Question

我想使用ZF2 db transaction来更新多个表。通常情况下，我会通过类似的方式对单个表进行交易：

 $connection = null;
 try {
        $connection = $this->tableGateway->getAdapter()->getDriver()->getConnection();
        $connection->beginTransaction();
        $this->tableGateway->insert($data);
        $connection->commit();
     }
  catch (Exception $e) {
       if ($connection instanceof \Zend\Db\Adapter\Driver\ConnectionInterface) {
          $connection->rollback();
       }
  }

现在我想在一个事务中更新两个表。在ZF1中，我通过创建table2类的实例并在同一事务中调用其适当的方法来完成此操作。但由于我不知道在模型中调用另一个模型类的方法，我不能像ZF1那样做。我需要这个用于简单的任务，例如在输入新账单（发票）时向tbl_invoice添加新行并更新tbl_runno表的发票运行编号。

Answer 1

在您的控制器中，您可以：

$db = $this->getServiceLocator()->get('Zend\Db\Adapter\Adapter');
$con = $db->getDriver()->getConnection();
$con->beginTransaction();
try {
    //get tables and do sth
    $con->commit();
} catch (Exception $e) {
    $con->rollback();
}

Answer 2

使用DataMapper设计模式。 Pattern TableGateway用于将数据投影到单个表。

http://akrabat.com/development/objects-in-the-model-layer
http://akrabat.com/php/objects-in-the-model-layer-part-2
http://www.slideshare.net/aaronsaray/midwest-php-2013

https://leanpub.com/zendframework2-en 你可以使用这样的东西：

namespace ScContent\Mapper;

use Zend\Db\Sql\Sql;
use Zend\Db\Sql\Select;
use Zend\Db\Sql\SqlInterface;
use Zend\Db\Sql\PreparableSqlInterface;

use Zend\Db\Adapter\AdapterInterface;
use Zend\Db\Adapter\Driver\ResultInterface;

use Zend\Stdlib\Hydrator\ClassMethods;
use Zend\StdLib\Hydrator\HydratorInterface;

abstract class AbstractDbMapper
{
    /**
     * @var string
     */
    const JoinInner = Select::JOIN_INNER;

    /**
     * @var string
     */
    const JoinLeft = Select::JOIN_LEFT;

    /**
     * @var string
     */
    const JoinRight = Select::JOIN_RIGHT;

    /**
     * @var Zend\Db\Adapter\AdapterInterface
     */
    protected $_adapter;

    /**
     * @var Zend\Db\Sql\SqlInterface
     */
    protected $_sql;

    /**
     * @var Zend\Stdlib\HydratorInterface
     */
    protected $_hydrator;

    /**
     * @var array
     */
    protected $_tables = array();

    /**
     * @param Zend\Db\Adapter\AdapterInterface $adapter
     */
    public function setAdapter(AdapterInterface $adapter)
    {
        $this->_adapter = $adapter;
    }

    /**
     * @return Zend\Db\Adapter\AdapterInterface
     */
    public function getAdapter()
    {
        if(!$this->_adapter instanceof AdapterInterface) {
            throw new Exception('Adapter is not installed.');
        }
        return $this->_adapter;
    }

    /**
     * @param Zend\Db\Sql\SqlInterface $sql
     */
    public function setSql(SqlInterface $sql)
    {
        $this->_sql = $sql;
    }

    /**
     * @return Zend\Db\Sql\SqlInterface
     */
    public function getSql()
    {
        if(!$this->_sql instanceof SqlInterface) {
            $this->_sql = new Sql($this->getAdapter());
        }
        return $this->_sql;
    }

    /**
     * @param Zend\Stdlib\HydratorInterface $hydrator
     */
    public function setHydrator(HydratorInterface $hydrator)
    {
        $this->_hydrator = $hydrator;
    }

    /**
     * @return Zend\Stdlib\HydratorInterface
     */
    public function getHydrator()
    {
        if(!$this->_hydrator instanceof HydratorInterface) {
            $this->_hydrator = new ClassMethods();
        }
        return $this->_hydrator;
    }

    /**
     * @param string $alias
     * @param string $name
     */
    public function setTable($alias, $name)
    {
        $this->_tables[$alias] = $name;
    }

    /**
     * @param string $alias
     * @throws Exception
     * @return string
     */
    public function getTable($alias)
    {
        if(!array_key_exists($alias, $this->_tables)) {
            throw new Exception(sprintf("Unknown table alias '%s'.", $alias));
        }
        return $this->_tables[$alias];
    }

    /**
     * @return int|null|false
     */
    protected function lastInsertId()
    {
        return $this->adapter->getDriver()->getConnection()->getLastGeneratedValue();
    }

    /**
     * @param void
     * @return void
     */
    protected function beginTransaction()
    {
        $this->getAdapter()->getDriver()->getConnection()->beginTransaction();
    }

    /**
     * @param void
     * @return void
     */
    protected function commit()
    {
        $this->getAdapter()->getDriver()->getConnection()->commit();
    }

    /**
     * @return bool
     */
    protected function inTransaction()
    {
        return $this->getAdapter()->getDriver()
            ->getConnection()->getResource()->inTransaction();
    }

    /**
     * @param void
     * @return void
     */
    protected function rollBack()
    {
        $this->getAdapter()->getDriver()->getConnection()->rollBack();
    }

    /**
     * @param Zend\Db\Sql\PreparableSqlInterface $sqlObject
     * @return Zend\Db\Adapter\ResultInterface
     */
    protected function execute(PreparableSqlInterface $sqlObject)
    {
        return $this->getSql()->prepareStatementForSqlObject($sqlObject)->execute();
    }

    /**
     * @param Zend\Db\Adapter\ResultInterface $source
     * @return array
     */
    protected function toArray(ResultInterface $source)
    {
        $result = array();
        foreach($source as $item) {
            $result[] = $item;
        }
        return $result;
    }

    /**
     *
     */
    protected function toString(SqlInterface $sqlObject)
    {
        return $this->getSql()->getSqlStringForSqlObject($sqlObject);
    }
}

使用示例：

<?php  


namespace ScContent\Mapper;

use Zend\Db\Adapter\AdapterInterface;

class ContentMapper extends AbstractDbMapper
{
    /**
     * @var string
     */
    const ContentTableAlias = 'contentalias';

    /**
     * @var string
     */
    const UsersTableAlias = 'usersalias';

    /**
     * @param AdapterInterface $adapter
     */
    public function __construct(AdapterInterface $adapter) {
        $this->setAdapter($adapter);
    }

    /**
     * @var array
     */
    protected $_tables = array(
        self::ContentTableAlias => 'sc_content',
        self::UsersTableAlias   => 'sc_users'
    );

    /**
     * @param integer $id
     * @return null | array
     */
    public function findById($id)
    {
        $select = $this->getSql()->select()
            ->from(array('content' => $this->getTable(self::ContentTableAlias)))
            ->join(
                array('users' => $this->getTable(self::UsersTableAlias)),
                'content.author = users.user_id',
                array('username'),
                self::JoinInner
            )
            ->where(array('`content`.`id` = ?' => $id));
        return $this->execute($select)->current();
    }
}

ZF2 - 更新多个表的数据库事务

2 个答案: