Update readme

Author: navneetrai

README.md

@@ -67,6 +67,28 @@ You can also update, re-arrange (for one-to-many relationships), and delete rela
 
 ![Rearrange Models](https://raw.githubusercontent.com/kirschbaum-development/nova-inline-relationship/master/screenshots/UpdateView.png "Rearrange Models")
 
+ To rearrange a model you should specify an `integer` field which will be used to sort models. For example, in the following code we will use a field named `weight` to store the sorting order for `Images`.
+ 
+ ```php
+ namespace App\Nova;
+ 
+ use Laravel\Nova\Fields\Image;
+ 
+ class BlogPost extends Resource
+ {
+     //...
+     public function fields(Request $request)
+     {
+         return [
+             //...
+ 
+             HasMany::make('Images', 'images', Image::class)->inline()->sortUsing('weight'),
+         ];
+     }
+ }
+ ```
+
+
 ## Required Relationships
 
 Occasionally you may want to require a child relationship during the creation of a model. To do this, just use the `requireChild()` method. As an example, you may want to create a new user and enforce that a new profile for the user is also created.