Concataine 2 doctrine repository in a single variable - php

Question

Being a beginner with Symfony and Doctrine I have some difficulties to achieve what I would like.
Indeed I have 2 tables in my database : 'Prints' and 'Files'. I have 2 entities and 2 repositories.
These two tables are similar, we find almost the same variables in the entities.
I made the following code. Of course it works but I don't find it very "professional":
//we are in a new controller
/**
* #Route("/Admin/", name="Admin")
*/
public function AdminAction(){
$doctrine=$this->getDoctrine();
$repositoryPrints =$doctrine->getRepository('AppBundle:Prints');
$repositoryFiles =$doctrine->getRepository('AppBundle:Files');
$repositoryUser =$doctrine->getRepository('AppBundle:User');
$showPrints = $repositoryPrints->findAll();
$showFiles = $repositoryFiles->findAll();
$owners = $repositoryUser->findAll();
return $this->render('#App/Admin.html.twig', [
'showPrints'=> $showPrints,
'showFiles'=> $showFiles,
'owners'=> $owners
]);
}
This code makes me do a lot of repetitive code like this in my html/twig files :
//The Admin.html.twig file
{% extends 'base.html.twig' %}
{% block body %}
<table class="tableClass">
<thead>
<tr>
<th class="head">Tilte</th>
<th class="head">Owner</th>
<th class="head">Size</th>
<th class="head">Printing Duration</th>
<th class="head">Due Date</th>
<th class="headStatus">Status</th>
{% set break = false %}
{% for element in showPrints %}
{% if element.done == 1 and break == false %}
<th class="head">
Date of print
</th>
{% set break = true %}
{% endif %}
{% endfor %}
{% for element in showFiles %}
{% if element.done == 1 and break == false %}
<th class="head">
Date of print
</th>
{% set break = true %}
{% endif %}
{% endfor %}
</tr>
</thead>
A quick and easy solution would be to do this:
$showAll = $repositoryPrints->findAll() + $repositoryFiles->findAll();
instead of this :
$showPrints = $repositoryPrints->findAll();
$showFiles = $repositoryFiles->findAll();
In my controller.
Does anyone have any idea how to do this so easily?
Thank you for your attention and your potential answers.

Answer 1

findAll() function will return array. I think you can merge it using array_merge function.
$prints = $repositoryPrints->findAll();
$files = $repositoryFiles->findAll();
$showAll = array_merge($prints, $files);