Is this possible to join tables in doctrine ORM without using relations?

问题

Suppose there are two tables.

Table X--
Columns:
     id         x_value

Table Y--
Columns:
     id        x_id      y_value

Now I dont want to define relationship in doctrine classes and i want to retrieve some records using these two tables using a query like this:

Select x_value from x, y where y.id="variable_z" and x.id=y.x_id;

I m not able to figure out how to write query like this in doctrine orm

EDIT:

Table structures:

Table 1:

CREATE TABLE IF NOT EXISTS `image` (
  `id` int(11) NOT NULL AUTO_INCREMENT, 
`random_name` varchar(255) NOT NULL,
 `user_id` int(11) NOT NULL,
  `community_id` int(11) NOT NULL,
  `published` varchar(1) NOT NULL,
  PRIMARY KEY (`id`)
 ) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=259 ;

Table 2:

  CREATE TABLE IF NOT EXISTS `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
   `city` varchar(20) DEFAULT NULL,
   `state` varchar(20) DEFAULT NULL,
   `school` varchar(50) DEFAULT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=20 ;

Query I am using:

        $q = new Doctrine_RawSql();

        $q  ->select('{u.*}, {img.*}')
        ->from('users u LEFT JOIN image img ON u.id = img.user_id')
        ->addComponent('u', 'Users u')
        ->addComponent('img', 'u.Image img')
        ->where("img.community_id='$community_id' AND img.published='y' AND u.state='$state' AND u.city='$city
        ->orderBy('img.id DESC')
        ->limit($count+12)  
        ->execute();

Error I am getting:

 Fatal error: Uncaught exception 'Doctrine_Exception' with message 'Couldn't find class
 u' in C:\xampp\htdocs\fanyer\doctrine\lib\Doctrine\Table.php:290 Stack trace: #0 
 C:\xampp\htdocs\fanyer\doctrine\lib\Doctrine\Table.php(240): Doctrine_Table-   >initDefinition() #1 C:\xampp\htdocs\fanyer\doctrine\lib\Doctrine\Connection.php(1127): 
Doctrine_Table->__construct('u', Object(Doctrine_Connection_Mysql), true) #2 
C:\xampp\htdocs\fanyer\doctrine\lib\Doctrine\RawSql.php(425): Doctrine_Connection-
>getTable('u') #3 C:\xampp\htdocs\fanyer\doctrine\models\Image.php(33):    Doctrine_RawSql-
>addComponent('img', 'u.Image imga') #4   C:\xampp\htdocs\fanyer\community_images.php(31): 
  Image->get_community_images_gallery_filter(4, 0, 'AL', 'ALBERTVILLE') #5 {main} thrown      in 
    C:\xampp\htdocs\fanyer\doctrine\lib\Doctrine\Table.php  on line 290

回答1:

Try something like this:---

$q = new Doctrine_RawSql();
$this->related_objects = $q->
        select('{o.name}')->
        from('tagset t1 JOIN tagset t2 ON t1.tag_id = t2.tag_id AND t1.object_id != t2.object_id JOIN object o ON t2.object_id = o.id')->
        addComponent('o','Object o')->
        where('t1.object_id = ?', $this->object->id)->
        groupBy('t2.object_id')->
        orderBy('COUNT(*) DESC')->
        execute();

回答2:

You can write the sql directly to the db driver.You won't get back any hydrated arrays or objects however. But it does come in handy sometimes:

 $sql = "SELECT * FROM... ";        
 $pdo = Doctrine_Manager::connection()->getDbh();       
 $data = $pdo->query($sql)->fetchAll();

回答3:

You can manually alter your Table Class in Symfony 1.4 but this should be done carefully, because you are not linking tables on Database level which normally should happen.

class TableName extends BaseTableName
{
    public function setUp()
    {
        $this->hasOne('LinkedTableName', array(
             'local' => 'link_id',
             'foreign' => 'link_id'));
        parent::setUp();
    }
}

Possible duplicate: doctrine join without relation

来源：https://stackoverflow.com/questions/2203027/is-this-possible-to-join-tables-in-doctrine-orm-without-using-relations

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mysql

doctrine

dql