Symfony2 form validation for multiple field require only one

Question

I have 5 fields in one form which is as below:

class ItempriceFormType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {

    $builder->add('pergramprice', 'text', array('required' => false))
            ->add('eighthprice', 'text', array('required' => false))
            ->add('quarterprice', 'text', array('required' => false))
            ->add('halfprice', 'text', array('required' => false))
            ->add('ounceprice', 'text', array('required' => false))
    ;
}

public function setDefaultOptions(OptionsResolverInterface $resolver) {
    $resolver->setDefaults(array(
        'data_class' => 'Acme\FrontBundle\Entity\Itemprice',
    ));
}

public function getName() {
    return 'items_price';
}

}

I want to validate only one field means require only one field out of 5 fields. So how can I achieve this with symfony 2 validations.

Thanks in advance.

M Khalid Junaid · Accepted Answer · 2015-08-04 11:52:26Z

you can use custom validator for your validation based on multiple fields, in your Itemprice entity define @Assert\Callback annotation and check if all price fields are empty then show error

use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\ExecutionContextInterface;
/**
 * @Assert\Callback(methods={"checkPriceValidation"})
 */
class Itemprice
{
    public function checkPriceValidation(ExecutionContextInterface $context)
    {
        $pergramprice = $this->getPergramprice();
        $eighthprice = $this->getEighthprice();
        $quarterprice = $this->getQuarterprice();
        $halfprice = $this->getHalfprice();
        $ounceprice = $this->getOunceprice();
        if(
        empty($pergramprice)
        && empty($eighthprice)
        && empty($quarterprice)
        && empty($halfprice)
        && empty($ounceprice)
        ){
            $context->addViolationAt('pergramprice', 'Please enter atleast one price');
        }
    }
}

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