how to iterate over symfony 3 doctrine findby() result set - php

Question

I am new to symfony/doctrine and when setting up my first table and query I am struggling with the best way to output results in Twig.
So, I have this method on \AppBundle\Controller\BrandsController
public function showAction($brand)
{
$product = $this->getDoctrine()
->getRepository('AppBundle:Brands')
->findOneByBrand($brand);
if (!$product) {
throw $this->createNotFoundException(
'No product found for id '.$brand
);
}
return $this->render('brands/brands.html.twig', [
'product' => $product
]);
}
This produces an object like below, which I cannot iterate over.
Brands {#459 ▼
-brand_id: 24
-brand: "Ford"
-active: "Y"
-img_logo: "/img/brand/ford.png"
-img_logo_small: "/img/brand/ford_20.png"
-img_logo_big: "/img/brand/ford-big.png"
}
Of course I can create a query like below, but that negates the benefit of the findBy() method:
$repository = $this->getDoctrine()
->getRepository('AppBundle:Brands');
$query = $repository->createQueryBuilder('p')
->where('p.brand = :brand')
->setParameter('brand', $brand)
->getQuery();
$product = $query->getSingleResult(\Doctrine\ORM\AbstractQuery::HYDRATE_ARRAY);
I found similar questions, like this one, but they mess up with the array keys by giving a array that looks like:
array:6 [▼
"\x00AppBundle\Entity\Brands\x00brand_id" => 24
"\x00AppBundle\Entity\Brands\x00brand" => "Ford"
"\x00AppBundle\Entity\Brands\x00active" => "Y"
"\x00AppBundle\Entity\Brands\x00img_logo" => "/img/brand/ford.png"
"\x00AppBundle\Entity\Brands\x00img_logo_small" => "/img/brand/ford_20.png"
"\x00AppBundle\Entity\Brands\x00img_logo_big" => "/img/brand/ford-big.png"
]
By the way, that's the simple version of the code on brands/brands.html.twig:
{% for item in product %}
<p> This is my {{ item }}</p>
{% endfor %}
Is there a clean way to do it?
Thanks

Answer 1

The idea is to use Entity Serializer Doctrine Script , look to the link below :
https://github.com/borisguery/bgylibrary/blob/master/library/Bgy/Doctrine/EntitySerializer.php
Just copy the script into a new class : EntitySerializer.php , under AppBundle\Controller , then in your BrandsController class:
$em = $this->getDoctrine()->getManager();
$product = $em->getRepository('AppBundle:Brands') ->findOneByBrand($brand);
$serializer = new EntitySerializer($em);
$product = $serializer->toArray($product);
and finnally you can easily iterate the array :
foreach ($array as $key => $value) {
echo 'the key is '.$key.'<br>';
echo 'the value is '.$value;
}

Answer 2

General...
It's kinda bad idea to iterate through your product in twig like an array. Just because it's matter of time till you'll need more controll like show/do this if product is active or not... and so on. So pretty soon you'll have to do somthing like this (just an wild example of possible usecase...)
{% if product|default %}
{# if logo isn't there or empty or similar use path to no-logo.png as fallback #}
{% set _product_logo_path = product.img_logo|default('/assets/images/no-logo.png') %}
{{ product.brand }} <img src="{{- _product_logo_path -}}" title="blah blah" />
{% if not product.isActive|default %}
<span>currently unavailable</span>
{% endif %}
{% endfi %}
Architectual...
You can use your repository for that kind of "manipulation"
something like :
in your controller:
$product = $this->getDoctrine()
->getRepository('AppBundle:Brands')
->findOneForViewByBrand($brand);
// concider to use instanceof since you expecting Brands object
// if not stay with !$product
if( false === $product instanceof Brands )
{
// not found exception..
}
in your Repo-Class
public function findOneForViewByBrand( $brand )
{
// you ca make use of PARTIAL SELECTS
// NOTE: if you use PARTIAL selects you have to select at least id, like PARTIAL p.{brand_id}
$query = $this->createQueryBuilder('p')
->select('PARTIAL p.{brand_id, brand, active, img_logo, img_logo_small, img_logo_big}')
->where('p.brand = :brand')
->setParameter('brand', $brand)
->getQuery();
// If found you'll get a Brand BUT ONLY field in curly brackets will be populated with data, others will be just NULL
return $query->getOneOrNullResult(\Doctrine\ORM\AbstractQuery::HYDRATE_ARRAY);
}
and then in your twig
{% for fieldName, fieldValue in product %}
{# should skip null values #}
{% if fieldValue is defined and fieldValue is not empty % }
<p> This is my {{ fieldValue }}</p>
{% endif %}
{% endfor %}
About Partial Selects
P.S. code is untested and it's here so you can get an idea ;) I don't know what version of symfony you use and what version of doctrine is installed, so if one of mentioned methods doesn't exists - please don't be angry :)