| id | parent_id | name |
|---- |----------- |------------- |
| 1 | NULL | Electronics |
| 2 | 1 | Computers |
| 3 | 2 | Accessories |
| 4 | 3 | Keyboards |
public function parent() {
return $this->belongsTo(Category::class, 'parent_id');
}
public function childs() {
return $this->hasMany(Category::class, 'parent_id');
}
public function products() {
return $this->hasManyThrough(Product::class, Category::class, 'parent_id', 'category_id', 'id');
}
| id | category_id | name |
|---- |------------- |----------- |
| 1 | 2 | Product 1 |
| 2 | 3 | Product 2 |
| 3 | 4 | Product 3 |
public function categories() {
return $this->belongsTo(Category::class, 'category_id');
}