add developper binding to platform

backend/app/Model/User.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Model;
 
+use Hyperf\Database\Model\Relations\HasMany;
 use Hyperf\DbConnection\Model\Model;
 use Qbhy\HyperfAuth\Authenticatable;
 
@@ -91,6 +92,20 @@ class User extends Model implements Authenticatable
         return password_verify($password, $this->password);
     }
 
+    public function developedPlatforms(): HasMany
+    {
+        return $this->hasMany(Platform::class, 'developer_id');
+    }
+
+    protected static function boot(): void
+    {
+        parent::boot();
+
+        static::deleting(function (User $user) {
+            $user->developedPlatforms()->update(['developer_id' => 1]);
+        });
+    }
+
     /**
      * Check if refresh token is valid.
      */