tken/application/admin/controller/Topicdongtai.php

<?php

namespace app\admin\controller;

use app\common\controller\Backend;
use think\Db;
/**
 * 用户动态
 *
 * @icon fa fa-circle-o
 */
class Topicdongtai extends Backend
{
    
    /**
     * Topicdongtai模型对象
     * @var \app\admin\model\Topicdongtai
     */
    protected $model = null;

    public function _initialize()
    {
        parent::_initialize();
        $this->model = new \app\admin\model\Topicdongtai;
        $this->view->assign("typeList", $this->model->getTypeList());
        $this->view->assign("isPublicList", $this->model->getIsPublicList());
    }

    public function import()
    {
        parent::import();
    }

    /**
     * 默认生成的控制器所继承的父类中有index/add/edit/del/multi五个基础方法、destroy/restore/recyclebin三个回收站方法
     * 因此在当前控制器中可不用编写增删改查的代码,除非需要自己控制这部分逻辑
     * 需要将application/admin/library/traits/Backend.php中对应的方法复制到当前控制器,然后进行修改
     */
    

    /**
     * 查看
     */
    public function index()
    {
        //当前是否为关联查询
        $this->relationSearch = true;
        //设置过滤方法
        $this->request->filter(['strip_tags', 'trim']);
        if ($this->request->isAjax()) {
            //如果发送的来源是Selectpage，则转发到Selectpage
            if ($this->request->request('keyField')) {
                return $this->selectpage();
            }
            list($where, $sort, $order, $offset, $limit) = $this->buildparams();

            $list = $this->model
                    ->with(['user','topichub'])
                    ->where($where)
                    ->order($sort, $order)
                    ->paginate($limit);

            foreach ($list as $row) {
                
                $row->getRelation('user')->visible(['username']);
				$row->getRelation('topichub')->visible(['name']);
            }

            $result = array("total" => $list->total(), "rows" => $list->items());

            return json($result);
        }
        return $this->view->fetch();
    }

    /**
     * 删除
     */
    public function del($ids = "")
    {
        if (!$this->request->isPost()) {
            $this->error(__("Invalid parameters"));
        }
        $ids = $ids ? $ids : $this->request->post("ids");
        if ($ids) {
            $pk = $this->model->getPk();
            $adminIds = $this->getDataLimitAdminIds();
            if (is_array($adminIds)) {
                $this->model->where($this->dataLimitField, 'in', $adminIds);
            }
            $list = $this->model->where($pk, 'in', $ids)->select();

            $count = 0;
            Db::startTrans();
            try {
                foreach ($list as $k => $v) {
                    $count ++;

                    $this->delete_dongtai($v['id']);
                }
                Db::commit();
            } catch (PDOException $e) {
                Db::rollback();
                $this->error($e->getMessage());
            } catch (Exception $e) {
                Db::rollback();
                $this->error($e->getMessage());
            }
            if ($count) {
                $this->success();
            } else {
                $this->error(__('No rows were deleted'));
            }
        }
        $this->error(__('Parameter %s can not be empty', 'ids'));
    }

    //动态删除
    public function delete_dongtai($id){

        $where['id'] = $id;
        $dongtai = Db::name('topic_dongtai')->field('id,topic_ids')->where($where)->find();
        if (empty($dongtai)) {
            return true;
        }

        $delRes = Db::name('topic_dongtai')->where('id',$id)->delete();

        //话题少一个贴
        if (!empty($dongtai['topic_ids'])) {
            $res = Db::name('topic_hub')->where('id','IN',$dongtai['topic_ids'])->setDec('t_number');
        }
        //删除对应的评论，
        Db::name('topic_dongtai_answer')->where('dt_id',$id)->delete();
        //点赞，
        Db::name('topic_dongtai_good')->where('dt_id',$id)->delete();
        //评论点赞
        Db::name('topic_answer_good')->where('dt_id',$id)->delete();



    }

}