Laravel map 到群收

Question

我做 laravel map 分组并得到了这个

我希望它变成这样

 "Ilmu Pengetahuan Alam" => array:6 [▶
    [
      "2022-08-01" => "Hadir"
    ]
    [
      "2022-08-03" => "Sakit"
    ]
    [
      "2022-08-05" => "Hadir"
    ]
    [
      "2022-08-06" => "Hadir"
    ]
    [
      "2022-08-08" => "Hadir"
    ]
    [
      "2022-08-13" => "Hadir"
    ]
  ]
  "Pendidikan Pancasila dan Kewarganegaraan" => array:1 [
   [
      "2022-08-13" => "Hadir"
    ]
  ]

可能吗？ 并将本月的日期添加到不存在的数组中

Answer 1

使用https://laravel.com/docs/9.x/collections#method-groupby读取 laravel 文档

例子

$collection = collect([
['account_id' => 'account-x10', 'product' => 'Chair'],
['account_id' => 'account-x10', 'product' => 'Bookcase'],
['account_id' => 'account-x11', 'product' => 'Desk'],
]);



$grouped = $collection->groupBy('account_id');
 
$grouped->all();
 
/*
    [
        'account-x10' => [
            ['account_id' => 'account-x10', 'product' => 'Chair'],
            ['account_id' => 'account-x10', 'product' => 'Bookcase'],
        ],
        'account-x11' => [
            ['account_id' => 'account-x11', 'product' => 'Desk'],
        ],
    ]
*/