Pass id parameter to resource in Laravel - php

Question

I have the following method in my Laravel controller:
public function specialOffers($id) {
return \App\Http\Resources\SpecialOfferResource::collection(Offers::all());
}
I need some special manipulations, so I've created this SpecialOfferResource resource. The resource code is:
class SpecialOfferResource extends Resource {
/**
* Transform the resource into an array.
*
* #param \Illuminate\Http\Request $request
* #return array
*/
public function toArray($request) {
//here I need the $id passed to the controller's method,
//but I only have $request
return [
//my request fields, everything ok
];
}
}
How can I pass $id from the controller's method to this resource? I know I can pass through the request as a field, but is it possible this other way?

Answer 1

The resource collection is just a wrapper that formats, or maps, the collection you pass to it.
The collection you are passing is Offers::all(), which would include all Offers models.
You'd likely want to use the query builder to narrow down the collection you are passing:
public function specialOffers($id) {
$results = Offers::where('column', $id)->get();
return \App\Http\Resources\SpecialOfferResource::collection($results);
}

Answer 2

I'm not sure whether this is acceptable or not, but in some case i do need some parameter passed from controller to use inside toArray resource method and this is what i did.
Create resource class that extend Illuminate\Http\Resources\Json\ResourceCollection.
<?php
namespace App\Http\Resources;
use Illuminate\Http\Resources\Json\ResourceCollection;
class TestResource extends ResourceCollection
{
private $id;
public function __construct($id, $collection)
{
parent::__construct($collection);
$this->id = $id;
}
public function toArray($request)
{
return [
'data' => $this->collection,
'id' => $this->id
];
}
}
And from controller you can call like this:
<?php
namespace App\Http\Controllers;
use App\Http\Resources\TestResource;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\ResourceCollection;
class TestController extends Controller
{
public function index()
{
$id = 30;
$collection = collect([['name' => 'Norli'], ['name' => 'Hazmey']]);
return new TestResource($id, $collection);
}
}