<?php 
 
Validator:: make ( $rows -> toArray ( ) ,  [ 
    '*.device_id'  =>  [ 'required' ,  'integer' ,  'exists:App\Device,id' ,  Rule:: unique ( 'prices' ) 
        -> where ( 'device_id' ,  $rows [ 'device_id' ] ) 
    ] , 
    '*.price'  =>  [ 'required' ,  'numeric' ,  'min:0' ,  'max:16777215' ] , 
] ) 
-> validate ( ) ; 
 
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