Added pagination

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "kalnoy/nestedset",
+    "name": "sozidatel79/nestedset",
     "description": "Nested Set Model for Laravel 4-5",
     "keywords": ["laravel", "nested sets", "nsm", "database", "hierarchy"],
     "license": "MIT",

src/QueryBuilder.php

@@ -11,6 +11,7 @@
 use Illuminate\Support\Arr;
 use LogicException;
 use Illuminate\Database\Query\Expression;
+use Illuminate\Pagination\Paginator;
 
 class QueryBuilder extends Builder
 {
@@ -1085,4 +1086,27 @@ public function root(array $columns = ['*'])
     {
         return $this->whereIsRoot()->first($columns);
     }
+
+    /**
+     * @param null $perPage
+     * @param array $columns
+     * @param string $pageName
+     * @param null $page
+     * @return \Illuminate\Contracts\Pagination\LengthAwarePaginator|\Illuminate\Pagination\LengthAwarePaginator
+     */
+    public function paginate($perPage = null, $columns = ['*'], $pageName = 'page', $page = null)
+    {
+        $page = $page ?: Paginator::resolveCurrentPage($pageName);
+
+        $perPage = $perPage ?: $this->model->getPerPage();
+
+        $results = ($total = $this->toBase()->getCountForPagination())
+            ? $this->forPage($page, $perPage)->get($columns)
+            : $this->model->newCollection();
+
+        return $this->paginator($results, $total, $perPage, $page, [
+            'path' => Paginator::resolveCurrentPath(),
+            'pageName' => $pageName,
+        ]);
+    }
 }