Doctrine Query Builder Delete Statement

问题

I am using Symfony2, i must use the Doctrine QueryBuilder ( http://docs.doctrine-project.org/en/latest/reference/query-builder.html ) The documentation does not have an example for the delete or update statement.

My entity is :

  object(stdClass)[417]
        public '__CLASS__' => string 'Les\DataBundle\Entity\News' (length=26)
        public 'id' => int 1
        public 'restoId' => int 1
        public 'category' => string 'dessert' (length=7)
        public 'text' => string 'jlkdjsalkdj sa' (length=14)
        public 'dateCreated' => string 'DateTime' (length=8)
        public 'dateModified' => null

I am trying to delete a row in the database, but i keep getting the error:

   [Semantical Error] line 0, col 7 near 'News WHERE n.id': Error: Class 'News' is not defined.

My query is :

   $newsID =2 ;
    $qd = $repository->createQueryBuilder('n');
    $qd->delete('n')
        ->where('n.id = :id')
        ->setParameter('id',$newsID);
    $query = $qd->getQuery();
    $result = $query->getResult();

And would the update statement have the same structure?

回答1:

For the delete statement is different from the select, you don't specify the column name for the delete unlike select.

Corrected Code

  $qd = $repository->createQueryBuilder('n');
    $qd->delete()
        ->where('n.id = :id')
        ->setParameter('id',$newsID);
    $query = $qd->getQuery();
    $result = $query->getResult();

Another Format

    $query = $this->getDoctrine()->getManager()->createQuery('delete FROM LesDataBundle:News n where n.id = '.$newsID);
    $result = $query->getResult();

For the Update Statement it is :

    $qd = $repository->createQueryBuilder('n');
    $qd->delete()
    $qd->update()
        ->set('n.text' , ':text')
        ->where('n.id = :id')
        ->setParameters( array('id'=> $newsID, 'text' => 'Hello World') );
    $query = $qd->getQuery();
    $result = $query->getResult();

来源：https://stackoverflow.com/questions/24212370/doctrine-query-builder-delete-statement

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php

symfony

doctrine

query-builder