CodingSeo
diff --git a/‎src/Http/Controllers/EloquentController.php
Lines changed: 1 addition & 0 deletions b/‎src/Http/Controllers/EloquentController.php
Lines changed: 1 addition & 0 deletions
diff --git a/‎tests/Http/Controllers/PostsController.php
Lines changed: 42 additions & 0 deletions b/‎tests/Http/Controllers/PostsController.php
Lines changed: 42 additions & 0 deletions
diff --git a/‎tests/Integration/Eloquent/PostsTest.php
Lines changed: 48 additions & 0 deletions b/‎tests/Integration/Eloquent/PostsTest.php
Lines changed: 48 additions & 0 deletions
@@ -236,6 +236,7 @@ protected function commit(Model $model, ResourceObjectInterface $resource)
         $this->beforeCommit($model, $resource, $isUpdating);
 
         $result = $this->save($model, $resource);
+        $model->refresh();
 
         if ($result) {
             $this->afterCommit($model, $resource, $isUpdating);
 
@@ -5,10 +5,16 @@
 use CloudCreativity\LaravelJsonApi\Http\Controllers\EloquentController;
 use CloudCreativity\LaravelJsonApi\Tests\JsonApi\Posts\Hydrator;
 use CloudCreativity\LaravelJsonApi\Tests\Models\Post;
+use Illuminate\Support\Collection;
 
 class PostsController extends EloquentController
 {
 
+    /**
+     * @var Collection
+     */
+    private $invokables;
+
     /**
      * PostsController constructor.
      *
@@ -17,5 +23,41 @@ class PostsController extends EloquentController
     public function __construct(Hydrator $hydrator)
     {
         parent::__construct(new Post(), $hydrator);
+        $this->invokables = collect();
+    }
+
+    /**
+     * Set a callback for testing purposes.
+     *
+     * @param $event
+     * @param callable $fn
+     * @return $this
+     */
+    public function on($event, callable $fn)
+    {
+        $this->invokables[$event] = $fn;
+
+        return $this;
+    }
+
+    /**
+     * @param array ...$args
+     */
+    protected function saving(...$args)
+    {
+        $this->invoke('saving', $args);
+    }
+
+    /**
+     * Invoke a test callback.
+     *
+     * @param $event
+     * @param array $args
+     */
+    private function invoke($event, array $args)
+    {
+        if ($fn = $this->invokables->get($event)) {
+            call_user_func_array($fn, $args);
+        }
     }
 }
@@ -2,6 +2,7 @@
 
 namespace CloudCreativity\LaravelJsonApi\Tests\Integration\Eloquent;
 
+use CloudCreativity\LaravelJsonApi\Tests\Http\Controllers\PostsController;
 use CloudCreativity\LaravelJsonApi\Tests\Models\Post;
 use CloudCreativity\LaravelJsonApi\Tests\Models\Tag;
 
@@ -86,6 +87,10 @@ public function testCreate()
             ->assertCreateResponse($data);
 
         $this->assertModelCreated($model, $id, ['title', 'slug', 'content', 'author_id']);
+        $this->assertDatabaseHas('post_tag', [
+            'post_id' => $id,
+            'tag_id' => $tag->getKey(),
+        ]);
     }
 
     /**
@@ -119,6 +124,49 @@ public function testUpdate()
         $this->assertModelPatched($model, $data['attributes'], ['content']);
     }
 
+    /**
+     * Issue 125.
+     *
+     * If the model caches any of its relationships prior to a hydrator being invoked,
+     * any changes to that relationship will not be serialized when the schema serializes
+     * the model.
+     *
+     * @see https://github.com/cloudcreativity/laravel-json-api/issues/125
+     */
+    public function testUpdateRefreshes()
+    {
+        /** @var PostsController $controller */
+        $controller = $this->app->make(PostsController::class);
+        $this->app->instance(PostsController::class, $controller);
+
+        $controller->on('saving', function ($model) {
+            $model->tags; // causes the model to cache the tags relationship
+        });
+
+        $model = $this->createPost();
+        /** @var Tag $tag */
+        $tag = factory(Tag::class)->create();
+
+        $data = [
+            'type' => 'posts',
+            'id' => (string) $model->getKey(),
+            'relationships' => [
+                'tags' => [
+                    'data' => [
+                        ['type' => 'tags', 'id' => (string) $tag->getKey()],
+                    ],
+                ],
+            ],
+        ];
+
+        $this->doUpdate($data)->assertUpdateResponse($data);
+
+        $this->assertDatabaseHas('post_tag', [
+            'post_id' => $model->getKey(),
+            'tag_id' => $tag->getKey(),
+        ]);
+    }
+
     /**
      * Test the delete resource route.
      */