Where put eloquent relationship with Repository Pattern in Laravel - php

Question

I'm trying to learn and implement the Repository Pattern in my app built with Laravel 5.6.
I have implemented my Controller:
class CompaniesController extends Controller
{
protected $company;
public function __construct(ICompanyRepository $company) {
$this->company = $company;
}
public function index(){
$companies = $this->company->getAllCompanies();
return view('companies::index')->with("companies", $companies);
}
}
Then I have implemented the repository interface:
interface ICompanyRepository
{
public function getAllCompanies();
public function findBy($att, $columns);
public function getById($id);
public function with($relations);
}
I have implemented My Repository:
class CompaniesRepository implements ICompanyRepository
{
protected $model;
public function __construct(Companies $model){
$this->model = $model;
}
public function getAllCompanies(){
return $this->model->all();
}
public function findBy($att, $columns)
{
return $this->model->where($att, $columns);
}
public function getById($id)
{
return $this->model->findOrFail($id);
}
public function with($relations)
{
return $this->model->with($relations);
}
}
And then I have created the model:
class Companies extends Model
{
protected $fillable = [];
protected $casts = [
'settings' => 'array'
];
//my question is here!
public function members(){
return $this->hasMany('Companies\Entities\CompaniesMembers');
}
}
For now I have put the relations (in this case members function) in the model, but with this way, If I had to change my ORM, I should change both repository and model, because for now I use Eloquent, but I don't know if in future I will use Doctrine or others.
So my question is:
Where is the best place the relationships and the functions for db?
Is right put all in the Model or It would be better put all in Repository?

Answer 1

So in the EloquentRepo you make a function that combines company with companymembers by a foreach and use modelToObject($model) Something like this. I hope this will help you the good direction.
EloquentRepo:
private function modelToObject($model)
{
if (is_null($model)) {
$entity = null;
} else {
$entity = new Product(
$model->{Model::COL_ID},
$model->{Model::COL_NAME}
);
}
return $entity;
}
Entity:
class Product{
private $id;
private $name;
public function __construct(int $id, string $name) {
$this->setId($id)
->setName($name);
}
public function setName(string $name): Product{
$this->name = $name;
return $this;
}
public function getName(): string {
return $this->name;
}
}