过去两天我坚持这一点。我正在创建巴士旅游网站。目前我正处于向数据库添加新总线的阶段。
一辆公共汽车（或所有公共汽车）都有许多便利设施（如AirCon，WiFi，厨房......），每个都需要定制价格。我们说我们的公共汽车有AirCon。这辆公共汽车的AirCon费用为50美元，但对于其他公共汽车，AirCon可能需要100美元。为此，我创建了3个实体（公交车辆实体，设施实体和公交车辆设施实体）。内部设施实体我将存储公共汽车的Id，舒适性的ID以及该公共汽车ID的便利设施的价格。
问题在于我无法使其发挥作用。在为该字段呈现表单时，我得到了空白的HTML元素。我无法添加或删除多个设施，我不确定它为什么不起作用。
有人知道问题出在哪里吗？
以下是我使用的代码：
设施实体：
<?php
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
/**
* Amenities
*
* @ORM\Table(name="amenities", indexes={@ORM\Index(name="administrator_id", columns={"administrator_id"})})
* @ORM\Entity
*/
class Amenities
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="name", type="string", length=100, nullable=true)
*/
private $name;
/**
* @var \DateTime
*
* @ORM\Column(name="created_at", type="datetime", nullable=false)
*/
private $createdAt = 'CURRENT_TIMESTAMP';
/**
* @var \DateTime
*
* @ORM\Column(name="modified_at", type="datetime", nullable=false)
*/
private $modifiedAt = 'CURRENT_TIMESTAMP';
/**
* @var \AppBundle\Entity\Users
*
* @ORM\ManyToOne(targetEntity="Users")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="administrator_id", referencedColumnName="id")
* })
*/
private $administrator;
/**
* @ORM\OneToMany(targetEntity="BusVehiclesAmenities", mappedBy="amenities")
*/
private $amenities;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*
* @return Amenities
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Set createdAt
*
* @param \DateTime $createdAt
*
* @return Amenities
*/
public function setCreatedAt($createdAt)
{
$this->createdAt = $createdAt;
return $this;
}
/**
* Get createdAt
*
* @return \DateTime
*/
public function getCreatedAt()
{
return $this->createdAt;
}
/**
* Constructor
*/
public function __construct()
{
$this->amenities = new ArrayCollection();
}
/**
* Add amenities
*
* @param \AppBundle\Entity\BusVehiclesAmenities $amenities
* @return Amenities
*/
public function addAmenities(BusVehiclesAmenities $amenities)
{
$this->amenities[] = $amenities;
return $this;
}
/**
* Remove amenities
*
* @param \AppBundle\Entity\BusVehiclesAmenities $amenities
*/
public function removeAmenities(BusVehiclesAmenities $amenities)
{
$this->amenities->removeElement($amenities);
}
/**
* Get amenities_bus_vehicles
*
* @return ArrayCollection
*/
public function getAmenities()
{
return $this->amenities;
}
}
巴士车辆实体：
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
/**
* BusVehicles
*
* @ORM\Table(name="bus_vehicles", indexes={@ORM\Index(name="company_id", columns={"company_id"}), @ORM\Index(name="bus_type", columns={"bus_type"}), @ORM\Index(name="fuel_type", columns={"fuel_type"}), @ORM\Index(name="emission_class", columns={"emission_class"})})
* @ORM\Entity
*/
class BusVehicles
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="licence_plate", type="string", length=100, nullable=false)
*/
private $licencePlate;
/**
* @var \AppBundle\Entity\Companies
*
* @ORM\ManyToOne(targetEntity="Companies")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="company_id", referencedColumnName="id")
* })
*/
private $company;
/**
* @var \AppBundle\Entity\BusTypes
*
* @ORM\ManyToOne(targetEntity="BusTypes", inversedBy="busType")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="bus_type", referencedColumnName="id")
* })
*/
/**
* @ORM\OneToMany(targetEntity="BusVehiclesAmenities", mappedBy="bus")
*/
private $busVehiclesAmenities;
public function __construct()
{
$this->busVehiclesAmenities = new ArrayCollection();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Add busVehiclesAmenities
*
* @param \AppBundle\Entity\BusVehiclesAmenities busVehiclesAmenities
* @return BusVehicles
*/
public function addBusVehiclesAmenities(BusVehiclesAmenities $busVehiclesAmenities)
{
$this->busVehiclesAmenities[] = $busVehiclesAmenities;
return $this;
}
/**
* Remove busVehiclesAmenities
*
* @param \AppBundle\Entity\BusVehiclesAmenities $busVehiclesAmenities
*/
public function removeBusVehiclesAmenities(BusVehiclesAmenities $busVehiclesAmenities)
{
$this->busVehiclesAmenities->removeElement($busVehiclesAmenities);
}
/**
* Get busVehiclesAmenities
*
* @return ArrayCollection
*/
public function getBusVehiclesAmenities()
{
return $this->busVehiclesAmenities;
}
/**
* Set licencePlate
*
* @param string $licencePlate
*
* @return BusVehicles
*/
public function setLicencePlate($licencePlate)
{
$this->licencePlate = $licencePlate;
return $this;
}
/**
* Set company
*
* @param \AppBundle\Entity\Companies $company
*
* @return BusVehicles
*/
public function setCompany(Companies $company = null)
{
$this->company = $company;
return $this;
}
/**
* Get company
*
* @return \AppBundle\Entity\Companies
*/
public function getCompany()
{
return $this->company;
}
}
巴士设施实体：
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* BusVehiclesAmenities
*
* @ORM\Table(name="bus_vehicles_amenities", indexes={@ORM\Index(name="amenities_id", columns={"amenities_id"}), @ORM\Index(name="bus_id", columns={"bus_id"})})
* @ORM\Entity
*/
class BusVehiclesAmenities
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
*
* @ORM\ManyToOne(targetEntity="BusVehicles", inversedBy="busVehiclesAmenities")
* @ORM\JoinColumn(name="bus_id", referencedColumnName="id")
*
*/
private $bus;
/**
*
* @ORM\ManyToOne(targetEntity="Amenities", inversedBy="amenities")
* @ORM\JoinColumn(name="amenities_id", referencedColumnName="id")
*
*/
private $amenities;
/**
* @var float
* @ORM\Column(name="price", type="float", scale=2)
*/
protected $price;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set Bus
*
* @param \AppBundle\Entity\BusVehicles
*
* @return BusVehiclesAmenities
*/
public function setBus($bus)
{
$this->bus = $bus;
return $this;
}
/**
* Get busId
*
* @return integer
*/
public function getBus()
{
return $this->bus;
}
/**
* Set amenities
*
* @param \AppBundle\Entity\Amenities
*
* @return BusVehiclesAmenities
*/
public function setAmenities($amenities)
{
$this->amenities = $amenities;
return $this;
}
/**
* Get amenities
*
* @return \AppBundle\Entity\Amenities
*/
public function getAmenities()
{
return $this->amenities;
}
/**
* Set price
*
* @param float $price
*
* @return BusVehiclesAmenities
*/
public function sePrice($price)
{
$this->price = $price;
return $this;
}
/**
* Get price
*
* @return float
*/
public function getPrice()
{
return $this->price;
}
}
形式：
添加新的总线表单：
<?php
namespace AdminBundle\Form\Type;
use AdminBundle\Form\Type\BusVehiclesAmenitiesType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\Extension\Core\Type\CollectionType;
class BusVehiclesType extends AbstractType
{
/**
* {@inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('licencePlate')
->add('company', EntityType::class, array(
'class' => 'AppBundle:Companies',
'choice_label' => 'name',
->add('busVehiclesAmenities', CollectionType::class, array(
'entry_type' => BusVehiclesAmenitiesType::class,
'allow_add' => true,
));
}
/**
* {@inheritdoc}
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'AppBundle\Entity\BusVehicles'
));
}
/**
* {@inheritdoc}
*/
public function getBlockPrefix()
{
return 'adminbundle_busvehicles';
}
}
巴士车辆设施表格
<?php
namespace AdminBundle\Form\Type;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\MoneyType;
use Symfony\Component\Form\FormBuilderInterface;
use AppBundle\Entity\BusVehiclesAmenities;
use Symfony\Component\OptionsResolver\OptionsResolver;
class BusVehiclesAmenitiesType extends AbstractType
{
/**
* {@inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('price', MoneyType::class, array(
'scale' => 2,
))
->add('amenities', EntityType::class, array(
'class' =>'AppBundle:Amenities',
'choice_label' => 'name',
))
;
}
/**
* {@inheritdoc}
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => BusVehiclesAmenities::class
));
}
/**
* {@inheritdoc}
*/
public function getBlockPrefix()
{
return 'appbundle_busvehiclesamenities';
}
}
答案 0 :(得分：2)
我不会将实体类用于表单绑定。 我将创建一个新类（例如BusVehicle），它包含需要在表单上的所有属性（特定字段）并将其用作'data_class'。这样您不仅可以解决问题，还可以将表示层与业务层分离（请参阅Multitier Architecture）。
我通常将这些类放在Form/Model目录中。
在您的情况下，该类将为Form/Model/BusVehicle，并且它将具有$amenities属性。
设施将是一系列Form/Model/Amenity个对象。
您可能需要使用embedded forms，不要将实体类用作'data_object'。成功绑定后，您实例化并填充实体以进行持久化或更新。
并且您不需要第三个实体（“公共汽车设施”）。