php - 重新排列对象PHP

Question

我有一个产品对象列表，看起来像这样:

Product Object
(
    [id:private] => 1688115
    [categoryId:private] => 1
    [merchant:private] => theredshop
    [name:private] => Pepsi Max Cans 6 x 375mL
)

每次获取数据，我都会获取15条记录(Im使用ElasticSearch)，因为产品订单的15条记录是按商家名称排列的，因此将1个商家堆叠在顶部，然后转到下一个商家。

我想做的是将对象结果顺序“洗牌”到至少1个商家显示一次，然后再放置另一个商家。例如，这是我当前的结果:

merchant    name
theredshop  pepsi
theredshop  lorem
theredshop  ipsum

我想要的是

merchant    name
theredshop  pepsi
sevel       lorem
bluecircle  ipsum

我知道如何通过循环和检查已加载的商人名称来安排结果。但是如何重新排列对象结果呢？还是我应该重新创建对象？

Answer 1

假设有一个记录表$products，它可以这样用PHP编写:

// restructure array as merchants having nested record sets
$merchants = [];
foreach(array_unique(array_column($products, 'merchant')) as $merchant)
  $merchants[$merchant] = array_values(array_filter($products, function($v)use($merchant){ return $v->merchant === $merchant;}));

// itererate over indexes up do max. products per merchant and a add a product of
// each merchant having a record with that index
$max_count = max(array_map(function($v){return count($v);}, $merchants));
$new_order = [];

for($i = 0; $i<$max_count; $i++)
  foreach ($merchants as $merchant)
    if($item = $merchant[$i] ?? false)
      $new_order[] = $item;


var_dump($new_order);

根据您的评论，您似乎有一个称为“列表”的对象，如下所示:

$products_object = (object)
  [
    (object)[
      'merchant' => 'theredshop',
      'name'     => 'pepsi',
    ],
    (object)[
      'merchant' => 'sevel',
      'name'     => 'pepsi',
    ],
    (object)[
      'merchant' => 'sevel',
      'name'     => 'lorem',
    ],

    (object)[
      'merchant' => 'sevel',
      'name'     => 'ipsum',
    ],

    (object)[
      'merchant' => 'bluecircle',
      'name'     => 'ipsum',
    ],

  ];

首先将其转换为数组，以便对其上的数组函数进行操作:

$products = (array) $products_object;