未知列类型“将varchar”

Question

使用学说，我被介绍了以下错误：

[2016-09-14 21:24:44] request.CRITICAL: Uncaught PHP Exception Doctrine\DBAL\DBALException: "Unknown column type "varchar" requested. Any Doctrine type that you use has to be registered with \Doctrine\DBAL\Types\Type::addType(). You can get a list of all the known types with \Doctrine\DBAL\Types\Type::getTypeMap(). If this error occurs during database introspection then you might have forgot to register all database types for a Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot some mapping information." at /var/www/project/apps/ProjectName/trunk/vendor/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php line 114 {"exception":"[object] (Doctrine\\DBAL\\DBALException(code: 0): Unknown column type \"varchar\" requested. Any Doctrine type that you use has to be registered with \\Doctrine\\DBAL\\Types\\Type::addType(). You can get a list of all the known types with \\Doctrine\\DBAL\\Types\\Type::getTypeMap(). If this error occurs during database introspection then you might have forgot to register all database types for a Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot some mapping information. at /var/www/project/apps/ProjectName/trunk/vendor/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php:114)"} [] 

相关类看起来如此

<?php 

namespace Project\DBALBundle\Entity\Url; 

use Doctrine\ORM\Mapping as ORM; 
use JMS\Serializer\Annotation as JMSS; 

/** 
* Profile 
* 
* @ORM\Table(name="Profile") 
* @ORM\Entity(repositoryClass="Project\DBALBundle\Entity\Url\ProfileRepository") 
*/ 
class ProfileRepository { 
    /** 
    * @var string $id 
    * 
    * @ORM\Column(name="id", type="integer", length=11, nullable=false) 
    * @ORM\Id 
    * @ORM\GeneratedValue(strategy="AUTO") 
    */ 
    private $id; 
    /** 
    * @var string $label 
    * 
    * @ORM\Column(name="label", type="string", length=50, nullable=false) 
    */ 
    private $label; 

    /** 
    * @return string 
    */ 
    public function getId() 
    { 
     return $this->id; 
    } 

    /** 
    * @param string $id 
    */ 
    public function setId($id) 
    { 
     $this->id = $id; 
    } 

    /** 
    * @return string 
    */ 
    public function getLabel() 
    { 
     return $this->label; 
    } 

    /** 
    * @param string $label 
    */ 
    public function setLabel($label) 
    { 
     $this->label = $label; 
    } 

    public function __toString() 
    { 
     return $this->label; 
    } 
} 

有了上面的类和注释定义的映射，我收到错误。但是，如果我将字段private $label更改为private $labelField并更新关联的引用，则一切正常，数据按预期访问。

就我已经能够搜索，private $label没有什么特别之处。它不是一个保留的关键字，我没有发现任何关于它的任何特别的内容，无论是使用PHP本身还是特定的Doctrine。那么为什么这会打破？

Answer 1

我的猜测是它是一个缓存问题。你有可能试图在某些时候这个代码，

/** 
* @var string $label 
* 
* @ORM\Column(name="label", type="varchar", length=50, nullable=false) 
*/ 
private $label; 

这个类已经得到了由opcache（或类似）的缓存。 Opcache不注意注释（它只是一个注释），所以无论你在注释中改变了什么，它仍然使用这个缓存版本的代码。

但是，当您更改属性名称时，它意识到它是较新版本的类并再次解析注释（这就是为什么labelField代码有效）。

但这只是一个猜测。我会尝试使用Xdebug进行调试以找出确切的问题。

P.S.学说2.3版本相当陈旧，不是吗？