diff --git a/packages/Webkul/Admin/src/DataGrids/AttributeDataGrid.php b/packages/Webkul/Admin/src/DataGrids/AttributeDataGrid.php
index 382944d1c..461382ddc 100755
--- a/packages/Webkul/Admin/src/DataGrids/AttributeDataGrid.php
+++ b/packages/Webkul/Admin/src/DataGrids/AttributeDataGrid.php
@@ -28,6 +28,8 @@ class AttributeDataGrid extends DataGrid
 
     public function addColumns()
     {
+        $this->setInvoker($this);
+
         $this->addColumn([
             'index' => 'id',
             'label' => trans('admin::app.datagrid.id'),
@@ -64,19 +66,19 @@ class AttributeDataGrid extends DataGrid
             'filterable' => true
         ]);
 
-        $this->addColumn([
-            'index' => 'is_required',
-            'label' => trans('admin::app.datagrid.required'),
-            'type' => 'boolean',
-            'sortable' => true,
-            'searchable' => false,
-            'wrapper' => function($value) {
-                if ($value->is_required == 1)
-                    return 'True';
-                else
-                    return 'False';
-            }
-        ]);
+        // $this->addColumn([
+        //     'index' => 'is_required',
+        //     'label' => trans('admin::app.datagrid.required'),
+        //     'type' => 'boolean',
+        //     'sortable' => true,
+        //     'searchable' => false,
+        //     'wrapper' => function($value) {
+        //         if ($value->is_required == 1)
+        //             return 'True';
+        //         else
+        //             return 'False';
+        //     }
+        // ]);
 
         $this->addColumn([
             'index' => 'is_unique',
diff --git a/packages/Webkul/Product/src/Commands/DemoProducts.php b/packages/Webkul/Product/src/Commands/DemoProducts.php
new file mode 100644
index 000000000..b2087a6bf
--- /dev/null
+++ b/packages/Webkul/Product/src/Commands/DemoProducts.php
@@ -0,0 +1,28 @@
+<?php
+
+
+namespace Webkul\Product\Commands;
+
+use Webkul\Product\Repositories\ProductRepository as Product;
+
+class DemoProducts
+{
+    /**
+     * Holds ProductRepository instance
+     */
+    protected $product;
+
+    public function __construct(Product $product)
+    {
+        $this->product = $product;
+    }
+
+    /**
+     * To call the seeder and provide the demo data generators parameters
+     */
+    public function callGenerator()
+    {
+
+        $result = $this->productSeeder();
+    }
+}
\ No newline at end of file
diff --git a/packages/Webkul/Ui/src/DataGrid/DataGrid.php b/packages/Webkul/Ui/src/DataGrid/DataGrid.php
index d1ed77667..63671aa15 100644
--- a/packages/Webkul/Ui/src/DataGrid/DataGrid.php
+++ b/packages/Webkul/Ui/src/DataGrid/DataGrid.php
@@ -2,7 +2,7 @@
 
 namespace Webkul\Ui\DataGrid;
 
-use Illuminate\Http\Request;
+use Event;
 
 /**
  * DataGrid class
@@ -12,22 +12,87 @@ use Illuminate\Http\Request;
  */
 abstract class DataGrid
 {
+    /**
+     * set index columns, ex: id.
+     */
     protected $index = null;
+
+    /**
+     * To know the class of datagrid calling parent methods, to be set by the extending class.
+     */
+    protected $invoker = null;
+
+    /**
+     * Default sort order of datagrid
+     */
     protected $sortOrder = 'asc';
+
+    /**
+     * Situation handling property when working with custom columns in datagrid, helps abstaining
+     * aliases on custom column.
+     */
     protected $enableFilterMap = false;
+
+    /**
+     * This is array where aliases and custom column's name are passed
+     */
     protected $filterMap = [];
+
+    /**
+     * array to hold all the columns which will be displayed on frontend.
+     */
     protected $columns = [];
+
     protected $completeColumnDetails = [];
+
+    /**
+     * Hold query builder instance of the query prepared by executing datagrid
+     * class method setQueryBuilder
+     */
     protected $queryBuilder = [];
+
+    /**
+     * Final result of the datagrid program that is collection object.
+     */
     protected $collection = [];
+
+    /**
+     * Set of handly click tools which you could be using for various operations.
+     * ex: dyanmic and static redirects, deleting, etc.
+     */
     protected $actions = [];
+
+    /**
+     * Works on selection of values index column as comma separated list as response
+     * to your endpoint set as route.
+     */
     protected $massActions = [];
-    protected $request;
+
+    /**
+     * Parsed value of the url parameters
+     */
     protected $parse;
+
+    /**
+     * To show mass action or not.
+     */
     protected $enableMassAction = false;
+
+    /**
+     * To enable actions or not.
+     */
     protected $enableAction = false;
+
+    /**
+     * paginate the collection or not
+     */
     protected $paginate = true;
+
+    /**
+     * If paginated then value of pagination.
+     */
     protected $itemsPerPage = 15;
+
     protected $operators = [
         'eq' => "=",
         'lt' => "<",
@@ -105,9 +170,13 @@ abstract class DataGrid
 
     public function addColumn($column)
     {
+        $this->fireEvent('before.add.column.'.$column['index']);
+
         array_push($this->columns, $column);
 
         $this->setCompleteColumnDetails($column);
+
+        $this->fireEvent('after.add.column.'.$column['index']);
     }
 
     public function setCompleteColumnDetails($column)
@@ -306,12 +375,34 @@ abstract class DataGrid
         return $collection;
     }
 
+    protected function fireEvent($name)
+    {
+        $className = get_class($this->invoker);
+
+        $className = last(explode("\\", $className));
+
+        $className = strtolower($className);
+
+        $eventName = $className.'.'.$name;
+
+        Event::fire($eventName, $this->invoker);
+    }
+
     public function prepareMassActions() {
     }
 
     public function prepareActions() {
     }
 
+    public function setInvoker($class)
+    {
+        $this->invoker = $class;
+
+        // $this->invoker = last(explode("\\", $class));
+
+        // $this->invoker = strtolower($this->invoker);
+    }
+
     public function render()
     {
         $this->addColumns();
diff --git a/packages/Webkul/Ui/src/DataGrid/notes.md b/packages/Webkul/Ui/src/DataGrid/notes.md
new file mode 100644
index 000000000..86d7829a0
--- /dev/null
+++ b/packages/Webkul/Ui/src/DataGrid/notes.md
@@ -0,0 +1,17 @@
+Event::listen('attributedatagrid.before.add.column.id', function($dataGridInstance) {
+    $data = [
+        'index' => 'is_required',
+        'label' => 'trans',
+        'type' => 'boolean',
+        'sortable' => true,
+        'searchable' => false,
+        'wrapper' => function ($value) {
+            if ($value->is_required == 1)
+                return 'True';
+            else
+                return 'False';
+        }
+    ];
+
+    $dataGridInstance->addColumn($data);
+});
\ No newline at end of file