Return 条记录，其中 children 在 parents 下

Question

我正在检索这样的模型 $people = Person::with('children')->get(); 和这个 returns 我 dd($people);

Collection {#322 ▼
  #items: array:4 [▼
    0 => Person {#311 ▶}
      #relations: array:1 [▼
         "children" => Collection {#320 ▼
           #items: array:2 [▼
              0 => Child {#323 ▶}
              1 => Child {#324 ▶}
    1 => Person {#312 ▶}
    2 => Person {#313 ▶}
        #relations: array:1 [▼
         "children" => Collection {#320 ▼
           #items: array:2 [▼
              0 => Child {#323 ▶}
    3 => Person {#314 ▶}

但现在我正在尝试将其导出到 excel（Maatwebsite/Laravel-Excel 以查看）但我需要像这样（children 在他们的 parent 下），例如：

Collection {#322 ▼
  #items: array:6 [▼
    0 => Person {#311 ▶} // Parent 1
    1 => Child {#312 ▶} // Child of parent 1
    2 => Child {#313 ▶} // Child of parent 1
    3 => Person {#314 ▶} // Parent 2 - Single (no relation)
    4 => Person {#315 ▶} // Parent 3 
    5 => Child {#316 ▶} // Child of parent 3
    6 => Person {#314 ▶} // Parent 4 - Single (no relation)

我不确定如何执行此操作（Eloquent 或查询生成器）？

Answer 1

我没试过，但我猜这样的东西会起作用：

$c = collect([]);

foreach($people as $person)
{
    $children = $person->children;
    $c->add($person);        
    if(count($children) > 0)
    {
        foreach($children as $child)
        {
            $c->add($child);
        } 
    }
}

dd($c);