prodcutsub.php

<?php

namespace Test\advFormBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * ProductSub
 *
 * @ORM\Table()
 * @ORM\Entity
 */
class ProductSub
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\ManyToOne(targetEntity="ProductGrp", inversedBy = "ProdcutSub")
     *
     */
    private $productgrp;

    /**
     * @var string
     *
     * @ORM\Column(name="productsub", type="string", length=64)
     */
    private $productsub;


    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Get productsub
     *
     * @return string
     */
    public function getProductsub()
    {
        return $this->productsub;
    }


    /**
     * @return mixed
     */
    public function getProductgrp()
    {
        return $this->productgrp;
    }
}

product.php

<?php

namespace Test\advFormBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Product
 *
 * @ORM\Table()
 * @ORM\Entity(repositoryClass="Test\advFormBundle\Entity\ProductRepository")
 */
class Product
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\ManyToOne(targetEntity="productsub", inversedBy= "Product")
     */
    private $productsub;

    /**
     * @var string
     *
     * @ORM\Column(name="product", type="string", length=64)
     */
    private $product;


    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Get product
     *
     * @return string
     */
    public function getProduct()
    {
        return $this->product;
    }

    /**
     * @return mixed
     */
    public function getProductsub()
    {
        return $this->productsub;
    }

}

productgrp.php

<?php

namespace Test\advFormBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * ProductGrp
 *
 * @ORM\Table()
 * @ORM\Entity
 */
class ProductGrp
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="productgrp", type="string", length=64, unique = true)
     */
    private $productgrp;


    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set productgrp
     *
     * @param string $productgrp
     *
     * @return ProductGrp
     */
    public function setProductgrp($productgrp)
    {
        $this->productgrp = $productgrp;

        return $this;
    }

    /**
     * Get productgrp
     *
     * @return string
     */
    public function getProductgrp()
    {
        return $this->productgrp;
    }
}

productype.php

<?php


namespace Test\advFormBundle\Form;

use Doctrine\ORM\EntityManager;
use Doctrine\ORM\EntityRepository;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormInterface;
use Test\advFormBundle\Entity\ProductSub;
use Test\advFormBundle\Entity\Product;

use Symfony\Component\OptionsResolver\OptionsResolver;


class productype extends AbstractType{

    protected $em;

    public function __construct(EntityManager $em){
    $this->em = $em;
}
    public function buildForm(FormBuilderInterface $builder, array $options){

        $builder->add('productgrp','entity',array(
            'class'=>'TestadvForm:ProductGrp',
            'choice_label'=>'productgrp',
            'query_builder'=>function(EntityRepository $er){
                return $er->createQueryBuilder('pgrp')
                            ->orderBy('pgrp.productgrp','ASC');
            }
        ));


        $builder->add('search','submit');

        $builder->addEventListener(FormEvents::PRE_SET_DATA, array($this,'onPreSetData'));
        $builder->addEventListener(FormEvents::PRE_SUBMIT, array($this, 'onPreSubmit'));

    }

    protected function addElements(FormInterface $form, ProductSub $productsub){

        $search = $form->get('search');
        $form->remove('search');



        $form->add('productsub','entity',array(
            'data'=> $productsub,
            'empty_value'=>'--Choose product sub category--',
            'class'=>'TestadvForm:ProductSub',
            'mapped'=> false
        ));


    }

    public function onPreSubmit(FormEvent $event){
        $form = $event->getForm();
        $data_productsub = $event->getData();


        $productsub = $this->em->getRepository('TestadvFormBundle:ProductSub')->find($data_productsub['productsub']);
        $this->addElements($form, $productsub);
    }

    public function onPreSetData(FormEvent $event){
        $product = $event->getData();
        $form = $event->getForm();

        $productsub = $product->getProductsub() ? $product->getProductsub()->getProductsub() : null;

        $this->addElements($form,$productsub);
    }

    public function configureOptions(OptionsResolver $resolver)    {
        $resolver->setDefaults(array(
            'data_class' => 'Test\advFormBundle\Entity\Product'
        ));
    }



    public function getName()
    {
        return "product_type";
    }
}