jsValidator Laravel validating unique rule off two columns combined

I am having a table where I need to make sure that combination of two columns is unique. I am using laravel 5.4, and jsValidation.

here is how the two fields in the migration

$table->unique(['device_id','factory_id']);

and here is the rule I tried in FormRequest

'device_id' => 'unique:materials,device_id,NULL,id,factory_id,' . Input::get('factory_id')

The issue that I am having is that JsValidator is not sending all the parameters in its ajax method. So mostly I will get Input::get('factory_id') in the rule and so I can't implement the check.

How can I achieve my goal?

I have also tried to use the unique_with rule but that also fails. It produces this querry.

select count(*) as aggregate from `abc_devices` where `device_id` = x
// here x is the device_id but the query doesn't add the where clause for 
// the factory id... most probably because of the same above problem.

if I print the input by debug(Input::all()); I only see that jsValidator sends two parameters

array:2 [▼
  "device_id" => "222"
  "_jsvalidation" => "device_id"
]

via Chebli Mohamed