How to create seeding hierarchy in laravel - laravel

Question

I have problem creating a seeding hierarchy in Laravel, is there way i can achieve hierarchy by just creating a seeding data. I have 3 column [Vehicle,Model,Variant] so each vehicle has different model and variant. I will show you the sample table that I created on excel that I wanted to achieve.
Expected Output:
Here is my seeding function:
<?php
use Illuminate\Database\Seeder;
use App\Variant;
use App\Vehicle;
use App\VehicleModel;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;
class CarsSeeder extends Seeder
{
/**
* Run the database seeds.
*
* #return void
*/
public function run()
{
foreach (Vehicle::all() as $vehicle_data) {
foreach (VehicleModel::all() as $vehicle_model_data) {
foreach (Variant::all() as $variants_data) {
DB::table('cars')->insert([
[
'make' => $vehicle_data->name,
'model_id' => $vehicle_model_data->id,
'variant_id' => $variants_data->id,
'created_at'=>date('Y-m-d H:i:s'),
'updated_at'=>date('Y-m-d H:i:s')
]
]);
}
}
}
}
}
Car Model:
class Car extends Model
{
//
protected $table = 'cars';
protected $fillable = [
'id',
'make',
'variant_id',
'model_id'
];
public function variants() {
return $this->hasMany('App\Variant','id','variant_id');
}
public function models() {
return $this->hasMany('App\VehicleModel','id','model_id');
}
}
Variant Model:
class Variant extends Model
{
//
protected $table = 'variants';
protected $fillable = [
'name'
];
}
Vehicle Model:
class Vehicle extends Model
{
//
protected $table = 'vehicles';
protected $fillable = [
'name'
];
}
Vehicle Model:
class VehicleModel extends Model
{
//
protected $table = 'vehicle_models';
protected $fillable = [
'name'
];
}

Answer 1

Assuming the following relations
Vehicle hasMany VehicleModel(s)
VehicleModel hasMany Variant(s)
class Vehicle extends Model
{
public function vehicle_models()
{
return $this->hasMany(VehicleModel::class);
}
}
class VehicleModel extends Model
{
public function variants()
{
return $this->hasMany(Variant::class);
}
}
Try this
public function run()
{
$vehicles = Vehicle::with('vehicle_models.variants')->get();
foreach($vehicles as $vehicle) {
foreach($vehicle->vehicle_models as $model) {
foreach($model->variants as $variant){
Car::create([
'make' => $vehicle->name,
'model_id' => $model->id,
'variant_id' => $variant->id
]);
}
}
}
}