Laravel Resource - Parents with Childrens Categories - php

Question

I want to load my childrens categories in the parent with Laravel Resource.
My json is like that :
"data": [
{
"id": 2,
"slug": "child-categorie-0",
"name": "Child Catégorie 0",
"parent_id": 1
},
{
"id": 3,
"slug": "child-categorie-1",
"name": "Child Catégorie 1",
"parent_id": 1
},
{
"id": 1,
"slug": "parent-categorie-0",
"name": "Parent Catégorie 0",
"parent_id": null
},
],
I would like to be like that :
"data": [
{
"id": 1,
"slug": "parent-categorie-0",
"name": "Parent Catégorie 0",
"childrens": [
{
"id": 2,
"slug": "child-categorie-0",
"name": "Child Catégorie 0",
},
{
"id": 3,
"slug": "child-categorie-1",
"name": "Child Catégorie 1",
}
]
}
],
App\Http\Resources\Category.php
public function toArray($request)
{
return [
'id' => $this->id,
'slug' => $this->slug,
'name' => $this->name,
'parent_id' => $this->parent_id
];
}
Controller
$categories = Category::orderBy('name', 'asc')->get();
return new CategoryCollection($categories);
I'm new with Laravel Resource so if someone have a path for solving this problem, thanks !

Answer 1

I solve my problem !
I create a relationship in my Category Model.
public function childrens()
{
return $this->hasMany('App\Category', 'parent_id', 'id');
}
In my Category Resource
public function toArray($request)
{
return [
'slug' => $this->slug,
'name' => $this->name,
'childrens' => self::collection($this->whenLoaded('childrens'))
];
}
In my Controller
$categories = Category::with('childrens')->parents()->orderBy('name','asc')->get();