当绑定到同一形式的两个不同实体中的持久化数据时，我收到了"国家不应为空"的消息。有什么原因吗？
关系：Country (1) -> (M) League
第1版控制器
$submission = $form->getData();
$countryData = $submission['country'];
$leagueData = $submission['league'];
$em = $this->getDoctrine()->getManager();
$country = new Country();
$country->setCode($countryData->getCode());
$em->persist($country);
$league = new League();
$league->setName($leagueData->getName());
$league->setCountry($country);
$em->persist($league);
$em->flush();
控制器版本2
$submission = $form->getData();
$countryData = $submission['country'];
$leagueData = $submission['league'];
$em = $this->getDoctrine()->getManager();
$country = new Country();
$country->setCode($countryData->getCode());
$league = new League();
$league->setName($leagueData->getName());
$league->setCountry($country);
$em->persist($country);
$em->persist($league);
$em->flush();
表单类型
$builder
->setMethod('POST')
->setAction($options['action'])
->add('country', new CountryType())
->add('league', new LeagueType())
->add('button', 'submit', array('label' => 'Submit'))
;
国家
class Country
{
protected $id;
protected $code;
/**
* @ORM'OneToMany(targetEntity="League", mappedBy="country", cascade={"persist"})
*/
protected $league;
}
联赛
class League
{
protected $id;
protected $name;
/**
* @ORM'ManyToOne(targetEntity="Country", inversedBy="league", cascade={"persist"})
* @ORM'JoinColumn(name="country_id", referencedColumnName="id", nullable=false)
* @Assert'NotBlank(message="The Country should not be blank.")
*/
protected $country;
}
如上所述，我必须更新我的LeagueType，所以它就是这样开始工作的。我之所以痛苦，是因为我有时会单独使用LeagueType作为一个表单，或者与其他表单类型一起在一个表单中使用，所以当它以组合形式使用时，我现在必须传递一个参数。首选上面的Controller Ver 1。
单独使用时：
new LeagueType();
以组合形式使用时：
new LeagueType(true);
联赛类型
class LeagueType extends AbstractType
{
private $cascadeCountry;
public function __construct($cascadeCountry = false)
{
$this->cascadeCountry = $cascadeCountry;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->setAction($options['action'])
->setMethod('POST')
->add('name', 'text', array('label' => 'Name'))
;
//Used when forms are combined
if ($this->cascadeCountry === true) {
$builder
->add('country', new CountryType())
;
//Used when the form is used on it own
} else {
$builder
->add('country', 'entity', array(
'label' =>'Country',
'class' => 'FootballTeamBundle:Country',
'property' => 'name',
'multiple' => false,
'expanded' => false,
'empty_value' => '',
'query_builder' =>
function (EntityRepository $repo) {
return $repo->createQueryBuilder('c')->orderBy('c.name', 'ASC');
}
))
;
}
$builder
->add('button', 'submit', array('label' => 'Submit'))
;
}
}