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POExpress Custom Module Not Loading on Heroku
 

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    <p><em>See Update Below</em></p> <p>I have written a Node.js application with Express that works fine locally, but when I run the app on Heroku, it gives me the following error:</p> <pre><code>2013-01-19T21:55:42+00:00 app[web.1]: module.js:340 2013-01-19T21:55:42+00:00 app[web.1]: throw err; 2013-01-19T21:55:42+00:00 app[web.1]: ^ 2013-01-19T21:55:42+00:00 app[web.1]: Error: Cannot find module './blog/blog' 2013-01-19T21:55:42+00:00 app[web.1]: at Function.Module._load (module.js:312:12) 2013-01-19T21:55:42+00:00 app[web.1]: at Module.require (module.js:362:17) 2013-01-19T21:55:42+00:00 app[web.1]: at Object.Module._extensions..js (module.js:467:10) 2013-01-19T21:55:42+00:00 app[web.1]: at require (module.js:378:17) 2013-01-19T21:55:42+00:00 app[web.1]: at Object.&lt;anonymous&gt; (/app/app.js:15:12) 2013-01-19T21:55:42+00:00 app[web.1]: at Function.Module._resolveFilename (module.js:338:15) 2013-01-19T21:55:42+00:00 app[web.1]: at Module.load (module.js:356:32) 2013-01-19T21:55:42+00:00 app[web.1]: at Module.runMain (module.js:492:10) 2013-01-19T21:55:42+00:00 app[web.1]: at Function.Module._load (module.js:280:25) 2013-01-19T21:55:42+00:00 app[web.1]: at Module._compile (module.js:449:26) 2013-01-19T21:55:43+00:00 heroku[web.1]: Process exited with status 1 2013-01-19T21:55:43+00:00 heroku[web.1]: State changed from starting to crashed </code></pre> <p>I don't understand why it doesn't work on Heroku, because the exact same code works perfectly locally. Maybe it has something to do with how I put the code on Heroku's server? Just in case, below is my filesystem, the code for my <code>app.js</code> file, and my <code>blog.js</code> module that I want <code>app.js</code> to load:</p> <p><strong>filesystem:</strong></p> <p><img src="https://i.stack.imgur.com/Q5RRX.png" alt="filesystem"></p> <p><strong>app.js:</strong></p> <pre><code>//requires and starts up app var express = require('express'); var app = express(); //db setup var mongoose = require('mongoose') , dbURI = 'localhost/brads-projects'; //configures app for production, connects to MongoHQ databse rather than localhost app.configure('production', function () { dbURI = process.env.MONGOHQ_URL; }); //requires the various project files var blog = require('./blog/blog').blog; //tries to connect to database. mongoose.connect(dbURI); //once connection to database is open, then rest of app runs mongoose.connection.on('open', function () { //runs the blog app blog(app, express); app.listen(process.env.PORT || 5000); }); //in the event of a connection to database error, the app will not run mongoose.connection.on('error', console.error.bind(console, 'connection error:')); </code></pre> <p><strong>blog.js:</strong></p> <pre><code>module.exports.blog = function(app, express) { //models var postmodel = require('./models/post').postmodel , usermodel = require('./models/user').usermodel , notificationmodel = require('./models/notification').notificationmodel , commentmodel = require('./models/comment').commentmodel; //controllers var indexHandler = require('./controllers/index').index , newpostHandler = require('./controllers/newpost').newpost , postandidHandler = require('./controllers/postandid').postandid , newPostHandler = require('./controllers/newpost').newpost , searchHandler = require('./controllers/search').postsearch , loginHandler = require('./controllers/login').login , logoutHandler = require('./controllers/login').logout , dashboardHandler = require('./controllers/dashboard').dashboard , registerHandler = require('./controllers/register').register , userSettingsHandler = require('./controllers/usersettings').usersettings , editpostHandler = require('./controllers/editpost').editpost , newCommentHandler = require('./controllers/newcomment').newcomment; //misc requires var MemStore = require('connect/lib/middleware/session/memory'); //configures app for general stuff needed such as bodyParser and static file directory app.configure(function () { app.use(express.bodyParser()); app.use(express.static(__dirname + '/static')); app.use(express.cookieParser('lockirlornie123')); app.use(express.session({store: MemStore( { reapInterval: 60000 * 10 })})); }); //requires a user session for access function requiresLogin(request, response, next) { if (request.session.user) { next(); } else { response.redirect('/blog/login'); } }; //requires user session and admin for access function requiresLoginAndAdmin(request, response, next) { if (request.session.user &amp;&amp; request.session.user.role === 'admin') { next(); } else { if (request.session.user) { response.redirect('/blog'); } else { response.redirect('/blog/login'); } } }; console.log("loaded"); var PostModel = new postmodel(); var Post = PostModel.setupPostSchema(); var UserModel = new usermodel(); var User = UserModel.setupUserSchema(); var NotificationModel = new notificationmodel(); var Notification = NotificationModel.setupNotificationSchema(); NotificationModel.clickNotificationHandler(app, Notification); var CommentModel = new commentmodel(); var Comment = CommentModel.setupCommentSchema(); app.set('views', __dirname + '/views'); app.set('view engine','jade'); /* var newuser = new User({email: "brad.ross.35@gmail.com", password: UserModel.createHashPass("Brad1234"), role: 'admin', activated: true}); newuser.save(function (err) { if (err) { console.log("error saving!"); } else { console.log("successfully created!"); } }); */ //get request for the home page that displays the 10 most recent posts indexHandler(app, Post, PostModel, NotificationModel.getNotifications, Notification); //get request for the unique page for every post postandidHandler(app, Post, NotificationModel.getNotifications, Notification, CommentModel.getComments, Comment); //post request for the submit url that creates a new post and puts it into the database //if a get request is sent to the sumbit page, it redirects users away from the /submit url in order to keep them away and not cause errors. newPostHandler(app, Post, requiresLogin, PostModel, NotificationModel.getNotifications, Notification); //post request to create a new comment newCommentHandler(app, Comment, requiresLogin, CommentModel, NotificationModel.getNotifications, Notification, NotificationModel.createNotification, Post); //get request for search page that both displays search results and allows users to create new search queries searchHandler(app, Post, NotificationModel.getNotifications, Notification); //login page get request and post request loginHandler(app, UserModel.authenticate, User); //logout page that redirects back to home logoutHandler(app); //dashboard page for managing posts by user //and if user is an admin, adding and deleting users dashboardHandler(app, User, Post, requiresLoginAndAdmin, NotificationModel.getNotifications, Notification, Comment); //a page for users to register for posting priveleges registerHandler(app, User, UserModel, NotificationModel.createNotification, Notification); //a page for user settings userSettingsHandler(app, User, UserModel, requiresLogin); //a page to edit posts editpostHandler(app, Post, requiresLogin, NotificationModel.getNotifications, Notification); }; </code></pre> <p><strong>UPDATE:</strong></p> <p>Thanks to the suggestions below, I have run <code>heroku run bash</code> to find out what files are actually there, and when I do the following, I find out some intriguing information, namely that the file I am trying to import <em>isn't actually there</em>:</p> <pre><code>~ $ cd ./blog ~/blog $ ls ~/blog $ cd .. ~ $ cd ./addressbook ~/addressbook $ ls ~/addressbook $ cd .. ~ $ cd ./views ~/views $ ls addressbook blog index ~/views $ cd ./blog ~/views/blog $ ls dashboard.jade index.jade layout.jade newpost.jade register.jade editpost.jade index_error.jade login.jade postandid.jade search.jade </code></pre> <p>Looks like something I am doing is not uploading those files in app/blog and app/addressbook. Interesting and a good piece of info. Thanks for the suggestions...</p>
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    1. COIt seems to me the app is running in a different working directory than you expect on Heroku. What is the value of `process.cwd()`?
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    2. CO@myanimal But so long as `app.js` and `blog.js` are in same directory, it should work fine.
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