Laravel集合没有正确排序

Question

我尝试使用Laravel函数对我的收藏进行排序。

这是我的数据，例如：

$collection = 
 [
  {
    "total_earned": "31739",
    "total_spent": "0",
    "total_amount": "317390",
    "date": "2015-10-01"
  }, {
    "total_earned": "212622",
    "total_spent": "86943",
    "total_amount": "2213165",
    "date": "2015-12-01"
  }, {
    "total_earned": 0,
    "total_spent": 0,
    "total_amount": 0,
    "date": "2015-10-29"
  }, {
    "total_earned": 0,
    "total_spent": 0,
    "total_amount": 0,
    "date": "2015-10-30"
  }
];

当我尝试使用Laravel sortBy函数进行排序并返回时，它变成这样：

[{
    "total_earned": 0,
    "total_spent": 0,
    "total_amount": 0,
    "date": "2015-10-29"
}, {
    "total_earned": 0,
    "total_spent": 0,
    "total_amount": 0,
    "date": "2015-10-30"
}, {
    "total_earned": "212622",
    "total_spent": "86943",
    "total_amount": "2213165",
    "date": "2015-12-01"
}, {
    "total_earned": "31739",
    "total_spent": "0",
    "total_amount": "317390",
    "date": "2015-10-01"
}]

如您所见，日期2015-10-01在底部。 应该在2015-10-29之前。

我的代码进行排序：

return $transaction->sortBy('date')->values()->all();

这是一个错误还是某种假设？

---

更新我的整个代码：

 $transaction = Transaction::dateRange($startDate->format('Ym-d'), $endDate->format('Ym-d')) ->groupBy('merchant_branch_id', DB::raw('DATE(created_at)')) ->selectRaw('DATE(created_at) as date, SUM(point_earned) as total_earned, SUM(point_spent) as total_spent, FLOOR(SUM(amount)) as total_amount') ->orderBy('created_at') ->get(); $convert = $transaction->map(function($item, $key) { $date = Carbon::parse($item->date)->format('Ym-d'); return [$date]; }); $convert = $convert->toArray(); $period = new DatePeriod($startDate, new DateInterval('P1D'), $endDate); foreach ($period as $row) { $date = $row->format('Ym-d'); if (!in_array_r($date, $convert)) { $transaction->push(['date' => $date, 'total_earned' => 0, 'total_spent' => 0, 'total_amount' => 0]); } } $sorted = $transaction->sortBy('date')->values()->all(); return $sorted; 

Answer 1

万一其他人遇到同样的问题，您可以尝试从此答案https://stackoverflow.com/a/36170075/1208242使用以下代码：

$sorted = $transaction->sortBy(function($col)
{
    return $col;
})->values()->all();

它可能会给您日期错误的顺序（默认情况下，sortBy以“升序”排序，当使用Ymd格式的日期时，显然会返回降序），因此您可以改用sortByDesc()方法