Symfony 2 : Save json and display value

Question

I'm actually developping a personal project with Symfony2. And i want to to do something but i don't know how to do that. I have an entity Recette and in this entity i have a property ingredients This ingredients property is a json_array type.

<?php

namespace sf2\RecetteBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Recette
 *
 * @ORM\Table()
 * @ORM\Entity(repositoryClass="sf2\RecetteBundle\Entity\RecetteRepository")
 */
class Recette
{
    // ...

    /**
     * @var array
     *
     * @ORM\Column(name="ingredients", type="json_array")
     */
    private $ingredients;

   // ...
}

?>

In this json_array i just want to save a couple of information. Ex :

["name":"potatoes","quantity":"5kg"]

Here you can find my Entity FormType :

class RecetteType extends AbstractType
{
    /**
    * @param FormBuilderInterface $builder
    * @param array $options
    */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name','text',array('label' => "test","attr"=>array('class'=>'test')))
            ->add('completionTime')
            ->add('ingredients',
                'collection',
                array(
                    'type'=>'text',
                    'prototype'=>true,
                    'allow_add'=>true,
                    'allow_delete'=>true,
                    'options'=>array(
                    )
                )
            )
            ->add('preparation')
            ->add('recetteCategories')
            ->add('Ok','submit')
        ;
    }
}

In my form i can add with jquery with any problem add an ingredient, but my problem is that i can't save the quantity information. i don't know how to display in my form two field instead one for an ingredient.

Currently when i save an ingredient i have this data in database :

["Potatoes"]

How i can display in my form two fields for an ingredient and how to save it in this format ?

["name":"potatoes","quantity":"5kg"]

Thanks.

Answer 1

Here is an example from doc How to Embed a Collection of Forms

Firstly you must create a Custom Form Field Type named IngredientType:

IngredientType

namespace Acme\RecetteBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class IngredientType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name')
            ->add('quantity')
        ;
    }

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

services.yml

# src/Acme/RecetteBundle/Resources/config/services.yml
services:
    acme_demo.form.type.ingredient:
        class: Acme\RecetteBundle\Form\Type\IngredientType
        tags:
            - { name: form.type, alias: ingredient }

And change The field type in your collection to ingredient type.

RecetteType

         ->add('ingredients',
            'collection',
            array(
                'type'=>'ingredient',
                'prototype'=>true,
                'allow_add'=>true,
                'allow_delete'=>true,
                'options'=>array(
                )
            )
        )