问题
I made a web application with Symfony2, in which a User has an array correlation ManytoMany with the entity Mission. The User can upload the entity $product through a form, and one of the data passed by the form is the mission associated to the user.
There are more than only one mission for every user; so, when he uploads a $product object, he should also be able to select the mission he prefers.
To upload the file I use a form in a controller in the following way:
$form = $this->createFormBuilder($product)
->add('mission', 'entity', array('required' => true, 'multiple' => false, 'class' => 'AcmeManagementBundle:Mission', 'query_builder' => function($repository) { return $repository->createQueryBuilder('c')->orderBy('c.id', 'ASC'); },))
//...
->add('save', 'submit')
->getForm();
It works, but not fine: indeed in this field I can select all the mission stored, and not only the ones associated with the user.
I tried then with:
$form = $this->createFormBuilder($product)
->add('mission', 'collection', array('required' => true) )
//...
->add('save', 'submit')
->getForm();
It works but shows only one mission, and doesn't allow the user to select the preferred mission.
I tried also with:
->add('mission', 'collection', array('required' => true) )
but it tells me:
Neither the property "missions" nor one of the methods "getMissions()",
"isMissions()", "hasMissions()", "__get()" exist and have public access
in class "Acme\GroundStationBundle\Entity\Product".
How I should change my controller??
My product entity is:
class Product
{
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\OneToMany(targetEntity="Acme\ManagementBundle\Entity\Mission", mappedBy="product")
*/
protected $mission;
//...
/**
* Set mission
*
* @param string $mission
* @return Product
*/
public function setMission($mission)
{
$this->mission = $mission;
return $this;
}
/**
* Get mission
*
* @return string
*/
public function getMission()
{
return $this->mission;
}
//...
UPDATE ---
I will post also my product and mission entity, as asked in the comments
This is my User Entity is:
abstract class User extends BaseUser
{
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\ManyToMany(targetEntity="Acme\ManagementBundle\Entity\Mission", inversedBy="users", orphanRemoval=true)
* @ORM\JoinTable(name="user_mission")
*/
private $missions;
/**
* Add missions
*
* @param \Acme\ManagementBundle\Entity\Mission $missions
* @return User
*/
public function addMission(\Acme\ManagementBundle\Entity\Mission $missions)
{
$this->missions[] = $missions;
return $this;
}
//...
And my Mission Entity:
<?php
namespace Acme\ManagementBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
/**
* @ORM\Entity
*/
class Mission {
/**
* @ORM\Id
* @ORM\GeneratedValue
* @ORM\Column(type="integer")
* @var integer
*/
protected $id;
/**
* @ORM\Column(type="string", length=60)
* @var String
*/
protected $name;
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\ManyToOne(targetEntity="Acme\GroundStationBundle\Entity\Product", inversedBy="mission")
* @ORM\JoinColumn(name="productId", referencedColumnName= "id")
*/
private $product;
/**
* @ORM\Column(type="string", length=600)
* @var String
*/
protected $description;
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\ManyToMany(targetEntity="Acme\ManagementBundle\Entity\User", mappedBy="missions", cascade={"all"}, orphanRemoval=true)
*/
private $users;
public function __construct(){
$this -> users = new ArrayCollection();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
* @return Mission
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Set description
*
* @param string $description
* @return Mission
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Get description
*
* @return string
*/
public function getDescription()
{
return $this->description;
}
/**
* Add users
*
* @param \Acme\ManagementBundle\Entity\User $users
* @return Mission
*/
public function addUser(\Acme\ManagementBundle\Entity\User $users)
{
$this->users[] = $users;
return $this;
}
/**
* Remove users
*
* @param \Acme\ManagementBundle\Entity\User $users
*/
public function removeUser(\Acme\ManagementBundle\Entity\User $users)
{
$this->users->removeElement($users);
}
/**
* Get users
*
* @return \Doctrine\Common\Collections\Collection
*/
public function getUsers()
{
return $this->users;
}
public function __toString()
{
return $this->name;
}
/**
* Set product
*
* @param \Acme\GroundStationBundle\Entity\Product $product
* @return Mission
*/
public function setProduct(\Acme\GroundStationBundle\Entity\Product $product = null)
{
$this->product = $product;
return $this;
}
/**
* Get product
*
* @return \Acme\GroundStationBundle\Entity\Product
*/
public function getProduct()
{
return $this->product;
}
}
回答1:
Please take a look at my changes to your code.
When you define One(product)ToMany(missions) relation you have situation like this:
1. Product has many missions and must have an ArrayCollection of missions which you can add, remove or get all.
class Product
{
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\OneToMany(targetEntity="Acme\ManagementBundle\Entity\Mission", mappedBy="product")
*/
// RENAME this attribute to plural. Product HAS MANY missions
// Than naming convention is "human readable" addMission and removeMission from collection but getMissions
protected $missions;
//...
//
// remove those functions:
public function setMission($mission)
//...
public function getMission()
//...
//
// add those functions:
public function __construct(){
$this->missions = new ArrayCollection();
}
public function addMission( Acme\ManagementBundle\Entity\Mission $mission )
{
$this->missions[] = $mission;
return $this;
}
public function removeMission( Acme\ManagementBundle\Entity\Mission $mission )
{
$this->missions->removeElement( $mission );
return $this;
}
public function getMissions()
{
return $this->missions;
}
//...
2. Many MissionS are owned by one product. Change only annotation
class Mission {
//...
// RENAME inversedBy to missions
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\ManyToOne(targetEntity="Acme\GroundStationBundle\Entity\Product", inversedBy="missions")
* @ORM\JoinColumn(name="productId", referencedColumnName= "id")
*/
private $product;
EDIT START
3. Opposite - MANY products Belongs to one Mission If there is situation like you mentioned in comment, then your Annotations are wrong. Look at this fix:
class Product
{
// ...
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\ManyToOne(targetEntity="Acme\GroundStationBundle\Entity\Mission", inversedBy="products")
* @ORM\JoinColumn(name="missionId", referencedColumnName= "id")
*/
protected $mission;
// ...
// roll back this functions:
public function setMission($mission)
public function getMission()
// remove those functions
public function __construct(){
public function addMission( Acme\ManagementBundle\Entity\Mission $mission )
public function removeMission( Acme\ManagementBundle\Entity\Mission $mission )
public function getMissions()
//...
class Mission {
// ...
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\OneToMany(targetEntity="Acme\ManagementBundle\Entity\Product", mappedBy="mission")
*/
private $products;
// ...
//
// remove those functions:
public function setProduct($product)
public function getProduct()
//...
//
// add those functions:
public function __construct(){
$this->products = new ArrayCollection();
}
public function addProduct( Acme\ManagementBundle\Entity\Product $product )
{
$this->products[] = $product;
return $this;
}
public function removeProduct( Acme\ManagementBundle\Entity\Product $product )
{
$this->products->removeElement( $product );
return $this;
}
public function geProducts()
{
return $this->products;
}
//...
EDIT END
3. After that remember to:
$ php app/console doctrine:generate:entities AcmeGroundStationBundle:Product
$ php app/console doctrine:generate:entities AcmeGroundStationBundle:Mission
$ php app/console doctrine:schema:update --force
Good Luck!
回答2:
By saying this:
Neither the property "missions" nor one of the methods "getMissions()", "isMissions()", "hasMissions()", "__get()" exist and have public access in class "Acme\GroundStationBundle\Entity\Product".
Symfony2 is telling you that you have to set a relationship between Mission and Product entities.
Try to create a oneToMany/manyToOne relationship between those entities by setting up annotations and properties in your objects. I'm not proficient enough in annotations, but I can tell what it would look like in Yaml:
# in Product:
oneToMany:
missions:
targetEntity: Mission
mappedBy: product
# in Mission:
manyToOne:
product:
targetEntity: Product
inversedBy: missions
joinColumn:
name: productId
referencedColumnName: id
Before you test, don't forget to update your objects to your annotations:
$ php app/console doctrine:generate:entities YourBundle:Product
$ php app/console doctrine:generate:entities YourBundle:Mission
Then, tell us what happens in the commentaries. You're gonna have to do some testing before you get it working, in my opinion, but you're on the way ;)
来源：https://stackoverflow.com/questions/21446285/arraycollection-retrieve-collection-in-a-form