Question

我有一个传统的Laravel应用程序。在其中一种方法中，他们使用原始SQL对查询进行了编码，如下所示：

$sql =  "select * from (select `o`.`order_id`, `o`.`order_status_id`, `o`.`business_type`, 
            `o`.`university_name`, `o`.`first_name`, `o`.`last_name`, `o`.`email`, `o`.`telephone`, `o`.`enrollment_no`, 
            `o`.`application_no`, `o`.`date_added`, `o`.`term_id`, `os`.`name` as `order_status`, `u`.`id` as `user_id`,`cso`.`last_call_time`,`cso`.`next_call_time`,
            `oss`.`name` as `order_sub_status`, `o`.`total`, `o`.`product_id`, `bm`.`batch_name`, `o`.`university_enrollment_no`,
            `ptb`.`current_term_id` as `current_batch_term`, `tm`.`type` as `term_type`, `tm`.`value`,`u`.`name` as `username`
            from `order` as `o` 
            inner join `order_status` as `os` on `os`.`order_status_id` = `o`.`order_status_id` 
            left join `call_schedule_order` as `cso` on `cso`.`order_id`= `o`.`order_id`
            left join `order_sub_status` as `oss` on `oss`.`order_sub_status_id` = `o`.`order_sub_status_id` left join `batch_master` as `bm` on `bm`.`batch_id` = `o`.`batch_id` 
            left join `term_master` as `tm` on `tm`.`term_id` = `o`.`term_id` left join `order_dropout_status` as `ods` on `ods`.`reason_id` = `o`.`reason_id` left 
            join `product_term_batch` as `ptb` on `ptb`.`batch_id` = `o`.`batch_id` and `ptb`.`product_id` = `o`.`product_id`
            left join collection_user as cu on cu.order_id = o.order_id
            left join users as u on u.id = cu.user_id
            where `o`.`order_status_id` in (".implode(',',$order_status).")";

            //$sql .= "and cu.payment_done != 'yes'";

    if($is_manager == 'no')
    {
        $sql .= "and u.id = '".$user_id."'";
    }           

    if(isset($filter['order_id']) and $filter['order_id']!=''  ){
        $sql .= " and o.order_id = '".$filter['order_id']."'";
    }

    if(isset($filter['application_no']) and $filter['application_no']!=''  ){
        $sql .= " and o.application_no = '".$filter['application_no']."'";

    }

    if(isset($filter['enrollment_no']) and $filter['enrollment_no']!=''  ){
        $sql .= " and o.enrollment_no = '".$filter['enrollment_no']."'";
    }

    if(isset($filter['university_enrollment_no']) and $filter['university_enrollment_no']!=''  ){
        //$sql->where('o.university_enrollment_no','LIKE','%'.$filter['university_enrollment_no'].'%');
        $sql .= " and o.university_enrollment_no = '".$filter['university_enrollment_no']."'";
    }

    if(isset($filter['university_id']) and $filter['university_id']!=''  ){
        //$sql->where('o.university_id','=',$filter['university_id']);
        $sql .= " and o.university_id = '".$filter['university_id']."'";
    }

    if(isset($filter['name']) and $filter['name']!=''  ){

        $sql .= " and (o.first_name LIKE '%".$filter['name']."%'
                    or o.last_name LIKE '%".$filter['name']."%')";
    }

    if(isset($filter['phone']) and $filter['phone']!=''  ){
        $sql .= " and o.telephone LIKE '%".$filter['phone']."%'";
    }

    if(isset($filter['email']) and $filter['email']!=''  ){
        $sql .= " and o.email LIKE '%".$filter['email']."%'";
    }

    if(isset($filter['order_status_id']) and $filter['order_status_id']!=''  ){
        $sql .= " and o.order_status_id = '".$filter['order_status_id']."'";
    }

    if(isset($filter['batch'])){
        $sql .= " and bm.batch_id in (".implode(',',$filter['batch']).")";
    }

    if(isset($filter['order_status'])){
        $sql .= " and o.order_status_id in (".implode(',',$filter['order_status']).")";
    }

    if(isset($filter['order_sub_status'])){
        $sql .= " and o.order_sub_status_id in (".implode(',',$filter['order_sub_status']).")";
    }

    if(isset($filter['user'])){
        $sql .= " and u.id in (".implode(',',$filter['user']).")";
    }

    if(isset($filter['due_calls'])){
        $time = date('Y-m-d H:i:s');
        $sql .= " and cso.user_id = '".$user_id."'";
        $sql .= " and cso.next_call_time < '".$time."'";
     }

    if( isset($filter['scheduled_call']) and $filter['scheduled_call']!='' and $filter['scheduled_call'] == 'show' ){
        $sql .= " and cso.user_id = '".$user_id."'";
        $sql .= " and cso.next_call_time IS NOT NULL";
        $sql .= " order by `cso`.`updatedAt` asc";
    }

    if( isset($filter['call_status_id']) and $filter['call_status_id']!=''  ){
        $sql .= " and cso.user_id = '".$user_id."'";
        $sql .= " and cso.call_status_id NOT IN (1,2,5,6,9,10,12)";
        $sql .= " order by `cso`.`updatedAt` asc";

    }

    if( isset($filter['UNSCH_call_status_id']) and $filter['UNSCH_call_status_id']!=''  ){
        $sql .= " and cso.user_id = '".$user_id."'";
        $sql .= " and cso.call_status_id IN (1,2,5,6,9,10,12)";
        $sql .= " order by `cso`.`updatedAt` asc";

    }

    if(!isset($filter['UNSCH_call_status_id']) && !isset($filter['call_status_id']) && !isset($filter['scheduled_call']))
    $sql .= " order by `o`.`order_id` asc";

    $sql .= ") as x
             group by x.order_id LIMIT ".$page.",".$limit;

$applicants = DB::Select($sql);
$applicants = Paginator::make($applicants, count($applicants), $limit);
return $applicants;

但是，当我尝试回复$applicants->links()时，没有任何内容被打印出来。

如果我更改了限制大小（如下所示），它会显示链接，尽管链接不正确。

$applicants = Paginator::make($applicants, count($applicants), $limit - 10);

我该如何解决这个问题？

Answer 1

根据documentation，Paginator::make的参数为

Paginator::make($items, $totalItems, $perPage);

为什么第一个版本没有显示任何页面是有道理的;由于您的查询具有原始查询应用的限制，因此申请人的数量（第二个参数）将与第一个参数中的项目数相匹配，因此它将假设所有项目都适合一个页面。

我建议不要手动创建Paginator，而是建议直接在查询上调用paginate。

$applicants = DB::table('Oder')
    ->where('order_id', $order_id)
    ->paginate(10); // replacing 10 with your items-per-page

return $applicants;

分页在Laravel中不起作用

1 个答案: