Laravel集合包含 [英] Laravel collection contains

问题描述

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

I'm using the Laravel contains method on a collection https://laravel.com/docs/5.3/collections#method-contains. But it does not work for me.

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.

可能是什么问题?还是有更好的方法?

What could be wrong? Or is there a better way?

推荐答案

您应该将键/值对传递给contains方法，该方法将 确定给定对是否存在于集合中.

You should pass a key / value pair to the contains method, which will determine if the given pair exists in the collection.

您应该以这种方式使用 contains() 方法:

You should use contains() method in this way:

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

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