Ich habe den folgenden NodeJS-Code als Express-Middleware-Funktion

Middleware.is_authenticated = function(req, res, next)
{
    if(req.system_session == undefined || req.system_session.login_status == false) return res.status(401).send({errors: true, error: 'invalid_session', session: req.system_session}).end();

    Session.validate_session(req.system_session, req.ip, req.headers['user-agent'])

    .then(function(session)
    {
        return next();
    })

    .catch(function(err)
    {
        req.system_session.destroy();
        return res.status(401).send({errors: true, error: err.message, session: req.system_session}).end();
    });
};

Mein Session.validate_session-Code:

Session.validate_session = function(user, user_ip, user_agent)
{
    return new Promise(function(resolve, reject)
    {
        if(user.user_id == null || user.user_name == null || user.user_rank == null || user.user_session == null || user_ip == null || user_agent == null) return reject(new Error('invalid_session'));

        new api_session({user_session: user.user_session}).fetch({columns: ['user_id', 'user_name', 'user_rank', 'user_session', 'user_ip', 'user_agent']})

        .then(function(result)
        {
            if(result == null) return reject(new Error('invalid_session'));

            return result.toJSON();
        })

        .then(function(session)
        {
            if(session == null || session.user_id != user.user_id || session.user_name != user.user_name || session.user_rank != user.user_rank || session.user_ip != user_ip || session.user_agent != user_agent) return reject(new Error('invalid_session'));

            return resolve(session);
        })

        .catch(function(err)
        {
            return reject(err);
        });
    });
};

Alles funktioniert genau so, wie es sollte, alles funktioniert einwandfrei mit der Datenbank, es wird die nächste Route aufgelöst und sogar die Antwort angezeigt. Aber egal was ich versuche, ich bekomme immer wieder "ein Versprechen wurde in einem Handler erstellt, aber nicht von ihm zurückgegeben"

Warning: a promise was created in a handler at middleware.js:12:11 but was not returned from it

at new Promise (/Users/Bill/Documents/app/node_modules/bluebird/js/release/promise.js:77:14)
at Object.Permission.permission_list (/Users/Bill/Documents/app/app/security/permission.js:8:10)
at PermissionService.permission_list (/Users/Bill/Documents/app/app/http/services/permission_service.js:6:14)
at Layer.handle [as handle_request] (/Users/Bill/Documents/app/node_modules/express/lib/router/layer.js:95:5)
at next (/Users/Bill/Documents/app/node_modules/express/lib/router/route.js:131:13)
at /Users/Bill/Documents/app/app/http/middleware.js:12:11
at processImmediate [as _immediateCallback] (timers.js:383:17)

From previous event:
at Middleware.is_authenticated (/Users/Bill/Documents/app/app/http/middleware.js:10:4)
at Layer.handle [as handle_request] (/Users/Bill/Documents/app/node_modules/express/lib/router/layer.js:95:5)
at next (/Users/Bill/Documents/app/node_modules/express/lib/router/route.js:131:13)
at Route.dispatch (/Users/Bill/Documents/app/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/Users/Bill/Documents/app/node_modules/express/lib/router/layer.js:95:5)
at /Users/Bill/Documents/app/node_modules/express/lib/router/index.js:277:22
at Function.process_params (/Users/Bill/Documents/app/node_modules/express/lib/router/index.js:330:12)
at next (/Users/Bill/Documents/app/node_modules/express/lib/router/index.js:271:10)
at clientSession (/Users/Bill/Documents/app/node_modules/client-sessions/lib/client-sessions.js:630:5)
at Layer.handle [as handle_request] (/Users/Bill/Documents/app/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/Users/Bill/Documents/app/node_modules/express/lib/router/index.js:312:13)
at /Users/Bill/Documents/app/node_modules/express/lib/router/index.js:280:7
at Function.process_params (/Users/Bill/Documents/app/node_modules/express/lib/router/index.js:330:12)
at next (/Users/Bill/Documents/app/node_modules/express/lib/router/index.js:271:10)
at SendStream.error (/Users/Bill/Documents/app/node_modules/express/node_modules/serve-static/index.js:121:7)
at emitOne (events.js:77:13)
at SendStream.emit (events.js:169:7)
at SendStream.error (/Users/Bill/Documents/app/node_modules/express/node_modules/send/index.js:275:17)
at SendStream.onStatError (/Users/Bill/Documents/app/node_modules/express/node_modules/send/index.js:392:12)

Wenn jemand irgendwelche Lösungen hat, wäre das großartig. Ich habe viele Versprechungen in meinem Projekt, die sich alle extrem ähneln und alle großartig funktionieren, aber ich kann mich einfach nicht um diese kümmern.