Laravel中自定义Rule::in验证规则的错误消息

use Illuminate\Validation\Rule;
use Illuminate\Support\Facades\Session;

// 假设 $agency_names 数组已经从 Session 中获取并填充
$agencies = Session::get('config.agency-names');
$agency_names = [];
for ($x = 0; $x < count($agencies['Agencies']); $x++) {
    $name = $agencies['Agencies'][$x]["AgencyName"];
    array_push($agency_names, $name);
    // 假设也允许空值，根据实际需求添加
    // array_push($agency_names, ''); 
}

$request->validate([
    'referral'    => 'required',
    'agency-name' => ['required_if:referral,no', Rule::in($agency_names)],
    'password'    => 'required|min:6|regex:/[A-Z]/|regex:/[a-z]/|regex:/[0-9]/|confirmed'
], [
    // 尝试自定义 agency-name 的 Rule::in 消息 (不正确的方法)
    // 'agency-name.Rule::in(agency_names)' => '您选择的机构名称无效，请重新选择。',

    // 其他自定义密码消息
    'password.confirmed' => '确认密码不匹配，请重试。',
    'password.regex'     => '密码不符合要求，请重试。',
    'password.min'       => '密码长度不足，请重试。',
]);

use Illuminate\Validation\Rule;
use Illuminate\Support\Facades\Session;
use Illuminate\Http\Request; // 引入 Request 类

// 假设 $agency_names 数组已经从 Session 中获取并填充
// 示例数据，实际应用中会从 Session 或数据库获取
$agenciesData = [
    'Agencies' => [
        ['AgencyName' => 'Agency A'],
        ['AgencyName' => 'Agency B'],
        ['AgencyName' => 'Agency C'],
    ]
];
Session::put('config.agency-names', $agenciesData);

$agencies = Session::get('config.agency-names');
$agency_names = [];
if (isset($agencies['Agencies'])) {
    foreach ($agencies['Agencies'] as $agency) {
        $agency_names[] = $agency["AgencyName"];
    }
}
// 根据原问题，也可能包含空字符串作为有效选项
$agency_names[] = '';

// 模拟一个请求
$request = Request::create('/test', 'POST', [
    'referral' => 'no',
    'agency-name' => 'Invalid Agency', // 故意设置一个无效值来触发错误
    'password' => 'Password123',
    'password_confirmation' => 'Password123'
]);

// 执行验证
$validator = validator($request->all(), [
    'referral'    => 'required',
    'agency-name' => ['required_if:referral,no', Rule::in($agency_names)],
    'password'    => 'required|min:6|regex:/[A-Z]/|regex:/[a-z]/|regex:/[0-9]/|confirmed'
], [
    // 正确的自定义 agency-name 的 Rule::in 消息
    'agency-name.in' => '您选择的机构名称无效，请从提供的列表中选择。',

    // 其他自定义密码消息
    'password.confirmed' => '确认密码不匹配，请重试。',
    'password.regex'     => '密码不符合要求，必须包含大小写字母和数字。',
    'password.min'       => '密码长度不足，请重试。',
]);

if ($validator->fails()) {
    foreach ($validator->errors()->all() as $message) {
        echo $message . "\n";
    }
} else {
    echo "验证成功！\n";
}