添加时，为字段设置默认值

<?php
namespace app\model;
use think\db\Query;
use tpScriptVueCurd\base\model\BaseModel;
use tpScriptVueCurd\field\RadioField;
use tpScriptVueCurd\field\StringField;
use tpScriptVueCurd\FieldCollection;
use tpScriptVueCurd\ModelField;
class User extends BaseModel
{
    /**
     * 表字段配置
     * @return FieldCollection
     */
    public function fields(): FieldCollection
    {
        $nameField=StringField::init('name','姓名');
        $nameField->pushFieldDo()->setEditShowDo(function (BaseModel &$info,?BaseModel $base,ModelField $field,bool $isStepNext){
            if(empty($info->id)){//如果是添加数据，设置姓名默认为 张三
                $info[$field->name()]='张三';
            }
        });
        $sexField=RadioField::init('sex', '性别')->items(['男','女']);
        $sexField->pushFieldDo()->setIndexFilterBeforeDo(function (ModelField $field,Query $query,array &$filterData){
            if(empty($info->id)){//如果是添加数据，设置性别默认为 男
                $info[$field->name()]='男';
            }
        });
        return new FieldCollection([
            $nameField,
            $sexField,
        ]);
    }
}