Using excludes_unless validation rule with arrays in Laravel-CodePudding

Laravel's exclude_unless,field,value rule doesn't seem to work in the instance where field is an array of values and value is contained within the field array.

Given the following:

$validator = Validator::make($request->all(), [
    'some_array' => 'array',
    'some_field' => 'exclude_unless:some_array,foo|alpha_num',
]);

Where some_array is equal to ['foo'], the validator will fail to exclude some_field. This seems to be because the comparison that lies beneath excludes_unless is in_array(['foo'], ['foo']) which returns false.

Is it possible to achieve the same logic of exclude_unless — excluding a field from validation if another field equals a certain value, but where the field being compared against is an array and we're checking that the value is in that array?

CodePudding user response：

As long as you're using Laravel 8.55 or above, you could use Rule::when():

use Illuminate\Validation\Rule;

$someArray = $request->input('some_array', []);

$validator = Validator::make($request->all(), [
    'some_array' => 'array',
    'some_field' => Rule::when(!empty(array_intersect(['foo'], $someArray)), ['exclude']),
]);

CodePudding user response：

A closure with a custom rule is what you need:

$validator = Validator::make($request->all(), [
    'some_array' => 'array',
    'some_field' => [
        function($key, $val, $fail) use (&$request) {
            if (array_search('foo', $request->some_array) === false) {
                $request->remove('some_field');
            }
        },
        'alpha_num',
    ],
]);