Final changes

app/Models/Level.php

@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
 /**
  * @property int $id
@@ -23,4 +24,9 @@ use Illuminate\Database\Eloquent\Model;
 class Level extends Model
 {
     protected $fillable = ['name', 'slug'];
+
+    public function entries(): HasMany
+    {
+        return $this->hasMany(Entry::class);
+    }
 }