Conference URLs now use slugs instead of integer id

src/Entity/Conference.php

@@ -6,8 +6,11 @@ use App\Repository\ConferenceRepository;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
+use Doctrine\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\String\Slugger\SluggerInterface;
 
 #[ORM\Entity(repositoryClass: ConferenceRepository::class)]
+#[UniqueEntity('slug')]
 class Conference
 {
     #[ORM\Id]
@@ -30,6 +33,9 @@ class Conference
     #[ORM\OneToMany(targetEntity: Comment::class, mappedBy: 'conference', orphanRemoval: true)]
     private Collection $comments;
 
+    #[ORM\Column(length: 255, unique: true)]
+    private ?string $slug = null;
+
     public function __construct()
     {
         $this->comments = new ArrayCollection();
@@ -44,6 +50,13 @@ class Conference
         return $this->id;
     }
 
+    public function computeSlug(SluggerInterface $slugger)
+    {
+        if(!$this->slug || '-' === $this->slug) {
+            $this->slug = (string)$slugger->slug((string)$this)->lower();
+        }
+    }
+
     public function getCity(): ?string
     {
         return $this->city;
@@ -109,4 +122,16 @@ class Conference
 
         return $this;
     }
+
+    public function getSlug(): ?string
+    {
+        return $this->slug;
+    }
+
+    public function setSlug(string $slug): static
+    {
+        $this->slug = $slug;
+
+        return $this;
+    }
 }