Laravel 5 - Find Fields on "MorphOne" Relationship - php

Question

I'm quite new to Laravel and I'm now facing this issue while trying to create a query:
I have the following Morphable classes:
\App\User
class User {
public function userable()
{
return $this->morphTo();
}
}
\App\Distributor
class Distributor {
public function user()
{
return $this->morphOne('App\User', 'userable');
}
}
user table has the fields: name, email, status, userable_type and userable_id.
distributor table has the fields: store_code and location_id.
By using Eloquent, i need to start the query from Distributor model and select only the following fields: 'name, email, store_code'.
I'm trying the following, but laravel says user.name doesn't exists :(
$queryBuilder = \App\Distributor::has('user');
$queryBuilder->select(['user.name']);
$queryBuilder->get();
QueryException in Connection.php line 651:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'user.name' in 'field list' (SQL: select user.name from distributor where (select count(*) from user where user.userable_id = distributor.id and user.userable_type = App\Distributor and user.deleted_at is null) >= 1)
I was able to achieve my goal forcing the join relationship, but this seems wrong, I think Eloquent is able to find the relation by itself as the Morph relationship is specified in the Model.
Just for record, this works good:
$queryBuilder = \App\Distributor::has('user');
$queryBuilder->join('user', function($join) {
$join->on('userable_id', '=', 'distributor.id')
->where('userable_type', '=', \App\Distributor::class);
});
$queryBuilder->select(['user.name']);
$queryBuilder->get();
Also, since its a one-to-one like relationship, sometimes I'll need to order the results using one of the users columns
But I need another way to do it without forcing the join, something clean as the first example.

Answer 1

read about with() function in the docs
$queryBuilder->select('id','store_code');
$queryBuilder = \App\Distributor::with(['user'=>function($query){
$query->select('id','name','email')
}]);
$queryBuilder->has('user');
$queryBuilder->get();