laravel admin form 里面的table组件里面使用select多级联动,二级不出现bug修复

D:\WWW\xxxx\vendor\encore\laravel-admin\src\Form\Field\Select.php

public function load($field, $sourceUrl, $idField = 'id', $textField = 'text', bool $allowClear = true)
{
    if (Str::contains($field, '.')) {
        $field = $this->formatName($field);
        $class = str_replace(['[', ']'], '_', $field);
    } else {
        $class = $field;
    }

    $placeholder = json_encode([
        'id'   => '',
        'text' => trans('admin.choose'),
    ]);

    $strAllowClear = var_export($allowClear, true);
    $script = <<<EOT
$(document).off('change', "{$this->getElementClassSelector()}");
$(document).on('change', "{$this->getElementClassSelector()}", function () {
var target = $(this).closest('.fields-group').find(".$class");
$.get("$sourceUrl",{q : this.value}, function (data) {
    target.find("option").remove();
    $(target).select2({
        placeholder: $placeholder,
        allowClear: $strAllowClear,
        data: $.map(data, function (d) {
            d.id = d.$idField;
            d.text = d.$textField;
            return d;
        })
    });
    if (target.data('value')) {
        $(target).val(target.data('value').split(','));// 这里需要分解存储的值为数组才能支持多选
    }
    $(target).trigger('change');
});
});
$("{$this->getElementClassSelector()}").trigger('change'); // 加上这一行才可以支持自动加载所有的可选值
EOT;
    Admin::script($script);

    return $this;
}