Laravel collection get columns to array

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I have collection:

$categories = $post->categories;

I get this:

#items: array:1 [▼
   0 => Category {#999 ▶}
   1 => Category {#999 ▶}
]

I need get from category id.

I try this:

$categories = array_column('id', $post->categories);

But with collections array_column not working. How I can do this?

If you want to get any property from a collection, use map higher order message.

example.

$category_ids = $post->categories->map->id;

that's it.

Laravel collection get columns to array, If you want to get any property from a collection, use map higher order message. example. $category_ids = $post->categories->map->id;. Since collect() is part of the Enumerable contract, you can safely use it to get a Collection instance. concat() The concat method appends the given array or collection values onto the end of the collection:

First convert your collection to array. You can use toArray() of eloquent as below.

$categories = $post->categories()->get()->toArray();

And this

$categories = array_column('id', $post->categories);

Should be

$categories = array_column($post->categories, 'id');

Your new code should look like:

$categories = $post->categories()->get()->toArray();

$categories = array_column($categories, 'id');

Ref: array_column

Eloquent Collection, get only certain fields, Eloquent Collection, get only certain fields would be for creating an array to use in form selects e.g. giving me an array of $id => $description. How To Store Array Value In Database Using Laravel

There are already some good answers.

An alternative is:

$category_ids = $post->categories->pluck('id');

Collections - Laravel, All collections also serve as iterators, allowing you to loop over them as if they were simple PHP arrays: $users = App\User::where('active', 1)->get(); foreach  This tutorial will give you guide of laravel collection group by relationship, array, date and row example. Here you will know laravel collection groupby two columns. you will understand step by step laravel collection group by with relationship, sum, date and array. you can show laravel collection group by with total count with alias.

Eloquent: Collections - Laravel, Those icons represent those columns. What I want, is to know if Eloquent provides some way to return an array where I can specify the key. In this  You can do it like this since Laravel 5.5: Post::with('user:id,username')->get(); Care for the id field and foreign keys as stated in the docs:. When using this feature, you should always include the id column and any relevant foreign key columns in the list of columns you wish to retrieve.

Tell Eloquent to return an array using a column value as key, If for some reason, you need to get the array of eloquent model's table column names, here's one way to do it: You can either make your query dynamic with passing an array of columns to return or you can do another ->get (['id', 'email', 'name']) which won't requery the database but it will return a new collection with only the selected values.

Get table column names as array from Eloquent model, array_column — Return the values from a single column in the input array This value may be an integer key of the column you wish to retrieve, or it may be a  I want to sort multiple columns in Laravel 4 by using the method orderBy() in Laravel Eloquent. The query will be generated using Eloquent like this: SELECT * FROM mytable ORDER BY coloumn1 DESC,

Comments
  • how about $categories = array_column($post->categories,'id');? you just misplaced the arguments