blog_tp6/app/sys/controller/Category.php

<?php
declare(strict_types=1);
/**
 * +----------------------------------------------------------------------
 * | 栏目控制制器
 * +----------------------------------------------------------------------
 */

namespace app\sys\controller;

// 引入框架内置类
use think\facade\View;

use app\common\model\Category as CategoryModel;

class Category extends Base
{
    protected  $modelName = "Category";

    public function index()
    {
        $list = CategoryModel::getList(['order'=>'id DESC']);

        $list = list_tree($list, 'id', 'parent_id');

        View::assign('list', $list);

        View::assign('types', ['','一般','目录','单页','锚点','链接']);

        return View::fetch();
    }

    /**
     * 新增 or 修改
     * @param int $id  info id 
     * @return mix 
     */
    public function save($id = 0)
    {
        if ($id != 0) {
            $data = CategoryModel::find($id);
        } else {
            $data = new CategoryModel();
            $data->is_nav = 1;
        }

        View::assign('data', $data);

        $list = list_tree(CategoryModel::select());

        View::assign('list', $list);

        return View::fetch();
    }

    public function doSave($id)
    {
        if ($this->app->request->isPost()) {
            $params = $this->app->request->param();

            if ($params['name'] == '') {
                $this->error("名称不能为空");
            }

            try {
                $id = $params['id'];
                unset($params['id']);

                if ($id != 0) {
                    CategoryModel::update($params, ['id' => $id]);
                } else {
                    CategoryModel::create($params);
                }
            } catch (\Exception $e) {
                $msg = $e->getMessage();

                $this->error("错误提示:" . $msg);
            }
            $this->success('操作成功', (string)url('index'));
        }
    }

    // 删除
    public function delete($id)
    {
        if ($this->app->request->isPost()) {
            if (CategoryModel::where('parent_id', $id)->value('id')) {
                return ['code' => 0, 'msg' => '子栏目不为空, 若要删除请先清空子栏目'];
            }

            return CategoryModel::del($id);
        }
    }
}