calculated : Date From To in blade

@automica i have already updated my question

i get this error in blade

          Call to a member function addDays() on string

@emfinanga then

$model->created_at->addWeek();

@emfinanga in you model cast the field to date

 protected $casts = [
        'created_at'=> 'date',
    ];

this is my controller

        public function print_sales_bill($bill_number){
        // $billsale=Sales::find($bill_number);

            $billsale=DB::table('sales')

                   ->join('customers','customers.id','=','sales.client_id')
                   ->join('users','users.id','=','sales.tag_id')
                   ->join('customer__orders','customer__orders.id','=','sales.TruckNo_id')
                   ->join('issue_to_sales','issue_to_sales.id','=','sales.unit_issue_id')
                   ->join('locations','locations.id','=','customer__orders.border_id')
                   ->join('devices','devices.id','=','issue_to_sales.unit_id')
                   ->Join("devices as devices2",\DB::raw("FIND_IN_SET(devices2.id,issue_to_sales.unit_tag_id)"),">",\DB::raw("'0'"))

                   ->where('bill_number',$bill_number)
                   ->first(['customers.*','users.*','customer__orders.*','issue_to_sales.*','locations.*','sales.*','devices2.*','devices.*',\DB::raw("group_concat(devices2.Devicenumber SEPARATOR ', ') as slavename"),'sales.created_at as created_at_sale']);


                return view('sales.printreceipt',compact('billsale'));

                   // return response()->json($billsale);
        }

as you can see created_at_sale

in blade

             <P>The Rental of This Device(s) is Valid in 7 days: <b>From {{$billsale->created_at_sale}} TO {{ $billsale->created_at_sale->addWeek() }}</b></P>

So you don't work with models, you need to parse it to carbon instance

{{ \Carbon\Carbon::parse($billsale->created_at_sale)->addWeek() }}

@michaloravec I prefer

{{ Carbon::parse($sale->created_at_sale)->addMinutes(10080) }}

@michaloravec

can you assist me on this ?

https://laracasts.com/discuss/channels/laravel/get-data-based-on-select-dropdown-list