CODE EXAMPLE FOR PHP

laravel One to Many relationship using custom primary keys

public function company()
{
    return $this->belongsTo('AppModelsCompany', 'company_id', 'user_id');
}


public function company()
{
    return $this->belongsTo('AppModelsCompany', 'company_id', 'id'); //or return $this->belongsTo('AppModelsCompany', 'company_id');
}

return $this->belongsTo(ParentModel::class, 'foreign_key', 'owner_key');