php - Doctrine - 动态创建模型/实体

Question

如何基于抽象实体类在学说中动态创建实体？表名必须不同。例如

// abstract entity model
class Transport {
   // $name, $type and other columns
}

创作看起来像：

class TransportManager {

public function registerTransport($name) {
$car = ...
// here create table $name if does not exist, 
// and if it exists then just
// return Car instance of this $name table
return $car;

}

用法：

$car = $transportManager->registerTransport('car');
$airplain = $transportManager->registerTransport('airplain');
$train = $transportManager->registerTransport('train');
$helicopter = $transportManager->registerTransport('helicopter');

原因？我有几个（> 10）具有相同结构的表，我想将所有数据保存在单独的表中，以防止每个表的加载

Answer 1

I'd try something like this, although not exactly the approach you were trying:

$metadata = $cmf->getMetadataFor('YourBundle:Transport');
$metadata->setTableName('car');
//work with car
$metadata->setTableName('airplain');
//work with airplain

Hope it serves.

Answer 2

使用一张桌子。通过适当的索引，它不应该比使用多个表慢，即使它很大。

Answer 3

Doctrine 支持继承：http ://docs.doctrine-project.org/en/2.0.x/reference/inheritance-mapping.html

您也可以批量生成新实体，但这取决于您的工作流程（例如，为新实体创建代码、生成迁移、执行迁移等）