>我有一个教义迁移,看起来像这样:
<?php
namespace ApplicationMigrations;
use DoctrineORMMappingPushNotification;
use DoctrineDBALMigrationsAbstractMigration;
use SymfonyComponentDependencyInjectionContainerAwareInterface;
use DoctrineDBALSchemaSchema;
/**
* Auto-generated Migration: Please modify to your needs!
*/
class Version20180123103147 extends AbstractMigration implements ContainerAwareInterface
{
private $container;
public function setContainer(ContainerInterface $container = null)
{
$this->container = $container;
}
/**
* @param Schema $schema
*/
public function up(Schema $schema)
{
$em = $this->container->getDoctrine()->getManager();
$tableName = $em->getClassMetadata('AppBundle:PushNotification')->getTableName();
$this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on 'mysql'.');
$this->addSql('ALTER TABLE '.$tableName.' ADD COLUMN last_offset int(11) ');
$this->addSql('ALTER TABLE '.$tableName.' ADD COLUMN failure_count int(11) ');
$this->addSql('ALTER TABLE '.$tableName.' ADD COLUMN is_sent int(11) ');
$this->addSql('ALTER TABLE '.$tableName.' ADD COLUMN send_date datetime ');
}
/**
* @param Schema $schema
*/
public function down(Schema $schema)
{
$em = $this->container->getDoctrine()->getManager();
$tableName = $em->getClassMetadata('AppBundle:PushNotification')->getTableName();
$this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on 'mysql'.');
$this->addSql('ALTER TABLE '.$tableName.' DROP COLUMN last_offset ');
$this->addSql('ALTER TABLE '.$tableName.' DROP COLUMN failure_count ');
$this->addSql('ALTER TABLE '.$tableName.' DROP COLUMN is_sent ');
$this->addSql('ALTER TABLE '.$tableName.' DROP COLUMN send_date ');
}
}
。运行迁移时,我收到一条错误消息,指出Declaration of ApplicationMigrationsVersion20180123103147::setContainer() must be compatible with SymfonyComponentDependencyInjectionContainerAwareInterface::setContainer(SymfonyComponentDependencyInjectionContainerInterface $container = NULL)
此错误似乎不合适,因为我直接从相关接口复制了方法签名。
我在这里缺少一些明显的代码吗?
您似乎正在尝试将container
注入另一个服务,通常强烈建议不要这样做。相反,您可以注入EntityManagerInterface
并使用它。
但是,我确实看到这是一个迁移文件。在给定的代码中没有理由为什么应该在这里,而只是像这样硬编码表名:
$this->addSql('ALTER TABLE push_notification ADD COLUMN last_offset int(11)');
因此,总而言之,您收到该错误的原因是迁移期望将容器的实例传递给您的迁移,但是,由于您未将迁移注册为服务,因此从未发生这种情况。
(sidenote: never register a migration as a service)
我认为您错误的原因只是因为您没有放入使用部分
use SymfonyComponentDependencyInjectionContainerInterface;
事实上,它与没有使用的接口不是同一个原型(不引用 ContainerInterface 的同一类(
尽管如此,前面回答的评论也很严谨!