php - Laravel 集合包含

Question

我正在集合上使用 Laravel contains 方法 https://laravel.com/docs/5.3/collections#method-contains 。但这对我不起作用。

foreach ($this->options as $option) {
    if($options->contains($option->id)) {
        dd('test');
    }
}

dd($options); 看起来像这样:

Collection {#390
  #items: array:1 [
    0 => array:3 [
      0 => array:7 [
        "id" => 10
        "slug" => "test"
        "name" => "test"
        "poll_id" => 4
        "created_at" => "2016-11-12 20:42:42"
        "updated_at" => "2016-11-12 20:42:42"
        "votes" => []
      ]
      1 => array:7 [
        "id" => 11
        "slug" => "test-1"
        "name" => "test"
        "poll_id" => 4
        "created_at" => "2016-11-12 20:42:42"
        "updated_at" => "2016-11-12 20:42:42"
        "votes" => []
      ]
      2 => array:7 [
        "id" => 12
        "slug" => "test-2"
        "name" => "test"
        "poll_id" => 4
        "created_at" => "2016-11-12 20:42:42"
        "updated_at" => "2016-11-12 20:42:42"
        "votes" => []
      ]
    ]
  ]
}

dd($option->id);的结果是10。

可能出了什么问题？或者有更好的办法吗？

Answer 1

您应该将键/值对传递给 contains 方法，这将确定给定的对是否存在于集合中。使用contains()方法如下:

foreach ($this->options as $option) {
  // Pass key inside contains method
  if($option->contains('id', $option->id)) {
      dd('test');
  }
}