Merge pull request #8 from mrl22/main

Author: bensherred

src/Concerns/HasSqids.php

@@ -18,7 +18,7 @@ protected function initializeHasSqids(): void
         $this->append(['sqid']);
     }
 
-    public function getSqidAttribute(): string
+    public function getSqidAttribute(): ?string
     {
         return Sqids::forModel(model: $this);
     }

src/Sqids.php

@@ -10,11 +10,15 @@
 
 class Sqids
 {
-    public static function forModel(Model $model): string
+    public static function forModel(Model $model): ?string
     {
-        /** @var int $id */
+        /** @var int|null $id */
         $id = $model->getKey();
 
+        if ($id === null) {
+            return null;
+        }
+
         $prefix = static::prefixForModel(model: $model::class);
         $separator = $prefix ? Config::separator() : null;
         $sqid = static::encodeId(model: $model::class, id: $id);