How to loop an array collection to display in strings - twig

Question

I want to display in Twig a string list of "strenghts" for a "strategy" that I get in the controller with ParamConverter (there is a one to many relation, and "strenghts" is an attribute in strategy as an array collection).
I could make it work in the controller to get the right data in my twig file (verified with a dump), but nothing is displayed in Twig (and yes data is written in database, and I checked it's not a front problem).
So I have read many topics about the same problem, and a lot of them say that I have to loop on the array collection to be able to display it in strings, which I tried but couldn't make it work.
Controller file :
/**
* #Route("fr/strategy/content/{title}", name="frContentStrategy")
*/
public function displayStrategy(Strategy $strategy): Response
{
$paramStrategy = $this->getDoctrine()->getRepository(Strategy::class)->find($strategy);
return $this->render('content_strategy/contentStrategy.html.twig', [
"strategy" => $strategy,
"paramStrategy" => $paramStrategy
]);
}
Twig file :
{% for paramStrategy in paramStrategy %}
{{ paramStrategy.strenghts }}
{% endfor %}
{{ dump(paramStrategy.strenghts)}}
What my dump displays :
I also tried a loop inside a loop like this but I get the same result with nothing displayed, and the same data with my dump :
{% for paramStrategy in paramStrategy %}
{{ paramStrategy.strenghts }}
{% for strategy in paramStrategy.strenghts %}
{{ strategy.strenghts }}
{% endfor %}
{% endfor %}
{{ dump(strategy.strenghts)}}
Edit, here are my two entities:
Strategy :
class Strategy
{
private $id;
/**
* #ORM\Column(type="string", length=255)
*/
private $title;
/**
* #ORM\ManyToOne(targetEntity=User::class, inversedBy="strategies")
*/
private $user;
/**
* #ORM\OneToMany(targetEntity=DiagnosticForce::class, mappedBy="strategy")
*/
private $strenghts;
public function __construct()
{
$this->strenghts = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
public function getTitle(): ?string
{
return $this->title;
}
public function setTitle(string $title): self
{
$this->title = $title;
return $this;
}
public function getUser(): ?User
{
return $this->user;
}
public function setUser(?User $user): self
{
$this->user = $user;
return $this;
}
/**
* #return Collection|DiagnosticForce[]
*/
public function getStrenghts(): Collection
{
return $this->strenghts;
}
public function addStrenght(DiagnosticForce $strenght): self
{
if (!$this->strenghts->contains($strenght)) {
$this->strenghts[] = $strenght;
$strenght->setStrategy($this);
}
return $this;
}
public function removeStrenght(DiagnosticForce $strenght): self
{
if ($this->strenghts->removeElement($strenght)) {
// set the owning side to null (unless already changed)
if ($strenght->getStrategy() === $this) {
$strenght->setStrategy(null);
}
}
return $this;
}
public function __toString()
{
return $this->title;
}
}
DiagnosticForce :
class DiagnosticForce
{
private $id;
/**
* #ORM\Column(type="string", length=255, nullable=true)
*/
private $strenght;
/**
* #ORM\ManyToOne(targetEntity=Strategy::class, inversedBy="strenghts")
*/
private $strategy;
public function getId(): ?int
{
return $this->id;
}
public function getStrenght(): ?string
{
return $this->strenght;
}
public function setStrenght(?string $strenght): self
{
$this->strenght = $strenght;
return $this;
}
public function getStrategy(): ?Strategy
{
return $this->strategy;
}
public function setStrategy(?Strategy $strategy): self
{
$this->strategy = $strategy;
return $this;
}
}

Answer 1

With autowiring your $strategy parameter should already be the same entity as $paramStrategy, no need to use the repository.
So, in twig you should just need the following:
{% for strenght in strategy.strenghts %}
{{ strenght }}
{% endfor %}
This should have the same result as the following in php:
foreach ($strategy->getStrenghts() as $strenght){
echo "\n$strenght\n";
}