如何从 laravel 中的所有集合索引中获取值 照亮.

Question

>我必须从数据库查询数据以在 laravel 中使用 Illuminate，然后我想从该数组的所有索引中获取所有属性值。

array:36 [▼
  0 => RepaymentSchedule {#553 ▶}
  1 => RepaymentSchedule {#554 ▶}
  2 => RepaymentSchedule {#555 ▶}
  3 => RepaymentSchedule {#556 ▶}
  4 => RepaymentSchedule {#557 ▶}
  5 => RepaymentSchedule {#558 ▶}
  6 => RepaymentSchedule {#559 ▶}
  7 => RepaymentSchedule {#560 ▶}
  8 => RepaymentSchedule {#561 ▶}
  9 => RepaymentSchedule {#562 ▶}
  10 => RepaymentSchedule {#563 ▶}
  11 => RepaymentSchedule {#564 ▶}
  12 => RepaymentSchedule {#565 ▶}
  13 => RepaymentSchedule {#566 ▶}
  14 => RepaymentSchedule {#567 ▶}
  15 => RepaymentSchedule {#568 ▶}
  16 => RepaymentSchedule {#569 ▶}
  17 => RepaymentSchedule {#570 ▶}
  18 => RepaymentSchedule {#571 ▶}
  19 => RepaymentSchedule {#572 ▶}
  20 => RepaymentSchedule {#573 ▶}
  21 => RepaymentSchedule {#574 ▶}
  22 => RepaymentSchedule {#575 ▶}
  23 => RepaymentSchedule {#576 ▶}
  24 => RepaymentSchedule {#577 ▶}
  25 => RepaymentSchedule {#578 ▶}
  26 => RepaymentSchedule {#579 ▶}
  27 => RepaymentSchedule {#580 ▶}
  28 => RepaymentSchedule {#581 ▶}
  29 => RepaymentSchedule {#582 ▶}
  30 => RepaymentSchedule {#583 ▶}
  31 => RepaymentSchedule {#584 ▶}
  32 => RepaymentSchedule {#585 ▶}
  33 => RepaymentSchedule {#586 ▶}
  34 => RepaymentSchedule {#587 ▶}
  35 => RepaymentSchedule {#588 ▶}
]

我尝试使用波纹管

$collapsed = $loan->schedule->all();
  dd($collapsed);
  $collection = $collapsed->each(function ($item, $key) {
    dd($key);
  });

Answer 1

在 laravel 5.1 及更高版本中，您可以使用 Collection 对象的 pluck 方法：

$plucked = $collapsed->pluck('id');
dd($plucked->all());

文档：https://laravel.com/docs/5.2/collections#method-pluck

但是由于您使用的是 L5.0，这是不可能的，我建议您通过 PHP5 方法array_column函数来解决这个问题：

$ids = array_column($collapsed->toArray(), 'id');
dd($ids);

编辑：如果要检索多个属性，可以使用 ->lists() 方法：

$values = $loan->schedule->lists('id', 'interest', 'principal');
dd($values);