我想要实现什么
- 用户可以通过网站上的HTML表单配置Doctrine实体。
- 用户可以定义新实体，以及添加和删除现有实体的字段。（类似于Drupal的内容类型）
- Doctrine实体将根据用户通过Web UI提供的配置获取动态属性。
- 每当实体配置更改时，单个Doctrine实体的单个DB表格将被动态更改; 或者每个单个实体可以使用多个表格（每个新实体字段将拥有自己的表格）。
目前已完成的工作
我已经进行了几天的研究，但没有取得太多成功，但我偶然发现this answer，它似乎与我正在尝试实现的内容相当相关。
I have registered and added the loadClassMetadata listener which maps the field foo:
// src/DynamicMappingTest/AdminBundle/EventListener/MappingListener.php
namespace DynamicMappingTest\AdminBundle\EventListener;
use Doctrine\ORM\Event\LoadClassMetadataEventArgs;
class MappingListener
{
public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs)
{
$classMetadata = $eventArgs->getClassMetadata();
if ($classMetadata->getName() != 'DynamicMappingTest\\AdminBundle\\Entity\\CustomNode')
{
// Not the CustomNode test class. Do not alter the class metadata.
return;
}
$table = $classMetadata->table;
$oldName = $table['name']; // ... or $classMetaData->getTableName()
// your logic here ...
$table['name'] = 'custom_node';
$classMetadata->setPrimaryTable($table);
$reflClass = $classMetadata->getReflectionClass();
dump($reflClass);
// ... or add a field-mapping like this
$fieldMapping = array(
'fieldName' => 'foo',
'type' => 'string',
'length' => 255
);
$classMetadata->mapField($fieldMapping);
}
}
Now, this all works as long as I have the foo property declared in the DynamicMappingTest\AdminBundle\Entity\CustomNode class:
// src/DynamicMappingTest/AdminBundle/Entity/CustomNode.php
namespace DynamicMappingTest\AdminBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* CustomNode
*
* @ORM\Table()
* @ORM\Entity(repositoryClass="DynamicMappingTest\AdminBundle\Entity\CustomNodeRepository")
*/
class CustomNode
{
...
private $foo;
}
Problem
However, there is no way for me to know what properties the users will define for their custom entities. If I remove the foo property from the CustomNode class, the ReflectionClass that I get from the ClassMetadata will naturally not include the foo property and so I get the following exception whenever the mapField() in MappingListener is executed:
ReflectionException: Property DynamicMappingTest\AdminBundle\Entity\CustomNode::$foo does not exist
in vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/RuntimeReflectionService.php at line 80
77. */
78. public function getAccessibleProperty($class, $property)
79. {
80. $reflectionProperty = new ReflectionProperty($class, $property);
81.
82. if ($reflectionProperty->isPublic()) {
83. $reflectionProperty = new RuntimePublicReflectionProperty($class, $property);
Questions
- Is it possible to have fully configurable dynamic Doctrine entities?
- Am I on the right track with my approach? If not, could you suggest an alternative?
- How could I have truly dynamic class properties? Or should I be generating new Doctrine entity PHP classes whenever the users change the entity configuration?
class UserObject::$fields、class UserField::$dataType等。 - Will B.