错误:尝试使用Doctrine2访问PostgreSQL时，未定义表

我想在Zend 2应用程序中使用Doctrine 2访问PostgreSQL数据库，但我得到了一个错误，即我想要访问的表没有定义。

对MySQL数据库进行相同的访问效果良好。

我的条令配置（local.php）是：

return array(
 'doctrine' => array(
    'connection' => array(
        'orm_default' => array(
            // MySQL - Config
//                 'driverClass' => 'Doctrine'DBAL'Driver'PDOMySql'Driver',
//                 'params' => array(
//                     'host'     => '192.168.1.100',
//                     'port'     => '3306',
//                     'user'     => 'user',
//                     'password' => 'password',
//                     'dbname'   => 'mydb',
//                     'charset'  => 'utf8',
//                 ),
            // PostgreSQL
            'driverClass' => 'Doctrine'DBAL'Driver'PDOPgSql'Driver',
            'params' => array(
                    'host'     => '192.168.1.100',
                    'port'     => '5432',
                    'user'     => 'user',
                    'password' => 'password',
                    'dbname'   => 'mydb',
                    'charset'  => 'utf8',
            ),
        ),
    ),
  ),
);

我的控制器试图显示实体"马"：

class HorsesController extends AbstractActionController
{
  /**
   * @var Doctrine'ORM'EntityManager
   */
  protected $em;
  public function getEntityManager()
  {
    if (null === $this->em) {
        $this->em = $this->getServiceLocator()->get('doctrine.entitymanager.orm_default');
    }
    return $this->em;
  }
  /**
   * The default action - show the home page
   */
  public function indexAction()
  {
    $id = (int)$this->getEvent()->getRouteMatch()->getParam('id');
    $horse = $this->getEntityManager()->find('Doctrine2mapper'Entity'Horse', $id);
    return new ViewModel(array(
            'horse' => $horse,
    ));
  }
}

实体马是：

use Doctrine'ORM'Mapping as ORM;
use Doctrine'Common'Collections'ArrayCollection;
use Doctrine'Common'Collections'Collection;
use Zend'Form'Annotation; // !!!! Absolutely neccessary
use Zend'Db'Sql'Ddl'Column'BigInteger;
/**
 * Horses
 *
 * @ORM'Table(name="Horse")
 * @ORM'Entity(repositoryClass="Doctrine2mapper'Entity'Repository'HorseRepository")
 * @Annotation'Name("Horse")
 * @Annotation'Hydrator("Zend'Stdlib'Hydrator'ClassMethods")
 */
class Horse
{
    /**
     * @var integer
     *
     * @ORM'Column(name="id", type="integer")
     * @ORM'Id
     * @ORM'GeneratedValue(strategy="IDENTITY")
     * @Annotation'Exclude()
     */
    private $id;
    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }
.
.
.
(many attributes, getter and setter)

当试图访问PostgreSQL时，我得到了这个错误：

An exception occurred while executing 'SELECT t0.id AS id1, ...
FROM Horse t0 WHERE t0.id = ?' with params [1]:
SQLSTATE[42P01]: Undefined table: 7 ERROR:  relation "horse" does not exist
LINE 1: ...ated AS created29, t0.modified AS modified30 FROM Horse t0 W...

我有一个PostgreSQL数据库"mydb"，模式为"public"，表为"Horse"

-- Table: "Horse"
CREATE TABLE "Horse"
(
  id serial NOT NULL,
  .
  .
  . 
);

存在，并且可以使用pgAdminIII进行访问。

欢迎任何帮助！

致以最良好的问候rholtermann