Laravel 5.2--如何让表单提交错误，不清空？

控制器

 public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'Subject.title'       => 'required|string',
            'Subject.subtitle'    => 'string',
            'Subject.image'       => 'required|file|image',
            'Subject.content'     => 'required|string',
            'Subject.product_ids' => 'array',
        ], [
            'title.required'   => '标题不能为空',
            'image.required'   => '图片为空或格式出错',
            'content.required' => '专题内容不能为空',
        ],[
            'Subject.title' => '标题',
            'Subject.image' => '图片',
            'Subject.content' => '专题内容'
        ]);

        if ($validator->fails()) {
            $errors = $validator->errors()->toArray();
            return redirect()->back()->withInput()->with(compact('errors'));
        }

。。。。

可以用with(compact('errors') 用了返回错误，在页面上显示，用withError()方法，试了下，没有效果的。

视图

<section>
    <div class="section-body">
        <div class="card">
            <div class="card-body">
                <div class="row">
                    @php
                    $subject_exist = isset($subject) ? true : false;
                    @endphp
                    @if($subject_exist)
                        {!! Form::open(['action' => ['Admin\SubjectController@update', $subject->id], 'class' => 'form',
                        'id' => 'subject-form', 'enctype' => 'multipart/form-data', 'method' => 'PUT']) !!}
                    @else
                        {!! Form::open(['action' => 'Admin\SubjectController@store', 'class' => 'form', 'id' =>
                        'subject-form', 'enctype' => 'multipart/form-data']) !!}
                    @endif
                    @include('admin.widget.image-upload', [
                        'colsm' => '4',
                        'collg' => '2',
                        'id'    => 'subject-image',
                        'name'  => 'image',
                    ])
                    @include('admin.widget.input', [
                        'name' => 'editIden',
                        'id'   => 'editIden',
                        'type' => 'hidden'
                    ])
                    @include('admin.widget.input', [
                        'colsm' => '12',
                        'collg' => '8',
                        'name'  => "Subject[title]",
                        'id'    => 'title',
                        'title' => '标题',
                        'type'  => 'text',
                        'value' => old('Subject')['title'] ? old('Subject')['title'] : ( isset($subject) && $subject->content  ? $subject->title : '' ) //两个三元运算符的一起写的，切记加括号（）
                    ])
                    @include('admin.widget.input', [
                        'colsm' => '12',
                        'collg' => '8',
                        'name'  => "Subject[subtitle]",
                        'id'    => 'subtitle',
                        'title' => '子标题',
                        'type'  => 'text',
                        'value' => old('Subject')['subtitle'] ? old('Subject')['subtitle'] : (isset($subject) && $subject->subtitle ? $subject->subtitle : ''),
                    ])
                    <div class="row">
                        <div class="col-lg-10 col-sm-12">
                            @include('admin.widget.textarea', [
                            'colsm' => '12',
                            'collg' => '12',
                            'name'  => "Subject[content]",
                            'id'    => 'summernote',
                            'title' => '',
                            'value' => old('Subject')['content'] ? old('Subject')['content'] : (isset($subject) && $subject->content ? $subject->content : ''),
                            ])
                        </div>