如何在 Laravel 中重定向后设置选择值

Question

我是 Laravel 的新手，我试图将 select 的值设置为从我的控制器返回的值。我不明白为什么它不会改变价值显示.blade.php<div class="container d-flex justify-content-center">    <form action="{{ action('ReportController@show', ['id' => 'month']) }}" class="month-form" method="GET">        <select name="month" id="month" class="custom-select form-input month-select">            <option value="01">January</option>            <option value="02">February</option>            <option value="03">March</option>            <option value="04">April</option>            <option value="05">May</option>            <option value="06">June</option>            <option value="07">July</option>            <option value="08">August</option>            <option value="09">September</option>            <option value="10">October</option>            <option value="11">November</option>            <option value="12">December</option>        </select>        <button class="btn btn-secondary">Generate Report</button>    </form></div>控制器 功能展示（）$month_number = request('month');$month_name = date("M", mktime(0, 0, 0, $month_number, 1));return view('reports.show', compact('month_number', 'month_name'));这是我的表单 当我单击生成按钮时，它会返回到此页面并且值将是我之前选择的那个。因此，如果我选择 May，然后选择生成按钮，新页面将是 May，而不是默认值。编辑：我也试过使用 jQuery，但它只会让我的表单空白，根本不会给它任何价值$(document).ready(function(){   var month = @json($month_name ?? '');   $('#month').val(month);});

Answer 1

如果我清楚地理解你的问题，那么我想你想要这样的东西

<div class="container d-flex justify-content-center">

<form action="{{ action('ReportController@show', ['id' => 'month']) }}" class="month-form" method="GET">

    <select name="month" id="month" class="custom-select form-input month-select">

        <option value="01" @isset($month_number) {{ $month_number == 01 ? 'selected' : '' }} @endisset>January</option>

        <option value="02" @isset($month_number) {{ $month_number == 02 ? 'selected' : '' }} @endisset>February</option>

        <option value="03" @isset($month_number) {{ $month_number == 03 ? 'selected' : '' }} @endisset>March</option>

        <option value="04" @isset($month_number) {{ $month_number == 04 ? 'selected' : '' }} @endisset>April</option>

        <option value="05" @isset($month_number) {{ $month_number == 05 ? 'selected' : '' }} @endisset>May</option>

        <option value="06" @isset($month_number) {{ $month_number == 06 ? 'selected' : '' }} @endisset>June</option>

        <option value="07" @isset($month_number) {{ $month_number == 07 ? 'selected' : '' }} @endisset>July</option>

        <option value="08" @isset($month_number) {{ $month_number == 08 ? 'selected' : '' }} @endisset>August</option>

        <option value="09" @isset($month_number) {{ $month_number == 09 ? 'selected' : '' }} @endisset>September</option>

        <option value="10" @isset($month_number) {{ $month_number == 10 ? 'selected' : '' }} @endisset>October</option>

        <option value="11" @isset($month_number) {{ $month_number == 11 ? 'selected' : '' }} @endisset>November</option>

        <option value="12" @isset($month_number) {{ $month_number == 12 ? 'selected' : '' }} @endisset>December</option>

    </select>

    <button class="btn btn-secondary">Generate Report</button>

</form>

如果它不起作用然后尝试更改01为"01"等等...