使用 JavaScript 从 Laravel 中的动态输入中获取旧值？

Posted 2023-03-14

【中文标题】使用 JavaScript 从 Laravel 中的动态输入中获取旧值？

【英文标题】：Get old value from dynamic input in Laravel with JavaScript?

【发布时间】：2021-04-10 02:20:49

【问题描述】：

我想从 Laravel 的动态输入中获取旧值。如果是常规输入，我只需要 old ('name') 。但是如果输入是动态的呢？

查看

<tr>
    <td>
        <input type="text" name="name_progress[]"
               value=" old('name_progress[]') "
               placeholder="Enter name" class="form-control"/>
    </td>
    <td>
        <input type="text" name="payment_percentage[]"
               value=" old('payment_percentage[]') "
               placeholder="Enter % invoice" class="form-control"/>
    </td>
    <td>
        <a type="button" class="btn btn-danger remove-tr">-</a>
    </td>
</tr>

JavaScript

<script type="text/javascript">
    $("#add-btn").click(function () 
        var tr = '<tr>' +
            '<td>' +
            '<input type="text" name="name_progress[]" ' +
            'placeholder="Enter name" class="form-control" /></td>' +
            '<td><input type = "text" name = "payment_percentage[]" ' +
            'placeholder = "Enter per_invoice" class = "form-control" />' +
            '</td>' +
            '<td><a type="button" class="btn btn-danger remove-tr">-</a></td>' +
            '</tr>';
        $("#dynamicProgress").append(tr);
    );
    $(document).on('click', '.remove-tr', function () 
        $(this).parents('tr').remove();
    );
</script>

【参考方案1】：

由于 name_progress 和 payment_percentage 字段是数组，您可以简单地循环遍历旧的输入值。

@forelse (old('name_progress', []) as $i => $name_progress)
    <tr>
        <td>
            <input type="text" name="name_progress[]" value=" $name_progress " placeholder="Enter name" class="form-control" />
        </td>
        <td>
            <input type="text" name="payment_percentage[]" value=" old('payment_percentage')[$i] " placeholder="Enter % invoice" class="form-control" />
        </td>
        <td>
            <a type="button" class="btn btn-danger remove-tr">-</a>
        </td>
    </tr>
@empty
    <tr>
        <td>
            <input type="text" name="name_progress[]" placeholder="Enter name" class="form-control" />
        </td>
        <td>
            <input type="text" name="payment_percentage[]" placeholder="Enter % invoice" class="form-control" />
        </td>
        <td>
            <a type="button" class="btn btn-danger remove-tr">-</a>
        </td>
    </tr>
@endforelse

如果old('name_progress') 为空或null，将显示具有空值的初始字段。