Laravel collection contains

问题

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); looks like this:

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" => []
      ]
    ]
  ]
}

Result of dd($option->id); is 10.

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

回答1:

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

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');
  }
}

Hope this helps

回答2:

Use the following, which tells Laravel you want to match the 'id':

$options->contains('id', $option->id);

Docs

回答3:

foreach ($this->options as $option) {
    if(!$options->flatten(1)->where('id',$option->id)->isEmpty()) {
        dd('test');
    }
}

来源：https://stackoverflow.com/questions/40566972/laravel-collection-contains

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php

laravel

collections