How to generate an array for a dropdown (with ['key' => 'value']) suitable for a dropdown, from a Laravel collection of Eloquent objects?

Laravel: How to generate an array for a dropdown (with ['key' => 'value']) suitable for a dropdown, from a Laravel collection of Eloquent objects?

The answer used to be list(), but now the answer is pluck()

  1. $posts = Post::all();
  2.  
  3.         echo Form::select("post_id", $posts->pluck("title","id"));
  4.  
  5.         // $posts->pluck("title","id") will produce something like this:
  6.         // [
  7.         //   1 => "post title 1",
  8.         //   5 => "Another post",
  9.         // ...
  10.         // ]

The first param is the actual value you want to 'pluck', and the second value is how you want it keyed. For most cases the second param will be 'id'.

You can also use pluck with just 1 param like this:

  1. $collection = collect([
  2.     ['product_id' => 'prod-100', 'name' => 'Desk'],
  3.     ['product_id' => 'prod-200', 'name' => 'Chair'],
  4. ]);
  5.  
  6. $plucked = $collection->pluck('name');
  7.  
  8. $plucked->all();
  9.  
  10. // ['Desk', 'Chair']

But if more than one item with the same key exists, the last matching one will be used. For example:

  1. $collection = collect([
  2.     ['brand' => 'Tesla',  'color' => 'red'],
  3.     ['brand' => 'Pagani', 'color' => 'white'],
  4.     ['brand' => 'Tesla',  'color' => 'black'],
  5.     ['brand' => 'Pagani', 'color' => 'orange'],
  6. ]);
  7.  
  8. $plucked = $collection->pluck('color', 'brand');
  9.  
  10. $plucked->all();
  11.  
  12. // ['Tesla' => 'black', 'Pagani' => 'orange']

For more details see here.

webdevetc profile pic
webdevetc

I am a 29 year old backend web developer from London, mostly focusing on PHP and Laravel lately. This (webdevetc.com) is my blog where I write about some web development topics (PHP, Laravel, Javascript, and some server stuff). contact me here.



More...


Comments and discussion about How to generate an array for a dropdown (with ['key' => 'value']) suitable for a dropdown, from a Laravel collection of Eloquent objects?

Found this interesting? Maybe you want to read some more in this series?

Or see other topics in the Laravel language

Or see other languages/frameworks:
PHP Laravel Composer Apache CentOS and Linux Stuff WordPress General Webdev and Programming Stuff JavaScript
Or see random questions

How to select all rows for a certain month (or day, year or time), using Eloquent

When is __destruct called in PHP?

What are the SPL data structures

How to sort an array of dates and times?

How can you check if a variable is alphanum (alphanumeric, letters and numbers only) in PHP?

How do Invokable Controllers work in Laravel?

How to set custom HTTP headers in Apache (by editing .htaccess)

How to find out which php.ini file PHP is using?

How to find the intersection (same values) from two arrays?

How to query mysql using PDO in PHP?