laravel5.1 按日期排序结果 (created_at)

Question

我想按日期 (created_at) 订购我的 ticket_replies。有关如何按日期排序的 ticket_replies 的任何提示（最旧的排在最前面，至少是最新的）。我是否需要使用 sortByDesc() 或 orderBy() 语句？表格设计：

tickets: |id|supp_id|title|user_id|...

ticket_replies: |id|ticket_id|user_id|text|created_at

files: |id|ticket_replie_id|name

控制器：

            $ticket = Auth::user()->tickets()->join("ticket_replies", "ticket.id", "=", "ticket_replies.ticket_id")->where('id', $id)->with(['ticket_replie.file'])->orderBy('ticket_replies.created_at')->firstOrFail();

return view('protected.ticketDetail', compact('ticket'));

查看：

<div class="container">

ID: {{$ticket->id}}
title: {{ $ticket->title}}<br>
status: {{ returnStatus($ticket->status) }}<br>
Ticket created: {{ $ticket->created_at }}<br>


@if (!$ticket->supporter)
    supporter:-<br></br></br>
@else
    supporter  {{ $ticket->supporter->username }}<br></br>
@endif

@foreach($ticket->ticket_replie as $reply)
    @if ($reply->file == null)
        reply text: {{ $reply->text }}</br>
    @else
        reply text: {{ $reply->text }}</br>
        file: <a href="/path/to/file/{!! $reply->file->name !!}">Download file</a><br>
    @endif
reply created at: {{$reply->created_at}}</br></br>
@endforeach 

</div>

当我运行这段代码失败时说：

SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'id' in where clause is ambiguous (SQL: select * from `tickets` inner join `ticket_replies` on `ticket`.`id` = `ticket_replies`.`ticket_id` where `tickets`.`user_id` = 1 and `tickets`.`user_id` is not null and `id` = 43 order by `ticket_replies`.`created_at` asc limit 1)

我是否需要为此修改我的 ticket_replies 模型，或者我是否需要采取其他方法来解决这个问题？

Answer 1

你应该添加类似

的内容

join("ticket_replies", "ticket.id", "=", "ticket_replies.ticket_id")

您的查询。否则，您不会从 ticket_replies table 获得任何数据，因为 with() 会为您创建对 select 所有其他数据的单独查询。

另一种选择是将其与 with() 子查询一起使用：

->with([
                'ticket_replies' => function ($query) {
                    return $query->orderBy('created_at', 'desc');
                }
            ])

取决于你需要什么。

laravel5.1 按日期排序结果 (created_at)

laravel5.1 order result by date (created_at)

mysql

sql-order-by

eloquent

laravel-5.1