Laravel Recursive query with eloquent - laravel

Question

I have the following table in mysql:
Schema::create('tb__menu', function (Blueprint $table) {
$table->increments('id');
$table->unsignedInteger('idmenu')->nullable();
$table->string('name', 250);
$table->foreign('idmenu')->references('id')->on('tb__menu');
$table->engine = "InnoDB";
});
Here some records:
id | idmenu | name
1 NULL root
2 1 folder 1
3 1 folder 2
4 2 folter 1 A
5 2 folder 1 B
6 2 folder 1 C
7 3 folder 2 A
8 4 folder 1 A A
This is the model of the table:
class Menu extends Model
{
protected $table = 'tb__menu';
protected $fillable = [
'id',
'idmenu',
'name',
];
protected $casts = [
'id' => 'integer',
'idmenu' => 'integer',
'name' => 'string'
];
public function menu() {
return $this->belongsTo(Menu::class, 'idmenu');
}
public function menus() {
return $this->hasMany(Menu::class, 'idmenu');
}
}
And this is the controller:
class MenuTC extends Controller
{
public function index()
{
return /* NEED */
}
}
How can I get a json structure of the menu table records?, for example:
[
{
"id": 1,
"name": "root",
"childrens": [
{
"id": 2,
"name": "folder 1",
"childrens": [
{
"id": 4,
"name": "folder 1 A",
"childrens": [
{
"id": 8,
"name": "folder 1 A A"
}
]
},
{
"id": 5,
"name": "folder 1 B"
},
{
"id": 6,
"name": "folder 1 C"
}
]
},
{
"id": 3,
"name": "folder 2",
"childrens": [
{
"id": 7,
"name": "folder 2 A"
}
]
}
]
}
]
I would appreciate any help you can give me.
PD: In SQL server, I could do this with a recursive query, but in Laravel I have no idea how to do it.

Answer 1

create a recursive relationship like below
public function childMenu(){
return $this->hasMany(Menu::class,'idmenu','id');
}
public function recursiveChildMenu(){
return $this->childMenu()->with('recursiveChildMenu');
}
then in controller
Menu::with('recursiveChildMenu')->get();