会话中的商店实体不起作用=> $ em-> persist（）

Question

起初：对不起我的英语不好:-)

初学者需要帮助！

我有3个实体/表格：

表：

contact_person
id, title, firstname, surname, adress_id

address
id, street, zip, city, country_id

country (fix values)
id, name, code
1, Austria, AT
2, Germany, DE
...

实体：

/**
 * ContactPerson
 *
 * @ORM\Table(name="contact_person")
 * @ORM\Entity
 * @ORM\HasLifecycleCallbacks
 */
class ContactPerson
{
    /**
     * @var integer $contactPersonId
     *
     * @ORM\Id
     * @ORM\Column(name="id", type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $contactPersonId;

    /**
     * @ORM\Column(name="title", type="string", columnDefinition="ENUM('m', 'w')")
     */
    private $title;

    /**
     * @ORM\Column(name="firstname", type="string", length=255)
     */
    private $firstName;

    /**
     * @ORM\Column(name="surname", type="string", length=255)
     */
    private $surName;

    /**
     * @ORM\OneToOne(targetEntity="Trac\TracBundle\Entity\Address", cascade={"persist"})
     * @ORM\JoinColumn(name="address_id", referencedColumnName="id")
     */
    protected $address;

    ...
}

/**
 * Address
 *
 * @ORM\Table(name="address")
 * @ORM\Entity
 * @ORM\HasLifecycleCallbacks
 */
class Address
{
    /**
     * @var integer $addresssId
     *
     * @ORM\Id
     * @ORM\Column(name="id", type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $addresssId;

    /**
     * @ORM\Column(name="street", type="string", length=255)
     */
    private $street;

    /**
     * @ORM\Column(name="zip", type="string", length=255)
     */
    private $zip;

    /**
     * @ORM\Column(name="city", type="string", length=255)
     */
    private $city;

    /**
     * @ORM\ManyToOne(targetEntity="Trac\TracBundle\Entity\Country", inversedBy="addresses", cascade={"persist"})
     * @ORM\JoinColumn(name="country_id", referencedColumnName="id", nullable=true)
     */
    private $country;

    ...
}

/**
 * Country
 *
 * @ORM\Table(name="country")
 * @ORM\Entity
 */
class Country
{
    /**
     * @var integer $countryId
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $countryId;

    /**
     * @ORM\Column(name="name", type="string", length=255)
     */
    private $name;

    /**
     * @ORM\Column(name="code", type="string", length=255)
     */
    private $code;

    ...
}

1表格：

ContactPersonType：

$builder->add('title', 'choice', array('choices'  => array('m' => 'male', 'w' => 'female')));
$builder->add('firstname', 'text');
$builder->add('surname', 'text');
$builder->add('address', new \myBundle\Form\AddressType(), array(
    'data_class' => 'myBundle\Entity\Address'
));

地址类型：

$builder->add('street', 'text');
$builder->add('zip', 'text');
$builder->add('city', 'text');
$builder->add('country', 'entity', array(
    'class' => 'myBundle\Entity\Country',
    'property' => 'name'
));

CountryType：

$builder->add('country', 'entity', array(
    'class' => 'myBundle\Entity\Country',
    'property' => 'name'
));

当我执行表单发布时，控制器将请求数据成功存储在表中。 一切正常！

ContactPersonController：

$form->handleRequest($request);
if($form->isValid()) {

    $contact_person = $form->getData();

    $em->persist($contact_person);
    $em->flush();
}

表中的结果：

contact_person
id, title, firstname, surname, adress_id
1, Mr, Ted, Tester, 1

address
id, street, zip, city, country_id
1, myStreet, 12345, Berlin, 2

country
id, name, code
1, Austria, AT
2, Germany, DE

问题：

当我在会话中存储联系人实体并从另一个控制器调用$ em-> persist（）时，国家/地区映射失败：

ContactPersonController（将联系人对象存储到会话中）：

$form->handleRequest($request);
$session = $request->getSession();
if($form->isValid()) {
    $contactPersons[] = $form->getData();
    //Add to session
    $session->set('contactPersons', $contactPersons);
}

AnotherController：

...

if($form->isValid()) {

    $customer = $form->getData();

    //Customer
    $em->persist($customer);
    $em->flush();

    //Get contact persons from session
    $contactPersons = $session->get('contactPersons');

    //Save contact persons to tables
    if(is_array($contactPersons) && !empty($contactPersons)) {

        foreach($contactPersons as $key => $contactPerson) {
            $em->persist($contactPerson);
            $em->flush();
        }
    }
}

...

表格结果错误

contact_person
id, title, firstname, surname, adress_id
1, Mr, Ted, Tester, 1

address
id, street, zip, city, country_id
1, myStreet, 12345, Berlin, 3

country
id, name, code
1, Austria, AT
2, Germany, DE
3, Germany, DE <= Create a new row... BUT WHY??? it should reference the id 2 by mapping into address (country_id)

感谢您的帮助，

刚铎

Answer 1

当您将理论实体存储在会话中时，它们将与EntityManager分离。 您需要将数据库中已存在的所有实体合并回EntityManager。 这样的事情（必要时检查null）：

    foreach($contactPersons as $key => $contactPerson) {
        $mergedCountry = $em->merge($contactPerson->getAddress()->getCountry());
        $contactPerson->getAddress()->setCountry($mergedCountry);
        $em->persist($contactPerson);
    }
    $em->flush();