp\ShopBundle\Entity\Product; - src / AppBundle / Twig / AppExtension.php
然后将您的Items更改为Product对象：
...
public function getTotalPrice(Product $items) {
....
答案 1 :(得分：0)
是的，你在twig模板中传递了错误的类。
在这部分代码中：
{% for item in product %}
<td>${{getTotalPrice(item)}}.00</td>
{% endfor %}
您正在传递item参数，该参数是Product类的实例。
您应该重写Twig扩展名以接受Product个实例：
public function getTotalPrice($items)
{
$total = 0;
foreach($items as $item){
$total += $item->getPrice();
}
return $total;
}
然后传递整个数组，而不仅仅是一个Product：
<td>${{getTotalPrice(product)}}.00</td>
希望这有帮助！