数据库关联

        $message_list=$this->message_model->where($map)->select();
        foreach($message_list as $key => $val ){
           $map1['id']=$val['bid'];
           $map2['id']=$val['uid'];
           $message_list[$key]['title']= $this->blog_model->where($map1)->getField('title');



        }

数据库关联