Retrieving relationships of relationships using Eloquent in Laravel

Question

I have a database with the following tables and relationships:

Advert 1-1 Car m-1 Model m-1 Brand

If I want to retriev

Answer 1

Suppose you have 3 models region,city,hotels and to get all hotels with city and region then

Define relationship in them as follows:-

Hotel.php

class Hotel extends Model {

  public function cities(){
        return $this->hasMany(City::class);
  }

  public function city(){
        return $this->belongsTo('App\City','city_id');
  }
}

City.php

class City extends Model {

  public function hotels(){
      return $this->hasMany(Hotel::class);
  }

  public function regions(){
      return $this->belongsTo('App\Region','region_id');    
  }
}

Region.php

class Region extends Model
{

  public function cities(){
      return $this->hasMany('App\City');    
  }

  public function country(){
      return $this->belongsTo('App\Country','country_id');
  } 
}

HotelController.php

public function getAllHotels(){
    // get all hotes with city and region
    $hotels = Hotel::with('city.regions')->get()->toArray();

}