使用laravel bag验证表单

Question

我在一个页面上有多个带有验证的表单，所以一旦提交了其中一个表单，它就会在每个表单上显示验证错误。我希望防止这种情况发生，因此如果提交了表单1，我希望只显示表单1的验证消息，而不显示表单2。

这就是我目前的想法：

控制器

    public function composeMail(Request $request)
    {

        $validator = Validator::make($request->all(),
            [
                'subject' => 'max:40|regex:/^[A-Za-z]+$/u',
                'body' => 'required|min:1|max:1000|regex:/^[A-Za-z0-9]+$/u'
            ],
            [
                'subject.max' => 'Subject can be maximum 40 symbols length.',
                'subject.regex' => 'In subject Only numbers and latin letters is allowed.',
                'body.required' => 'Message cannot be empty.',
                'body.min' => 'Message shall contain at least one character.',
                'body.max' => 'Message can be only 10000 symbols length.',
                'body.regex' => 'In message only numbers and latin letters is allowed.',
        ])->validateWithBag('email');

        return redirect()->back()->withErrors($validator);

视图

                @if ($errors->any())
                    <div class="alert">
                        <ul>
                            @foreach ($validator->email as $error)
                                <li>{{ $error }}</li>
                            @endforeach
                        </ul>
                    </div>
                @endif

目前它只是返回到页面，没有任何反应，验证不起作用，也不会打印出任何东西……你能告诉我它出了什么问题吗？

Answer 1

我想你也需要发送错误包的名字

public function composeMail(Request $request)
    {

        $validator = Validator::make($request->all(),
            [
                'subject' => 'max:40|regex:/^[A-Za-z]+$/u',
                'body' => 'required|min:1|max:1000|regex:/^[A-Za-z0-9]+$/u'
            ],
            [
                'subject.max' => 'Subject can be maximum 40 symbols length.',
                'subject.regex' => 'In subject Only numbers and latin letters is allowed.',
                'body.required' => 'Message cannot be empty.',
                'body.min' => 'Message shall contain at least one character.',
                'body.max' => 'Message can be only 10000 symbols length.',
                'body.regex' => 'In message only numbers and latin letters is allowed.',
        ])->validateWithBag('email');

        return redirect()->back()->withErrors($validator, 'email');
}

在刀片视图中，来自命名包的错误需要访问为

@if ($errors->any())
    <div class="alert">
         <ul>
             @foreach ($errors->email as $error)
                 <li>{{ $error }}</li>
             @endforeach
         </ul>
    </div>
@endif

Answer 2

您正在使用->validateWithBag('email');获得自动重定向请参阅Automatic redirection，

但您仍然要通过return redirect()->back()->withErrors($validator, 'email');。

当它失败时，你也应该重定向，

if ($validator->fails()) {
            return redirect()
                        ->back()
                        ->withErrors($validator, 'email');
                        
        }

另外，如果你想要自动重定向，你可以直接使用

$validatedData = $request->validateWithBag('email', [
                'subject' => 'max:40|regex:/^[A-Za-z]+$/u',
                'body' => 'required|min:1|max:1000|regex:/^[A-Za-z0-9]+$/u'
            ],
            [
                'subject.max' => 'Subject can be maximum 40 symbols length.',
                'subject.regex' => 'In subject Only numbers and latin letters is allowed.',
                'body.required' => 'Message cannot be empty.',
                'body.min' => 'Message shall contain at least one character.',
                'body.max' => 'Message can be only 10000 symbols length.',
                'body.regex' => 'In message only numbers and latin letters is allowed.',
        ]);

Answer 3

你所看到的行为是意料之中的。$errors->any()检查default消息包，不考虑命名错误包。

Illuminate\Support\ViewErrorBag.php

/**
 * Determine if the default message bag has any messages.
 *
 * @return bool
 */
public function any()
{
    return $this->count() > 0;
}

/**
 * Get the number of messages in the default bag.
 *
 * @return int
 */
public function count()
{
    return $this->getBag('default')->count();
}

因此，要使用命名包显示特定表单的错误，您需要按如下方式访问它们：

@if ($errors->namedBag->any())
  <ul>
  @foreach($errors->namedBag->all() as $error)
    <li>{{ $error }}</li>
  @endforeach
  </ul>
@endif

如果您不想将所有验证错误消息放在一起，但可能希望将特定于字段的错误消息放在字段下面，则可以在命名错误包上提供带有字段名称的get()方法，以仅获取所需的错误：

@if ($errors->namedBag->get('name'))
  <ul>
  @foreach($errors->namedBag->get('name') as $error)
    <li>{{ $error }}</li>
  @endforeach
  </ul>
@endif