Laravel groupBy 返回项目数组而不是使用日期作为键

Posted 2023-03-14

【中文标题】Laravel groupBy 返回项目数组而不是使用日期作为键

【英文标题】：Laravel groupBy return array of items instead of using date for key

【发布时间】：2021-06-03 07:13:21

【问题描述】：

我正在使用 Laravel groupBy 方法来格式化我的数据并将它们分组到句点中，但是，我想更改返回结果的方式。而不是使用created_at 作为数组项的键，我不希望有一个键，而是将那个键移到返回的结果中......

以下代码将返回：

"results": [
    
        "2021-03-04": 
            "event_category": "category",
            "event_action": "action",
            "event_count": "544",
            "period_from": "2021-03-04 00:00:00",
            "period_to": "2021-03-04 10:30:02",
            "created_at": "2021-03-04 10:30:06"
        ,
        "2021-03-03": 
            "event_category": "category",
            "event_action": "action",
            "event_count": "5337",
            "period_from": "2021-03-03 00:00:00",
            "period_to": "2021-03-03 23:57:03",
            "created_at": "2021-03-03 23:57:08"
        
    
]

看起来是这样的

$res = DB::table('my_table')
         ->select('event_category', 'event_action', 'event_count', 'period_from', 'period_to', 'created_at')
         ->where([["event_category", "category"], ["event_action", "action"], ["period_from", ">=", "2021-03-01"], ["period_to", "<=", "2021-03-04 22:00:00"]])
         ->orderBy('created_at, 'desc')
         ->get();

$results = $res->groupBy(function ($item, $key) use ($findable) 
  $date = Carbon::parse($item->created_at);
  return $date->format($findable['groupByFormat']);
);

$results = $results->map(function ($item, $key) 
  return $item[0];
);

$res = $results;

我想回来...

"results": [
    [
        "event_category": "category",
        "event_action": "action",
        "event_count": "544",
        "period_from": "2021-03-04 00:00:00",
        "period_to": "2021-03-04 10:30:02",
        "created_at": "2021-03-04 10:30:06",
        "new_created_at": '2021-03-04'
    ],
    [
        "event_category": "category",
        "event_action": "action",
        "event_count": "5337",
        "period_from": "2021-03-03 00:00:00",
        "period_to": "2021-03-03 23:57:03",
        "created_at": "2021-03-03 23:57:08",
        "new_created_at": '2021-03-03'
    ]
]

我尝试删除我的初始地图，但不确定如何在保留分组的同时实现这种格式

【问题讨论】：

你试过 Flatten 方法了吗？

【参考方案1】：

尝试以下方法：

$results = $results->map(function ($items, $key) 
    return array_merge($items, ['new_created_at' => $key]);
)->values();

最后对 values() 的调用只返回集合的值，以便它以数字而不是日期作为键。

Illuminate\Support\Collection #337 ▼
  #items: array:2 [▼
    0 => array:7 [▼
      "event_category" => "category"
      "event_action" => "action"
      "event_count" => "544"
      "period_from" => "2021-03-04 00:00:00"
      "period_to" => "2021-03-04 10:30:02"
      "created_at" => "2021-03-04 10:30:06"
      "new_created_at" => "2021-03-04"
    ]
    1 => array:7 [▶]
  ]