在Laravel中的FormRequest中使用复杂的条件验证规则

Question

我正在使用Laravel开发Web应用程序。我现在正在做的是为验证创建一个FirmRequest。

这是我的FormRequest。

use Illuminate\Foundation\Http\FormRequest;

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

    public function rules()
    {
        return [
            'title' => 'required',
            'type' => 'required',
            'complex_field' => ...need complex conditional validation based on the type field
        ];
    }
}

如果不使用FormRequest，则可以在控制器中创建验证器，并设置复杂的条件验证规则，如下所示。

$v = Validator::make($data, [
    //fields and rules
]);

$v->sometimes('reason', 'required|max:500', function ($input) {
    return $input->games >= 100;
});

但是问题是我没有在控制器中创建验证器。但是我正在使用FormRequest。如何在FormRequest中实现同一目的？

Answer 1

You can manually adjust the rules depending on the input data:

class StoreVacancy extends FormRequest
{
    public function rules()
    {
        $reason = $this->request->get('reason'); // Get the input value
        $rules = [
            'title' => 'required',
            'type'  => 'required',
        ];

        // Check condition to apply proper rules
        if ($reason >= 100) {
            $rules['complex_field'] = 'required|max:500';
        }

        return $rules;
    }
}

Its not the same as sometimes, but it does the same job.