redirect with input

Best,

I have made an form with some input.
When the validation is not ok then you can use

PHP Code:

return redirect()->back()->withInput(); 


And in the form you can use "old"as value so the input field is automatic filled with the old value.

But i use model validation how can i send the errors with the return redict withinput.

I know there is another way but that is more code, i was wondering if it is possible.

André