How to prepend Laravel Eloquent Collection array with a key-value pair?
Solution 1
$foo = ['' => 'Choose something…'] + $foo->all();
If your $foo
must be a collection instance, simply wrap it in a collection again:
$foo = collect(['' => 'Choose something…'] + $foo->all());
I submitted a PR to laravel to allow you to pass a key to prepend
. If you're using Laravel 5.1.24 or newer, you can now do this:
$foo = $this->fooRepository->all()
->lists('name', 'id')
->prepend('Choose something…', '');
Later versions of Laravel have renamed the lists
method to pluck
. If you're using relatively modern version of Laravel, use pluck
instead:
$foo = $this->fooRepository->all()
->pluck('name', 'id')
->prepend('Choose something…', '');
Solution 2
Try using ->prepend()
http://laravel.com/api/5.1/Illuminate/Database/Eloquent/Collection.html#method_prepend
$foo->prepend('Choose Something')
This won't give the correct result. The index would be 0
instead of an empty string. Instead you could try something like this
$foo = $foo->reverse()->put('Choose Something')->reverse()
But using @Joseph Silber answer is probably better.
Matt Komarnicki
Hi there! I'm Matt - Software Architect who crafts highly scalable, multi-tenant, SaaS and cloud-based applications. I am an easy-going guy who loves to work with creative individuals on challenging projects using suitable technologies. I like to share my knowledge with others, mentor, inspire and collaborate with my work mates. While I prefer to stick within realm of backend code, I do enjoy working on a visual layer of each project as well. I consider myself a person with decent graphic taste in terms of UX/UI and styling things in general. Find out more at mattkomarnicki.com.
Updated on June 17, 2022Comments
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Matt Komarnicki almost 2 years
I'm fetching something from database:
$foo = $this->fooRepository->all()->lists('name', 'id');
I get:
Collection {#506 ▼ #items: array:9 [▼ "9c436867-afe9-4234-a849-253aea4f602c" => "aaa" "d250102b-1370-40d0-99c5-7e5bfd0a15e4" => "sss" "7342f212-083b-458d-8af8-24986bbb627d" => "ddd" "029c53ce-dc16-49fd-8d83-9d8270d9ff37" => "fff" "3add6a37-72e2-4054-853e-9ed8addbf3ea" => "ggg" "28f5a9ac-014e-4f22-bda8-e2d5b1f48273" => "hhh" "94fccb2c-d732-4369-9bf7-78925797e578" => "jjj" "5b494994-93f0-406e-b420-aceb7b6111d7" => "kkk" "22a7824a-c6eb-45e7-b9c5-e40c134e3ac8" => "lll" ] }
Perfect. This collection is later passed into
Form::select
to populate select / option dropdown.I would like to prepend this collection with another key-value pair where key will be empty string and value will contain text like "Choose something".
I can append:
$foo[''] = 'Choose something…';
so I get
Collection {#506 ▼ #items: array:10 [▼ "9c436867-afe9-4234-a849-253aea4f602c" => "aaa" "d250102b-1370-40d0-99c5-7e5bfd0a15e4" => "sss" "7342f212-083b-458d-8af8-24986bbb627d" => "ddd" "029c53ce-dc16-49fd-8d83-9d8270d9ff37" => "fff" "3add6a37-72e2-4054-853e-9ed8addbf3ea" => "ggg" "28f5a9ac-014e-4f22-bda8-e2d5b1f48273" => "hhh" "94fccb2c-d732-4369-9bf7-78925797e578" => "jjj" "5b494994-93f0-406e-b420-aceb7b6111d7" => "kkk" "22a7824a-c6eb-45e7-b9c5-e40c134e3ac8" => "lll" "" => "Choose something…" ] }
but no idea how I can move it as the first element of the collection. I simply cannot use
array_merge
because I'm dealing with instance ofIlluminate\Database\Eloquent\Collection
rather than array so this answer won't work.Any hints? Thanks.
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Joseph Silber over 8 yearsThis will set the key to
0
. The OP wants the key to be an empty string. -
EspadaV8 over 8 yearsYep, you're absolutely correct. Could do something like
$foo->reverse()->put(‘Choose Something’)->reverse()
instead -
Matt Komarnicki over 8 yearsThanks Joseph. This was very helpful. Only thing I had to change was to use
Illuminate\Support\Collection
. -
Joseph Silber over 8 years@slick - what do you mean? Where, what and why did you have to change?
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Matt Komarnicki over 8 yearslater, inside the place that was expecting that
$foo
collection. :) All good. Don't worry! -
Matt Komarnicki over 6 yearsNow it's worth mentioning that
lists
has been deprecated andpluck
should be used instead. -
Solivan over 5 yearsthanks, Is there any better way like "array_unshift()" in arrays?
-
Rox over 4 years
->prepend('Choose something…', '');
worked amazingly!