1

我是新来的，对 symfony 2 很陌生。

我尝试构建一个从实体“进程”继承的实体“邮件进程”。这是我的实体定义：

// src/MW/TodoBundle/Entity/Process.php
namespace MW\TodoBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity 
 * @ORM\InheritanceType("JOINED")
 * @ORM\DiscriminatorColumn(name="process_type", type="string")
 * @ORM\DiscriminatorMap({"mailprocess" = "MailProcess", "process" = "Process"})
 * @ORM\Table(name="process")
 * @ORM\HasLifecycleCallbacks 
 */
class Process
{

    /**
     *
     * @ORM\Id
     * @ORM\Column(type="integer", unique=true)
     * @ORM\GeneratedValue(strategy="AUTO") 
     */
    protected $id;

    /**
     *
     * @ORM\Column(type="string") 
     */
    protected $title;

    /**
     *
     * @ORM\Column(type="datetime") 
     */
    protected $created;



    /**
     *
     * @ORM\Column(type ="text", nullable= true)
     */
    protected $comment;
    protected $options;

    // Getters and Setters
}

// src/MW/TodoBundle/Entity/MailProcess.php
namespace MW\TodoBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use MW\TodoBundle\Entity\Process;

/**
 *
 * @ORM\Entity
 * @ORM\Table(name="process_mailprocess")
 */
class MailProcess extends Process
{

    /**
     *
     * @ORM\Column(type="string") 
     */
    protected $from;

    /**
     *
     * @ORM\Column(type="string") 
     */
    protected $to;

    /**
     *
     * @ORM\Column(type="string", nullable=true) 
     */
    protected $subject;

    /**
     *
     * @ORM\Column(type="text", nullable=true) 
     */
    protected $message;
}

您可以看到使用的 ORM 类表继承：两个表 'process' 和 'process_mailprocess' 带有鉴别器列 'process_type'。

我确实使用 'php app/console dictionary:schema:update --force' 将架构更新到我的 MySQL 数据库，这工作正常。

但是还有我的数据装置：我在这里将它们剥离为一个，但请放心，我还有其他装置也在测试运行良好的实体“进程”。

// src/MW/TodoBundle/DataFixtures/ORM/ProcessFixtures.php

namespace MW\TodoBundle\DataFixtures\ORM;

use Doctrine\Common\DataFixtures\FixtureInterface;
use Doctrine\Common\Persistence\ObjectManager;
use MW\TodoBundle\Entity\Process;
use MW\TodoBundle\Entity\MailProcess;

class ProcessFixtures implements FixtureInterface
{

    public function load(ObjectManager $manager)
    {
        $mp1= new MailProcess();
        $mp1->setTitle("Invoice from heaven")
            ->setComment("sitebot: Irgendwer will was von euch!")
            ->setCreated(new \DateTime())
            ->setFrom("m")
            ->setTo("m")
            ->setSubject("m")
            ->setMessage("m");
        $manager->persist($mp1);
        $manager->flush();
    }
}

唉，执行“php app/console 原则：fixtures:load”确认“y”清除让我

  [Doctrine\DBAL\DBALException]
  An exception occurred while executing 'INSERT INTO process_mailprocess (id, from, to, subject, message) VALUES (?,
  ?, ?, ?, ?)' with params {"1":28,"2":"m","3":"m","4":"m","5":"m"}:

  SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your   SQL syntax; check the manual that
   corresponds to your MySQL server version for the right syntax to use near 'from, to, subject, message) VALUES ('28
  ', 'm', 'm', 'm', 'm')' at line 1






  [PDOException]
  SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that
   corresponds to your MySQL server version for the right syntax to use near 'from, to, subject, message) VALUES ('28
  ', 'm', 'm', 'm', 'm')' at line 1

我看不出有什么问题，此外，Doctrine 和 Symfony 创建了 SQL 查询。谁能指出我在这里做错了什么？这对我来说真是令人头疼。

4

1 回答 1

0

我认为您会收到语法错误，因为from它是 MySql 中的保留字。您可以在注释中设置列名并正确引用它。

/**
 *
 * @ORM\Column(type="string", name="`from`") 
 */
protected $from;
于 2013-03-08T20:57:37.287 回答