I have add button in each row ,but I want to check if info column data is N/A, then not shown the button, I have try to set render as below in my code ,but it's not work 

```
{
    "targets": -1,
    "data": null,
    "render": function ( data, type, row ) 
    {
        if (row.info != 'N/A') {
        return "<button href='" + row.index() + "' class='btn btn-info'>View</button>"
        } else { return "" }
     }
    }                    
}

```

Any help/advice is greatly appreciated.
Willing to post any more information if it will help.