“This value is not valid” when using “query_builder” on “entity” buildForm on symfony2.1

问题

Here is my problem. I use the buildForm method on symfony 2.1 in order to build my form. With the following code everything works just fine :

$builder->add('combat','entity',array(
                    class' => 'KarateCompetitionBundle:CompetitionCombat',
                    'empty_value' => 'Sélectionner un combat'));

But I want to filter and display only some Combat. That's why I have to use the query_builder option. When i do that i get the This value is not valid error message. Here is the code :

$builder->add('combat','entity',array(
                  'class' => 'KarateCompetitionBundle:CompetitionCombat',
                  'empty_value' => 'Sélectionner un combat',
                  'query_builder' => function(CombatRepository $cr) {
                      return $cr->getAllWithoutBilanQueryBuilder();}));

I reduce at the minimum the code (i.e. no filtering on the getAllWithoutBilanQueryBuildermethod) in order to be able to find the problem.

public function getAllWithoutBilanQueryBuilder(){
    $queryBuilder = $this->getEntityManager()->createQueryBuilder();
    return $queryBuilder->select('c')->from('KarateEntrainementBundle:CompetitionCombat', 'c');

}

I've compared both html code generate on each case and they are the same.

I put a var_dump($object) on the controller after binding the form with the request $form->bind($request) and it appears that when i use the query_builder option the combatis null while it is not null if i don't use it.

I can't manage to understand why ? I found few post on the web with the same issue but none with an answer. Is it possible that there is a symfony issue here or am I doing something wrong ?

回答1:

I had the exact same problem and - in my case - traced it back to Symfony\Bridge\Doctrine\Form\ChoiceList\ORMQueryBuilderLoader.

When the form is validated, the entities are loaded by primary key in ORMQueryBuilderLoader::getEntitiesByIds() by adding an IN() clause to the query builder. In my case, this IN() clause was ineffective and all selectable entities were returned.

This, in turn, caused Symfony\Component\Form\Extension\Core\DataTransformer\ChoicesToValuesTransformer::reverseTransform() to throw a TransformationFailedException, because the number of loaded entities and submitted choices were not the same.

I suppose there's other possible causes for this specific error. Here's what you could try:

Look at the generated query, run it manually and make sure it returns only the selected values
In Symfony\Component\Form\Form, try outputting the caught TransformationFailedException and see where it leads you.
If none of the above seem plausible, add some debug output to Symfony\Component\Form\Extension\Validator\Constraints\FormValidator and see whether you can narrow it down somewhat.

回答2:

As an addition to @mike-b answer: for me failing QueryBuilder statement was ->having('...') query part:

    ...
    'query_builder' => function(EntityRepository $er) use ($pn) {
                    return $er->createQueryBuilder('p')
                                    ->select('p')
                                    ->join('p.product', 'pr')
                                    ->where('p.name = ' . $pn->getId())
                                    ->andWhere("LENGTH(p.value_en) > 1")
                                    ->andWhere("p.value_en != ''")
                                    /* when I remove this - validation passe flawlessly  */
                                    ->having('COUNT(pr.id) > 1')
                                    ->groupBy('p.value_en)
                                    ->orderBy('p.value_en', 'ASC');
    ...

tested with Symfony version 2.3.6

回答3:

I finally managed to make this worked :-)

So here was the fix. On the getAllWithoutBilanQueryBuilder function, I replace

$queryBuilder = $this->getEntityManager()->createQueryBuilder();

$queryBuilder = $this->createQueryBuilder('c');

I don't know what is exactly the difference and why this is now working. But this is working.

Thanks you all for your help.

来源：https://stackoverflow.com/questions/15192735/this-value-is-not-valid-when-using-query-builder-on-entity-buildform-on-sy

标签

symfony

entity

query-builder