Laravel: custom array validation depends on previous selected value - laravel

Question

Laravel version: 7.x
I have tested the code with hard-coded valid device_company_id (which is associated with the selected device) and it works fine.
Tables
device_companies
|- id
|- company_id
|- title
|- ...
devices
|- id
|- device_company_id
|- ...
Request data
Array
(
...
[devices] => Array
(
[0] => Array
(
[device_company_id] => 1
[device_id] => 2
[device_inventory_id] => null
[amount] =>
[refundable] =>
[description] =>
)
)
)
Rules:
...
$rules = array_merge($rules, [
'devices' => [
'required',
'array'
],
'devices.*.device_company_id' => [
'required',
'integer',
'exists:device_companies,id,company_id,' . auth()->user()->id
],
'devices.*.device_id' => [
'required',
'integer',
'exists:devices,id,device_company_id,devices.*.device_company_id'
],
]);
...
I need a custom validation rule for the exists validator to validate if device actually belongs the selected device_company or not. Because I don't want anyone opening the inspect tool, change the value and causing the application an error or anything like that.

Answer 1

Here is the link where I found the reference https://ericlbarnes.com/2015/04/04/laravel-array-validation/
My code:
...
$rules = [
...other rules
];
$newRules = [
'devices' => [
'required',
'array'
],
'devices.*.device_company_id' => [
'required',
'integer',
'exists:device_companies,id,company_id,' . auth()->user()->id
],
];
foreach($data['devices'] as $key => $array)
{
$newRules["devices.{$key}.device_id"] = [
'required',
'integer',
"exists:devices,id,device_company_id,{$array["device_company_id"]}",
];
}
$rules = array_merge($rules, $newRules);
...
Although, this code is working for me but I feel its not the proper way to do it. It feels kind of a way around instead of the proper solution. If anyone finds a better solution then please do post your answer.
Hope this can be helpful for someone. Thanks :)