How do I make one of the several fields required?

Question

My Eloquent model consists of 30 fields.

Validation Rule:

1. The first field is required
2. Out of the other 29 fields, at least one field is required.

Checking the documentation of Laravel 5.5, I found required_without_all validation rule quite relatable. One way of writing the above validation rule would be to specify in each of the 29 fields required_without_all:field1,.....,field28 (i.e. the other fields excluding the first and the given field)

But, this requires writing the 28 field names in the validation rule of all the fields excluding the first one. Is there any simpler, non-redundant approach?

Answer 1

You can still use required_without_all, but to keep it maintainable, you could do something like this in related Request class:

public function rules()
{
    $rules = [
        'name' => 'required',
        'email' => 'required|email'
    ];

    $fields = collect(['field1', 'field2', ...., 'field29']);

    foreach ($fields as $field) {
        $rules[$field] = 'required_without_all:' . implode(',', $fields->whereNotIn(null, [$field])->toArray());
    }

    return $rules;
}