Laravel validate array element is required if array is present

Question

Laravel 5.7. I have a form request validation for a model Foo. The model has an optional field bar, which must be an array. If it is present, it must contain two keys, bing and bang. But if the array is absent, obviously these two keys should not be validated.

This is what I have so far:

return [
    'bar'      => 'bail|array|size:2',
    'bar.bing' => 'required|numeric',
    'bar.bang' => 'required|numeric',
];

This works when I send a request with the bar array present. But when I send a request without the bar array, I still get the validation errors

The bar.bing field is required

The bar.bang field is required

How can I make them only required when bar is present?

GluePear · Accepted Answer · 2018-09-19 13:57:13Z

8

Try with this rules

return [
    'bar'      => 'nullable|bail|array|size:2',
    'bar.bing' => 'required_with:bar|numeric',
    'bar.bang' => 'required_with:bar|numeric',
]

Docs for required_with

edited Sep 19, 2018 at 13:57

GluePear

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answered Sep 19, 2018 at 13:51

Nerea

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Comments

Sebastian Sulinski · Accepted Answer · 2018-09-19 13:48:05Z

0

Here's what I tend to do in this sort of situations

public function rules(): array
{
    $rules = [
        // ...
    ];

    if ($this->bar) {
        $rules['bar'] = 'array|size:2';
        $rules['bar.bing'] = 'required|numeric';
        $rules['bar.bang'] = 'required|numeric';
    }

    return $rules;
}

answered Sep 19, 2018 at 13:48

Sebastian Sulinski

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2 Comments

GluePear Over a year ago

Thanks for the reply. I thought about that but would love it if there was a more encapsulated way of doing it.

Sebastian Sulinski Over a year ago

You could try conditional sometimes rule, but I never tried with the array keys and haven't seen any encapsulating approach for this sort of scenario.

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