/**
* Artisan Command
*/

php artisan make:request RequestName

/**
* Controller Code
*/
// inject filepath to custom request
use App\Http\Requests\RequestName;

// inject custom request as $request
// $request knows about validation and will automatically validate
public function store(RequestName $request)
    {
        Category::create([
            'name' => $request->name
        ]);

        session()->flash('success', 'Category Successfully Created');

        return redirect(route('categories.index'));
    }
    
/**
* Request File
*/
class CreateCategoryRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
    // this is where validation rules are set
        return [
            'name' => 'required|unique:categories'
        ];
    }
}