在 laravel 5.4 中的整数上调用成员函数 whereBetween()？

Question

我试图在两个不同的日期之间使用 whereBetween，但出现错误 "Call to a member function whereBetween() on integer"。我正在使用 bootstrap datepicker 从用户那里获取 2 个日期输入。我的代码如下：

我的表格如下：

<div class="form-group">
 <label for="start_date">From:</label><input type="text" name="startdate" id="startdate">
</div>
<div class="form-group">
 <label for="enddate">To:</label><input type="text" id="enddate" name="enddate">
</div>

我的查询如下：

$client_ids = Array
              (
                 [0] => 1
                 [1] => 5
               )
$start = 2017-06-01;
$end = 2017-06-02;

$results = DB::table('lead_audit AS l')
             ->leftjoin('suppliers AS s', 's.id', '=', 'l.supplier_id')
             ->leftjoin('campaigns AS c', 'c.id', '=', 'l.campaign_id')
             ->select('s.name AS Supplier', 'c.name AS Campaign', 'l.disposition AS Disposition')
             ->count()
             ->whereBetween('l.received', [$start, $end])
             ->whereIn('l.client_id', $client_ids)
             ->groupBy('s.name', 'c.name', 'l.disposition')
             ->orderBy('s.name')
             ->orderBy('c.name')
             ->orderBy('l.disposition')
             ->get();

我用谷歌搜索了一下，我尝试了如下 "Wrap the dates in Carbon objects" 的解决方案在我的控制器顶部，我已经放置了这一行 "use Carbon\Carbon;" 并更改了 whereBetween 处的查询，如下所示：

->whereBetween('l.received', [new Carbon($start), new Carbon($end)])

但运气不好，再次出现与 "Call to a member function whereBetween() on integer" 相同的错误。我也怀疑上面的完整查询的顺序是否正确？有人可以帮我解决这个问题吗？谢谢

Answer 1

问题是 ->count() 后跟 ->whereBetween()。

函数 count() 给出 select() 的行数，因此它 returns 是一个整数。

您必须删除 ->count() 并且查询应该可以工作。如果您想要查询中的行数，您可以执行以下操作：

$results = DB::table('lead_audit AS l')
         ->leftjoin('suppliers AS s', 's.id', '=', 'l.supplier_id')
         ->leftjoin('campaigns AS c', 'c.id', '=', 'l.campaign_id')
         ->select('s.name AS Supplier', 'c.name AS Campaign', 'l.disposition AS Disposition')
         ->whereBetween('l.received', [$start, $end])
         ->whereIn('l.client_id', $client_ids)
         ->groupBy('s.name', 'c.name', 'l.disposition')
         ->orderBy('s.name')
         ->orderBy('c.name')
         ->orderBy('l.disposition')
         ->get();
$num_rows = count($results);

The query builder also provides a variety of aggregate methods such as count, max, min, avg, and sum. You may call any of these methods after constructing your query.
source: https://laravel.com/docs/5.4/queries#aggregates

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