Laravel get array of values imploded from Form Request

I have the following rules in my From Request:

return [
    'brand_id' => 'required|numeric',
    'name' => 'required|string',
    'wage_type_id' => 'required|numeric',
    'work_days' => 'required|array',
    'weekly_min' => 'required|numeric',
    'weekly_max' => 'required|numeric',
    'weekly_utmost' => 'required|numeric',
    'daily_std' => 'required|numeric',
    'daily_min' => 'required|numeric',
    'daily_max' => 'required|numeric',
];

One of them, work_days is supposed to be sent as an array.

I could create the work type from validated form request like

WorkType::create($request->all());

BUT I cannot store an array in database for sure.

Is there a way to get work_days imploded so that I can use the one line above to create my record from the request directly?

Note: I want the array imploded, not json encoded, because I'm going to insert into a field type of SET.

You can actually modify the request params before creating the model in your controller.

$request->merge([
    "work_days" => implode(", ", $request->work_days)
]);

WorkType::create($request->all());

If you want it to be in the FormRequest, override the passedValidation() method

class SampleFormRequest extends FormRequest
{

    public function passedValidation()
    {
        $this->request->add([
            "work_days" => implode(", ", $this->request->get("work_days"))
        ]);
    }
}

But for me, I prefer writing all properties separately and not using the $request->all()