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XML中的Doctrine类继承

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我'm trying to setup class inheritance using the Doctrine 2 ORM, but am getting errors (even when following their examples). I'm使用Symfony 2沙箱中的控制台 . 这个简单的例子使用了类 Person 和 Employee ; Employee 扩展 Person .

我在尝试生成实体时遇到的错误是：

[Doctrine\ORM\Mapping\MappingException]

Entity class 'Employee' used in the discriminator map of class 'Application\MyBundle\Entity\Person' does not exist.

正在尝试的XML如下：

Person

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xsi="http://www.w3.org/2001/XMLSchema-instance"
                  schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

<entity name="Application\MyBundle\Entity\Person" inheritance-type="SINGLE_TABLE">
    <change-tracking-policy>DEFERRED_IMPLICIT</change-tracking-policy>
    <id name="id" type="integer" column="id">
        <generator strategy="AUTO"/>
    </id>

    <discriminator-column name="discr" type="string" />

    <discriminator-map>
        <discriminator-mapping value="employee" class="Employee" />
    </discriminator-map>

    <lifecycle-callbacks/>
</entity>

</doctrine-mapping>

Employee

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xsi="http://www.w3.org/2001/XMLSchema-instance"
                  schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

<entity name="Application\MyBundle\Entity\Employee">
    <change-tracking-policy>DEFERRED_IMPLICIT</change-tracking-policy>
    <id name="id" type="integer" column="id">
        <generator strategy="AUTO"/>
    </id>
    <lifecycle-callbacks/>
</entity>

</doctrine-mapping>

似乎很多人不使用XML来配置他们的Doctrine实体（大多数示例都使用PHP注释），但它似乎对我来说最合乎逻辑，所以我想知道如何正确地执行它 . 有没有其他人有这个问题，或知道解决方案？

完整的异常跟踪如下：

Exception trace:
 () at C:\SVN\Symfony\symfony-sandbox\src\vendor\doctrine\lib\Doctrine\ORM\Mappi
ng\MappingException.php:187
 Doctrine\ORM\Mapping\MappingException::invalidClassInDiscriminatorMap() at C:\S
VN\Symfony\symfony-sandbox\src\vendor\doctrine\lib\Doctrine\ORM\Mapping\ClassMet
adataInfo.php:1465
 Doctrine\ORM\Mapping\ClassMetadataInfo->setDiscriminatorMap() at C:\SVN\Symfony
\symfony-sandbox\src\vendor\doctrine\lib\Doctrine\ORM\Mapping\Driver\XmlDriver.p
hp:98
 Doctrine\ORM\Mapping\Driver\XmlDriver->loadMetadataForClass() at C:\SVN\Symfony
\symfony-sandbox\src\vendor\doctrine\lib\Doctrine\ORM\Mapping\Driver\DriverChain
.php:75
 Doctrine\ORM\Mapping\Driver\DriverChain->loadMetadataForClass() at C:\SVN\Symfo
ny\symfony-sandbox\src\vendor\doctrine\lib\Doctrine\ORM\Mapping\ClassMetadataFac
tory.php:280
 Doctrine\ORM\Mapping\ClassMetadataFactory->loadMetadata() at C:\SVN\Symfony\sym
fony-sandbox\src\vendor\doctrine\lib\Doctrine\ORM\Mapping\ClassMetadataFactory.p
hp:178
 Doctrine\ORM\Mapping\ClassMetadataFactory->getMetadataFor() at C:\SVN\Symfony\s
ymfony-sandbox\src\vendor\doctrine\lib\Doctrine\ORM\Mapping\ClassMetadataFactory
.php:125
 Doctrine\ORM\Mapping\ClassMetadataFactory->getAllMetadata() at C:\SVN\Symfony\s
ymfony-sandbox\src\vendor\symfony\src\Symfony\Bundle\DoctrineBundle\Command\Doct
rineCommand.php:143
 Symfony\Bundle\DoctrineBundle\Command\DoctrineCommand->getBundleMetadatas() at
C:\SVN\Symfony\symfony-sandbox\src\vendor\symfony\src\Symfony\Bundle\DoctrineBun
dle\Command\GenerateEntitiesDoctrineCommand.php:77
 Symfony\Bundle\DoctrineBundle\Command\GenerateEntitiesDoctrineCommand->execute(
) at C:\SVN\Symfony\symfony-sandbox\src\vendor\symfony\src\Symfony\Component\Con
sole\Command\Command.php:150
 Symfony\Component\Console\Command\Command->run() at C:\SVN\Symfony\symfony-sand
box\src\vendor\symfony\src\Symfony\Component\Console\Application.php:184
 Symfony\Component\Console\Application->doRun() at C:\SVN\Symfony\symfony-sandbo
x\src\vendor\symfony\src\Symfony\Bundle\FrameworkBundle\Console\Application.php:
74
 Symfony\Bundle\FrameworkBundle\Console\Application->doRun() at C:\SVN\Symfony\s
ymfony-sandbox\src\vendor\symfony\src\Symfony\Component\Console\Application.php:
113
 Symfony\Component\Console\Application->run() at C:\SVN\Symfony\symfony-sandbox\
app\console:11
xml orm symfony doctrine2

3 回答

  • 0

    在定义鉴别器时，您应该使用完整的类名（带名称空间） .

    喜欢：

    <discriminator-map>
    <discriminator-mapping value="employee" class="Application\MyBundle\Entity\Employee" />
</discriminator-map>
    回复于
  • 5

    如果类包含在与应用鉴别器映射的实体类相同的命名空间中，则鉴别器映射中的类的名称不需要完全限定 .

    6.2. Single Table Inheritance

    回复于
  • 2

    我得到了同样的错误 .

    我想出了该怎么做：

    在您的示例中，您必须已生成“员工”实体 .

    • 删除Person中的继承并在Employee中添加id

    • doctrine：generate：entities

    • 定义xmls，因为它们在开始时

    • doctrine：generate：entities

    为我工作 .

    回复于

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