Laravel relationship between auto model instance - laravel

Question

i'm work on project that require to make all step auto i mean user can add category with items "Regardless of the nature of the names of these category and items" .
and from back i will create new table for each " category and item " with name like user send and link tables with only two model One for Parent and anther for child item .
Now problem with get relationship between instance of Parent & Child Model
My Code
$parent = new ParentModel('product_categories');
$related = new RelatedModel('products');
My ParentModel Like :
`
public function childrens()
{
return $this->hasMany(RelatedModel::class , 'parent_id' ,'id');
}
`
My RelatedModel Like :
`
public function __construct($table = null ,array $attributes = [])
{
parent::__construct($attributes);
$this->setTable($table);
}
public function parent()
{
return $this->belongsTo(ParentModel::class , 'parent_id' ,'id');
}
`
Now when i pass different table name in instance model its work fine and return all table data
$query = $parent->newQuery()->get()
But problem when i try get data with these relationship dynamically
$query = $parent->newQuery()->with('childrens')->get()
laravel always ignore setTable() function and make query from
table name "related_models" not table i'm inject
this is problem show
SQLSTATE[42S02]: Base table or view not found: 1146 Table 'related_models' doesn't exist
and query like that
select * from 'related_models' where 'related_models'.'parent_id' in (1,2)
can i from these model pass only table name and get all data with relation
or can any one help to make this logic sense
Thanks

Answer 1

The point of an ORM and models is to create a logical entrypoint to get data from te database. Going forth with an implementation like your's sounds like its not easy to follow for any new developer who looks at it, and it will eventually run into limitations.
What you could do if writing all the models is just to much work is creating abstracts:
// parent abstract
abstract class Parent extends Model {
abstract protected function childModel();
public function childrens()
{
return $this->hasMany($this->childModel() , 'parent_id' ,'id');
}
}
// parent implementation
class Product extends Parent {
public function childModel()
{
return ProductCategories::class;
}
}
// child abstract
abstract class Child extends Model {
abstract protected function parentModel();
public function parent()
{
return $this->belongsTo($this->parentModel() , 'parent_id' ,'id');
}
}
// child implementation
class ProductCategories extends Child {
public function parentModel()
{
return Product::class;
}
}