选择标记上的必需参数不起作用

Question

我正在使用Laravel 7.0和Materialises Css开发股票系统，并且我需要以特定的形式表示所需的字段。我完成了此任务，而文本输入没有任何问题，但select没有。语法对我来说似乎是正确的，但是出了点问题，我不知道是什么。

<form action="{{route('produto.cadastrar')}}" method="post">
    {{csrf_field()}}
    <br>                                                                  
    <div class="row">
        <div class="col s1"></div>
        <div class="input-field col s4">
            <i class="material-icons prefix">plus_one</i>
            <input required type="number" placeholder="5" name="quantity">
            <label>Quantity <span class="important">*</span></label>
        </div>
        <div class="col s2"></div>
        <div class="input-field col s4">
            <i class="material-icons prefix">fitness_center</i>
            <select name="measure" required>
            <option value="" disabled selected>Choose the measure</option>
                @forelse($measure as $measure)
                <option value="{{$measure->measure}}">{{$measure->measure}}</option>
                @empty
                <option value="without measure">without measure</option>
                @endforelse
            </select>
            <label>measure<span class="important">*</span></label>
        </div>
        <div class="col s1"></div>
    </div>                                                                
    <div class="row valign center">
        <button class="btn waves-effect waves-light blue darken-4"><b>Submit
                <i class="material-icons right">send</i>
        </button>
        <br>
        <br>
        <label ><span class="important">*</span> Required Field</label>
    </div>

    <br>
</form>

Answer 1

将disable和readonly属性添加到您的选项标签中

 @forelse($measure as $measure)
            <option value="{{$measure->measure}}">{{$measure->measure}}</option>
            @empty
            <option disable readonly>without measure</option>
            @endforelse