Symfony 4 user search by email issues - php

Question

I am trying to implement a search for user by email function into page admin's dashboard. Currently, I have hardcoded a value into $email variable just to test whether the search works. It does find the right user, but does not display anything in the twig.
Executing {{ dump() }} outputs: array:2 [▼ 0 => User {#4745 ▼ -id: 5 -
username: "test_user" -plainPassword: null -password:
"$2y$13$rGYteIrzifg9Dty.O5knOOCHQnzOtF.nZux8h1jc4sNbap5V7Xn0." -email:
"tester#test.com" } "app" => AppVariable {#2617 ▶} ]
the function I use in AdminController.php:
/**
* #Route("/admin/result", name="user_search")
* Method({"POST"})
*/
public function user_search(Request $request)
{
$email = 'tester#test.com';
$result = $this->getDoctrine()
->getRepository(User::class)
->findOneBy(['email' => $email]);
if ($result) {
return $this->render('admin/result.html.twig', $result);
}else{
return $this->render('admin/result.html.twig', [
'error' => 'No user found with this email '.$email]);
}}
result.html.twig:
{% extends 'base.html.twig' %}
{% block body %}
{% if error %}
<span class="error">{{ error }}</span>
{% endif %}
{% if result %}
<table>
<tr>
<th>Username</th><th>Email</th>
</tr>
{% for item in result %}
<tr>
<td>{{ item.getUsername }}</td><td>{{ item.getEmail }}
</td>
</tr>
{% endfor %}
</table>
{% endif %}
{{ dump() }}
{% endblock %}

Answer 1

In twig you assume that the result is an array. For this, uses findBy instead of findOneBy. findBy returns an array of objects with the desired search. The findOneBy return only an object with the desired search or null if results are not found.
Example:
// look for a single User by email
$result = $this->getDoctrine()
->getRepository(User::class)
->findOneBy(['email' => $email]);
// look for multiple User objects matching the email
$result = $this->getDoctrine()
->getRepository(User::class)
->findBy(['email' => $email]);

Answer 2

This was finally solved by these steps:
There was a typo in the hardcoded $email variable.
Changed return $this->render('admin/result.html.twig', 'result'->$result); instead of return $this->render('admin/result.html.twig', $result);
Changed <td>{{ item.username }}</td><td>{{ item.email }}</td> instead of <td>{{ result.getUsername }}</td><td>{{ result.getEmail }}</td>

Answer 3

Check $user with instance
if ($result instanceof User)
.......................................................................
I suggest you use defined in twig
{% if result is defined %}
{% extends 'base.html.twig' %}
{% block body %}
{% if error is defined %}
<span class="error">{{ error }}</span>
{% else %}
<table>
<tr>
<th>Username</th><th>Email</th>
</tr>
{% for item in result %}
<tr>
<td>{{ result.getUsername }}</td><td>{{ result.getEmail }}</td>
</tr>
{% endfor %}
</table>
{% endif %}
{% endblock %}