您可以在单个字符串管道中进行验证，也可以在数组中进行验证。

'video' => ['nullable', new RuleYoutube],

看看livewire validation docs。

我解决这个问题的方法是利用Livewire的validateOnly方法和一个 invokable 验证规则。

public function updated($propertyName)
{
    if($propertyName == 'enquiry.contact_email'){
        $this->validateOnly('enquiry.contact_email', [
            'enquiry.contact_email' => [new DelimitedEmail, 'required']
        ]);
    }
}

可调用规则：php artisan make:rule DelimitedEmail --invokable
编码：

class DelimitedEmail implements InvokableRule
{
    public function __invoke($attribute, $value, $fail)
    {
        $func = function(string $value): string {
            return trim($value);
        };
        if(str_contains($value, ',')) {
            $emails = array_map($func,explode(',',$value));
            foreach($emails as $email) {
                if(!filter_var($email, FILTER_VALIDATE_EMAIL)) $fail('This field has an invalid email address.');
            }
        } else {
            if(!filter_var($value, FILTER_VALIDATE_EMAIL)) $fail('That is an invalid email address.');
        }
    }
}