Thank You troydavisson. I'm just catching myself all the time that laravel is simple - and I just forget about simpliest solusions.

Thank You. :)

I'm glad it worked.

To elaborate a bit (and for anyone else that might stumble on this), if you look at your Posts model, there's no way for Eloquent to know what the Authors relationship is without it executing all of your methods (which would be unnecessary and potentially dangerous) since 'Authors' is just given as a string until that method executes and the relationship is resolved and built. So instead, you have to do the eager loading pointing to the code that tells Eloquent which relationship to load.

Troy Davisson, Thank you!.

I am getting this exception BadMethodCallException with message Call to undefine method Illuminate\Database\Query\Builder::assign() My user Class: class User extends Model implements AuthenticatableContract, AuthorizableContract,CanResetPasswordContract { use Authenticatable, Authorizable,CanResetPassword;

   protected $hidden = ['password', 'remember_token'];

public function roles(){

     return $this->belongsToMany(Role::class);
}

public function hasRole($role){

    if (is_string($role)) {
        return $this->roles->contains('name',$role);
    }
    return !!$role->intersect($this->roles)->count();
}
public function assign($role){
    if (is_string($role)) {
        
       return  $this->roles()->save(

            Role::whereName($role)->firstOrFail();
            );
    }
    return $this->roles()->save($role);
}

} My Role Class class Role extends Model { public function permissions(){

	return $this->belongsToMany(Permission::class);
}

public function assign(Permission $permission){

	return $this->permissions()->save($permission);
}

}