Laravel-mongodb: Exception when applying select to return just couple fields through belongsToMany relation

[zainescu]

I have some belongsToMany relations where I want to return just couple fields using select:

public function followedUsers()
{
    return $this->belongsToMany('App\Models\User',null,'followers','followed_users')
                        ->select('_id','slug','profile_name','profile_image');
}

When I query the relation
\App\Models\Users::with('followedUsers)->find($id);

I get an exception ""Invalid argument supplied for foreach()"

If I remove the "select" from the relation it works fine but the models are pretty big so I would send a lot of useless data through the API.

It seems this happens only for belongsToMany, I did not notice this problem for 1 to many relations at least not in 1 the direction

[zainescu]

@jenssegers I tested some more relation and noticed the following:

• for hasMany if I apply the "select" it does not generate exception but it returns an empty array.
• for belongsTo the "select" fields seems to work properly.

[arnabrahman]

Any update on this?