lumen 数据库操作

一。接收值并分页展示
 $user_id = $request->getAttribute('route')->getArgument('id');
  $db = $this->db;
   $couponInfo = $db->table('wechat_api.user_coupon as uc')
            ->join('coupon as c', 'c.id', '=' ,'uc.coupon_id')
            ->where('uc.user_id', $user_id)
            ->select('uc.user_id','c.id','c.coupon_head',$db::raw("if(city_name='0','全国',city_name) as city,
                if(new_old_user='0','通用',if(new_old_user='1','新用户','老用户')) as new_old_user,
                group_concat(c.start_time,'~',c.end_time) as time,concat(uc.money, '元') as money"),
                'uc.created_time','uc.used_time')
            ->groupBy('uc.id')
            ->get();

$count = $couponInfo->count();
    return $response->withStatus(200)->withJson([
        'count'=> $count,
        'couponInfo' => $couponInfo->forPage($params['page'],$params['size'])
    ]);

二。检查今天的退款数和退款总金额
 /*检查退款数*/
    $today_refund = $db::table('balance_to_cash')
        ->whereRaw('date(created_at)=date(now())')
        ->select($db::raw('count(id) as today,sum(cash_money) as cash_money'))
        ->first();