How TWIG executes if conditionals? - php

Question

I have a php snippet in Symfony2 where I say:
If the user exists -> return these data sets in an array to the template
else -> return name=> 'user not found'. Below is the only way this can work if I have in my twig only the variable 'first_name' being used.
Clear Problem Explanation:
If the user doesn't exist in the database, I cannot call user.name, user.username, user.password. Even if the if conditional isn't satisfied, twig still tries to evaluate that inside statement.
What I want to say is:
if (user) {
{{ user.name }}<br>
{{ user.username }}<br>
{{ user.password }} <br>
}
else {
User not found
}
However, if the user isn't found, it will still try and execute the DB access from the variable user ... user.name.. etc. How can I fix this?
PHP Snippet
/**
* #Route("/login/{username2}/{password2}")
* #Template()
*/
public function indexAction($username2, $password2)
{
$em = $this->getDoctrine()->getEntityManager();
$respository = $em->getRepository("SchachteUserBundle:user");
$username = $username2;
$password = $password2;
$user = $respository->findOneBy(array("username"=>$username, "password"=>$password));
if ($user) {
return array('exists'=>true, 'first_name' => $user->getName(), 'username' => $user->getUserName(), 'password'=>$user->getPassword());
}
return array('exists'=>false, 'first_name' => 'USER NOT FOUND', 'username' => 'USER NOT FOUND', 'password'=>'USER NOT FOUND');
}
}
TWIG
{% if exists == true %}
Hello {{ first_name }}!
{% else %}
Sorry, that user does not exist!
{% endif %}

Answer 1

Why not simply inject the return of your findOneBy in the template :
$user = $respository->findOneBy(array("username"=>$username, "password"=>$password));
return array('user'=>user);
Then in the template
{% if user %}
{{ user.name }}<br>
{{ user.username }}<br>
{{ user.password }}
{% else %}
User not found
{% endif %}
Moreover if you query the database with a password it means you have stored the clear password. It is very bad practice.