Merge pull request #21 from kotchuprik/issue-12

Better handling disabled pagination, fix issue #12

Author: chuprik

grid/Column.php

@@ -27,7 +27,12 @@ public function init()
 
     protected function renderDataCellContent($model, $key, $index)
     {
-        $offset = $this->grid->dataProvider->pagination->pageSize * $this->grid->dataProvider->pagination->page;
+        $offset = 0;
+
+        if ($this->grid->dataProvider->pagination) {
+            $offset = $this->grid->dataProvider->pagination->pageSize * $this->grid->dataProvider->pagination->page;
+        }
+        
         return Html::tag('div', '☰', [
             'class' => 'sortable-widget-handler',
             'data-id' => $model->getPrimaryKey(),