How to validate array size based on a field in the request with Laravel Form Request

Question

My request looks a bit like this:

"adults": {
    "count": 2,
    "persons": {
        [
            "name": "Anne",
            "surname": "Doe",

        ],    
        [
            "name": "Anne",
            "surname": "Doe",

        ],
    }
}

How can I easily verify using a custom Request that the count field matches the size of the persons?

Here's my Rules:

class CreateFamilyRequest extends ApiRequest
{
    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'adults' => ['array'],
            'adults.number' => ['int'],
            'adults.persons.*.name' => ['string'],
            'adults.persons.*.surname' => ['string'],
        ];
    }
}

mrhn · Accepted Answer · 2020-06-11 07:55:49Z

1

You are in context of the request, so you can access it as you would in the controller, by using $this for current object context. Therefor you can just fetch out the size, assuming this is a JSON request, else change the input method.

'adults.persons' => ['array', 'size:' . $this->json('adults')['count'] ?? -1],

edited Jun 11, 2020 at 7:55

answered Jun 10, 2020 at 22:36

mrhn

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1 Comment

mrhn Over a year ago

Both the validation key and the json access was wrong updated my answer.. Still the idea remain the same

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