如何在第一个参数的数组文件数组字段上使用required_if？

Question

I have an with an array of image_file (image_file[1], image_file[2]). They are input of type file. This images are required only if another array of fields (proposition_type) is defined on 2.

For example :

• if proposition_type[1] == 2, image_file[1] has to be filled ;
• if proposition_type[2] == 1, image_file[2] has not to be filled.

I have tried to use the following rules :

$rules = [
    (...)
    'image_file.*' => 'required_if:proposition_type.*,2|image',
];

But any error on image_file fields is raised.

Moreover, I have used the required validator on my image_file.* and, here again, no error is raised.

Maybe someone has a solution for this ? Or maybe am I doing something wrong ? :)

Thanks !

Answer 1

If you would like to construct a more complex condition for the required_if rule, you may use the Rule::requiredIf method. This methods accepts a boolean or a Closure. When passed a Closure, the Closure should return true or false to indicate if the field under validation is required. Something like this may work for you:

 Validator::make($request->all(), [
 'image_file[1]' => Rule::requiredIf(function () use ($request) {
     if($request->proposition_type[1] == 2)
        return true;
     else
        return false;
 }),
 'image_file[2]' => Rule::requiredIf(function () use ($request) {
     if($request->proposition_type[2] == 1)
        return false;
     else
        return true;
 }),
]);