laravel 5.4 MIME 自定义错误消息不起作用？

Dearest,

我想为上传的图像制作自定义错误消息，

这是我的控制器代码：

protected function validator($data = [], $validateContent = []){
    $messages = [
        'imgUserAvatar:mimes' => 'File Type must be in jpeg,jpg,png'
    ];

    return Validator::make($data, $validateContent, $messages);
}
$validateContent = [
            'imgUserAvatar'     => 'mimes:jpeg,jpg,png|max:2000',
            'textUserEmail'     => 'required|unique:admin_user,user_email|max:50',
            'textFirstName'     => 'required|max:50',
            'textLastName'      => 'max:50',
            'textPwd'           => 'required|min:6|regex:/^.*(?=.{3,})(?=.*[a-zA-Z])(?=.*[0-9])(?=.*[\d\X])(?=.*[!$#%]).*$/',
            'textPwdConfrim'    => 'required|same:textPwd'
        ];

        $validation = $this->validator($request->all(), $validateContent);

但这个自定义消息不想显示，默认消息显示图片链接 https://i.stack.imgur.com/QCp46.png

有什么我错误编码的吗？

你需要使用dot在字段和规则之间，所以你应该使用：

$messages = [
    'imgUserAvatar.mimes' => 'File Type must be in jpeg,jpg,png'
];

代替

$messages = [
    'imgUserAvatar:mimes' => 'File Type must be in jpeg,jpg,png'
];