基于Laravel中的另一个字段设置字段的最小值

php artisan make:request SetAdditionalAmountRequest

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class SetAdditionalAmountRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [
            'initial_amount' => 'required|numeric',
            'additional_amount' => [
                'required',
                'numeric',
                function ($attribute, $value, $fail) {
                    if ($value < $this->input('initial_amount')) {
                        $fail('The additional amount must be at least equal to the initial amount.');
                    }
                },
            ],
        ];
    }
}

namespace App\Http\Controllers;

use App\Http\Requests\SetAdditionalAmountRequest;

class YourController extends Controller
{
    public function store(SetAdditionalAmountRequest $request)
    {
        // 如果验证通过，这里的代码将继续执行
        // 处理表单数据...
    }
}