Does not load related model, i am using many to many relationship.

I am getting an error which says Phalcon\Mvc\Model\Manager can not load the model. I used multi module setup.

Having multi module setup.

My Models:

1. Users
2. Groups
3. GroupsMembers

Relationship in Users model:

public function initialize(){

$this->hasManyToMany("id", 
               "GroupsMembers",
               "user_id","group_id",
               "Groups",
               "id",
                array('alias' => 'GroupsMembers')
                );

}

Relationship in Groups model:

public function initialize(){

    $this->hasManyToMany("id", 
                         "GroupsMembers",
                         "group_id","user_id",
                         "Users",
                         "id",
                          array('alias' => 'Users')
                        );

}

Relationship in GroupsMembers model:

public function initialize(){

    $this->belongsTo("group_id", "Groups", "id",  array('alias' => 'Group'));
    $this->belongsTo("user_id", "Users", "id",  array('alias' => 'User'));

}

Controller where I am fetching list of groups which is subscribed by a user.

The top part of my controller where I have included all these 3 models and expected that these would be avilable to use.

namespace Uno\Webservice\Controllers; use Uno\Webservice\Models\Users; use Uno\Webservice\Models\Groups; use Uno\Webservice\Models\GroupsMembers;

class UserController extends ControllerBase {

public function indexAction()
{
    $this->view->disable();
    $user_id = 3;
    $user = Users::findFirstById($user_id);

    $subscribed_groups = $user->groupsMembers;

    foreach($subscribed_groups as $groupMember){
        echo $groupMember->groups->title;
    }
    die;
}

The error I am getting is:

Fatal error: Uncaught exception 'Phalcon\Mvc\Model\Exception' with message 'Model 'Groups' could not be loaded' in /var/www/html/uno/apps/webservice/controllers/UserController.php:245 Stack trace: #0 [internal function]: Phalcon\Mvc\Model\Manager->load('Groups') #1 [internal function]: Phalcon\Mvc\Model\Query->_prepareSelect() #2 [internal function]: Phalcon\Mvc\Model\Query->parse() #3 [internal function]: Phalcon\Mvc\Model\Query->execute() #4 [internal function]: Phalcon\Mvc\Model\Manager->getRelationRecords(Object(Phalcon\Mvc\Model\Relation), NULL, Object(Uno\Webservice\Models\Users), NULL) #5 /var/www/html/uno/apps/webservice/controllers/UserController.php(245): Phalcon\Mvc\Model->__get('groupsMembers') #6 [internal function]: Uno\Webservice\Controllers\UserController->followedGroupsAction() #7 [internal function]: Phalcon\Dispatcher->dispatch() #8 /var/www/html/uno/public/index.php(196): Phalcon\Mvc\Application->handle() #9 /var/www/html/uno/public/index.php(202): Application->main() #10 {main} thrown in /var/www/html/uno/apps/webservice/controllers/UserController.php on line 245

Please let me know if any more information needed to answer that. Any help on that would be apperciable.

Best, Rakesh