$model = $this->model;

        // 查询是否有搜索参数

        $search = input('?get.search') ? trim(input('get.search')) : false;

        $list = $model;

        if($search) {

            // 查询相关标签

            $searchTags = model('tag')

                    ->alias('a')

                    ->join('tagmap b', 'b.tagid = a.id')

                    ->where('a.name', 'like', '%' . $search . '%')

                    ->column('b.tid');

            $tagsTeacherIdsArr = preg_grep('/\d+/' ,$searchTags);

            $tagsTeacherIds = join(',' ,array_unique($tagsTeacherIdsArr));
　　　　　　　　// 闭包搜索 内容

            $list = $list->where(function ($query) use ($search, $tagsTeacherIds) {

                $query->whereOr('id','in',$tagsTeacherIds)

                    ->whereOr('name', 'like', '%' . $search . '%')

                    ->whereOr('desc', 'like', '%' . $search . '%');

            });

        }
　　　　　　// 必要条件

        $list = $list->where([

                'ispublic' => 1,

                'isdel' => 0

            ])

            ->order('sort','desc')

            ->paginate(15,false,[

                'query' => request()->param()

            ]);