laravel collection remove item

Question

I have the following Collection

     Collection {#430 ▼
  #items: array:54 [▼
    0 => {#435 ▼
      +"name": "Persona 5"
      +"cover": "cover_persona-5_playstation-3.png"
      +"bio": "This is a syno"
      +"all_nb_rank": null
      +"platform_name": "Sony Playstation 3"
      +"tag_name": "RPG"
      +"developper": "Deep Silver"
      +"publisher": "Atlus"
    }
    1 => {#437 ▼
      +"name": "Persona 5"
      +"cover": "cover_persona-5_playstation-3.png"
      +"bio": "This is a syno"
      +"all_nb_rank": null
      +"platform_name": "Sony Playstation 3"
      +"tag_name": "Turn based"
      +"developper": "Deep Silver"
      +"publisher": "Atlus"
    }
    2 => {#436 ▼
      +"name": "Persona 5"
      +"cover": "cover_persona-5_playstation-3.png"
      +"bio": "This is a syno"
      +"all_nb_rank": null
      +"platform_name": "Sony Playstation 3"
      +"tag_name": "Simulation"
      +"developper": "Deep Silver"
      +"publisher": "Atlus"
    }
//

I'd like to get into another collection the "tag_name" line and then delete it from the main collection, and remove the duplicates values in order to get something like this :

     Collection {#430 ▼
  #items: array:1 [▼
    0 => {#435 ▼
      +"name": "Persona 5"
      +"cover": "cover_persona-5_playstation-3.png"
      +"bio": "This is a syno"
      +"all_nb_rank": null
      +"platform_name": "Sony Playstation 3"
      +"developper": "Deep Silver"
      +"publisher": "Atlus"
    }

    Collection {#490 ▼
  #items: array:3 [▼
    0 => "RPG"
    1 => "Turn based"
    2 => "Simulation"
  ]
}

I already manage to get the "tag_name" line into another Collection by using

$tags = $collection->pluck('tag_name');

I also plan on using the unique() collection method in order merge the duplicates values.

But I don't know how I should process in order to remove the "tag_name" from the main collection.

I tried to use the forget() and slice() method but it doesn't work. I know I can make it into a simple array and then use the PHP unset() function but I'd like to know how to do it using Laravel Collection methods

You can use forget by doing little trick, see my answer

Sohel0415
– Sohel0415

2018-01-29 17:46:21 +00:00
Commented Jan 29, 2018 at 17:46 — Sohel0415
– Sohel0415, Commented Jan 29, 2018 at 17:46

Sohel0415 · Accepted Answer · 2018-01-29 17:59:05Z

3

You can use forget() by doing a little trick as forget() only works on collection object.

$collections = $collections->map(function ($c) {
    return collect($c)->forget('tag_name');
});
return $collections;

edited Jan 29, 2018 at 17:59

answered Jan 29, 2018 at 12:21

Sohel0415

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3 Comments

SomethingOn Over a year ago

Though you are answering the question, it was originally asking to use Laravel collection methods rather than unset(). If a Laravel collection is a super set of the PHP array and unset() is what is used to remove a property from a Laravel collection you should specify that.

Sohel0415 Over a year ago

@SomethingOn I was missing the unset part in original question. I have updated my answer and thanks for your suggestion.

JessycaFrederick Over a year ago

This was helpful for me, as except() wasn't working, but this did.

common sense · Accepted Answer · 2018-01-29 14:23:57Z

The except() method does exactly what you need. It removes one or more keys from a collection:

$persona = collect([     
    'name' => 'Persona 5',
    'cover' => 'cover_persona-5_playstation-3.png',
    'bio' => 'This is a syno',
    'all_nb_rank": nul',
    'platform_name' => 'Sony Playstation 3',
    'tag_name' => 'RPG',
    'developper' => 'Deep Silver',
    'publisher' => 'Atlus'
]);

$result = $persona->except(['tag_name']);

$personasWithOutTagName = $personas->except(['tag_name']);

This will result in:

[
    'name' => 'Persona 5',
    'cover' => 'cover_persona-5_playstation-3.png',
    'bio' => 'This is a syno',
    'all_nb_rank": nul',
    'platform_name' => 'Sony Playstation 3',
    'developper' => 'Deep Silver',
    'publisher' => 'Atlus'
];

Doing this for all of your items in the personas collection, you can do this:

$result = $personas->map(function ($person) {
    return collect($person)->except(['tag_name'])->all();
});

The $result will be a collection with all personas except the tag_name key.

user320487 · Accepted Answer · 2018-01-29 12:22:41Z

0

The partition method can be used to separate a collection into one or more collections depending on the logic of your truth test. Use it with the list method as shown in the example here:

https://laravel.com/docs/5.5/collections#method-partition

Another option is the mapToGroups method.

https://laravel.com/docs/5.5/collections#method-maptogroups

answered Jan 29, 2018 at 12:22

user320487

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