symfony2 form querybuilder with parameters

You should set the parameter separately like so:

->add( 'weeks', 'entity', array(    'class' => 'MV\CaravanBundle\Entity\CaravanRow',    'property' => 'line',    'query_builder' => function(EntityRepository $er ) use ( $caravan ) {        return $er->createQueryBuilder('w')                  ->orderBy('w.dateFrom', 'ASC')                  ->where('w.caravan = ?1')                  ->andWhere('w.visible = 1')                  ->andWhere('w.booked = 0')                  ->setParameter(1, $caravan);}

You can either use an integer or string, but the syntax is slightly different for each. See the docs

I recently ran across almost the same problem. Only difference was the 'query_builder' option has to be set inside 'setDefaultOptions'. Basicly the form is created like this:

$builder->add('field', 'query_type', array('id' => 1));

The 'query_type' class looks like this:

class QueryType extends AbstractType{     public function setDefaultOptions(OptionsResolverInterface $options)     {              $resolver->setRequired(array('id'));              $resolver->setNormalizers(array(                  'query_builder' => function (Options $options, $configs) {                          return function (EntityRepository $er) use ( $options ) {                              return $er->getSomething( $options['id'] );                       };                  },              ));     }}

I use the setNormalizers function to access my $options array and from there on i can call the querybuilder with parameters.

Hope this is useful for someone!