add feature without test

Author: kitar

src/Kitar/Dynamodb/Model/Model.php

@@ -374,7 +374,7 @@ public function __call($method, $parameters)
             return $this->$method(...$parameters);
         }
 
-        if (! in_array($method, $allowedBuilderMethods)) {
+        if (! in_array($method, $allowedBuilderMethods) && ! $this->hasNamedScope($method)) {
             static::throwBadMethodCallException($method);
         }
 

src/Kitar/Dynamodb/Query/Builder.php

@@ -472,9 +472,38 @@ public function __call($method, $parameters)
             return $this;
         }
 
+        if ($this->hasNamedScope($method)) {
+            return $this->callNamedScope($method, $parameters);
+        }
+
         throw new BadMethodCallException('Call to undefined method ' . static::class . "::{$method}()");
     }
 
+    /**
+     * Determine if the given model has a scope.
+     *
+     * @param  string  $scope
+     *
+     * @return bool
+     */
+    public function hasNamedScope(string $scope): bool
+    {
+        return $this->model_class && (new $this->model_class)->hasNamedScope($scope);
+    }
+
+    /**
+     * Apply the given named scope on the current builder instance.
+     *
+     * @param  string  $scope
+     * @param  array  $parameters
+     *
+     * @return mixed
+     */
+    protected function callNamedScope(string $scope, array $parameters = [])
+    {
+        return (new $this->model_class)->callNamedScope($scope, array_merge([$this], $parameters));
+    }
+
     /**
      * @inheritdoc
      */