add custom salted model

src/Eloquent/HashableId.php

@@ -78,7 +78,7 @@ public static function hashToId(string $hash): ?int
     }
 
     /**
-     * Get Hash Key/.
+     * Get Hash Key.
      *
      * @return string
      */
@@ -146,13 +146,21 @@ public static function bootHashableId()
      * Get HashId Repository.
      *
      * @return \Veelasky\LaravelHashId\Repository
+     *
+     * @throws \Illuminate\Contracts\Container\BindingResolutionException
      */
     protected function getHashIdRepository(): Repository
     {
         if ($this->getKeyType() !== 'int') {
             throw new LogicException('Invalid implementation of HashId, only works with `int` value of `keyType`');
         }
 
+        // get custom salt for the model (if exists)
+        if (method_exists($this, 'getHashIdSalt')) {
+            // force the repository to make a new instance of hashid.
+            app('app.hashid')->make($this->getHashKey(), $this->getHashIdSalt());
+        }
+
         return app('app.hashid');
     }
 }

tests/Models/CustomSaltModel.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Tests\Models;
+
+class CustomSaltModel extends HashModel
+{
+    public function getHashIdSalt(): string
+    {
+        return 'custom-salt';
+    }
+}

tests/Unit/HashableIdModelTest.php

@@ -6,6 +6,7 @@
 use Illuminate\Support\Str;
 use Tests\Models\HashModel;
 use Tests\Models\CustomKeyModel;
+use Tests\Models\CustomSaltModel;
 use Tests\Models\PersistingModel;
 use Tests\Models\IllegalHashModel;
 use Veelasky\LaravelHashId\Repository;
@@ -167,6 +168,12 @@ public function test_custom_key_model()
         $this->assertEquals(CustomKeyModel::idToHash($m->getKey()), $m->hash);
     }
 
+    public function test_custom_salt_model()
+    {
+        $this->getRepository()->make('custom', (new CustomSaltModel())->getHashIdSalt());
+        $this->assertEquals(CustomSaltModel::idToHash(1), $this->getRepository()->idToHash(1, 'custom'));
+    }
+
     protected function getRepository(): Repository
     {
         return app('app.hashid');