I have my first node server app running fine on localhost, but in a digitalocean (ubuntu) environment I can't get the paths to work.
This line
require("./lib/dbHelper").initilize();
Generate this error
Error: Cannot find module './lib/dbHelper'
at Function.Module._resolveFilename (module.js:339:15)
at Function.Module._load (module.js:290:25)
at Module.require (module.js:367:17)
at require (internal/module.js:16:19)
at Object.<anonymous> (/var/www/wsApp/app.js:18:1)
at Module._compile (module.js:413:34)
at Object.Module._extensions..js (module.js:422:10)
at Module.load (module.js:357:32)
at Function.Module._load (module.js:314:12)
at Function.Module.runMain (module.js:447:10)
And this line
let User = require("../models/User");
generates this error
Error: Cannot find module '../models/User'
at Function.Module._resolveFilename (module.js:339:15)
at Function.Module._load (module.js:290:25)
at Module.require (module.js:367:17)
at require (internal/module.js:16:19)
at Object.<anonymous> (/var/www/wsApp/routes/auth.js:5:12)
at Module._compile (module.js:413:34)
at Object.Module._extensions..js (module.js:422:10)
at Module.load (module.js:357:32)
at Function.Module._load (module.js:314:12)
at Module.require (module.js:367:17)
I have looked here (https://gist.github.com/branneman/8048520) for solutions and I have tried suggestions 3, 4.2 and 6 but nothing changes the error messages.
Worth noting is that this line seems to work fine
app.use("/", require("./routes/auth.js"));
Being new to node I don't quite understand the path mappings, and it seems strange that this last one would work while the first one doesn't since they both use the dot syntax...
If you are developing on a case-insensitive filesystem (OS X or Windows), you may be getting tripped up by the fact that the linux filesystem is case sensitive. Check, for example, that the "H" in "dbHelper" is really uppercase in your git repository.
Related
I am trying to build my nodejs application. but i am always getting this error.
util.js:988
throw new TypeError('The super constructor to "inherits" must not ' +
^
TypeError: The super constructor to "inherits" must not be null or undefined
at Object.inherits (util.js:988:11)
at Object.<anonymous> (D:\CIDE-Backend\CIDE-BACKEND\node_modules\zetta\node_modules\spdy\lib\spdy\connection.js:86:6)
at Module._compile (module.js:573:30)
at Object.Module._extensions..js (module.js:584:10)
at Module.load (module.js:507:32)
at tryModuleLoad (module.js:470:12)
at Function.Module._load (module.js:462:3)
at Module.require (module.js:517:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (D:\CIDE-Backend\CIDE-BACKEND\node_modules\zetta\node_modules\spdy\lib\spdy.js:20:19)
at Module._compile (module.js:573:30)
at Object.Module._extensions..js (module.js:584:10)
at Module.load (module.js:507:32)
at tryModuleLoad (module.js:470:12)
at Function.Module._load (module.js:462:3)
at Module.require (module.js:517:17)
[nodemon] app crashed - waiting for file changes before starting...
i followed this solution but still i am getting same error.
my node version is 8.4.0
my npm version is 5.5.1
Can you tell me how can i solve this error.?
Your dependency zetta is including an ancient version of spdy which is not compatible with you current version of Node. There is currently an open issue on zetta's github about this, which has a work around:
process.EventEmitter = require('events').EventEmitter
const zetta = require('zetta')
Your mileage may vary on that hack, I have not tested it myself. Alternatively, you could wait for the zetta team to fix their dependency or downgrade your node installation.
With the package.json, it's possible to do something like this
"dependencies": {
"WindowManager": "./lib/WindowManager"
},
But when trying to do this in Electron, it gives me this error:
App threw an error during load
Error: Cannot find module 'WindowManager'
at Module._resolveFilename (module.js:470:15)
at Function.Module._resolveFilename (.../desktop/node_modules/electron/dist/Electron.app/Contents/Resources/electron.asar/common/reset-search-paths.js:35:12)
at Function.Module._load (module.js:418:25)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (.../desktop/lib/init.js:15:35)
at Object.<anonymous> (.../desktop/lib/init.js:22:3)
at Module._compile (module.js:571:32)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
Is it because of Electron, or am I doing something wrong?
./lib/WindowManager is a folder with a package.json in it with a main pointing to the WindowManager.js, so that should work.
The case you try to do normally works, make sure that the dependency "WindowManager" has been properly copied by the build tools to either:
.../desktop/node_modules/electron/dist/Electron.app/Contents/Resources/app.asar/node_modules
or
.../desktop/node_modules/electron/dist/Electron.app/Contents/Resources/node_modules
If WindowManager does not exist in the disted node_modules there is something wrong with your build process, hard to be more precise than that.
I followed realm.io tutorial(https://realm.io/docs/javascript/latest/#getting-started), and, in OSX, it works good.
When executing the same program from Windows 7, I receive the following error:
D:\offline-ticketing-workspace\realm-base-test>node app
module.js:602
return process.dlopen(module, path._makeLong(filename));
^
Error: The specified procedure could not be found.
\\?\D:\offline-ticketing-workspace\realm-base-test\node_modules\realm\compiled\node-v57_win32_x64\realm.node
at Object.Module._extensions..node (module.js:602:18)
at Module.load (module.js:507:32)
at tryModuleLoad (module.js:470:12)
at Function.Module._load (module.js:462:3)
at Module.require (module.js:517:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (D:\offline-ticketing-workspace\realm-base-test\node_modules\realm\lib\index.js:94:28)
at Module._compile (module.js:573:30)
at Object.Module._extensions..js (module.js:584:10)
at Module.load (module.js:507:32)
Environment
windows 7
nodejs 8.4.0
realm 1.10.3
Any ideas to what the issue might be?
Currently, Realm requires Windows 8.1 or later.
This works on windows 7 localhost:
var User = mongoose.model(userDBName, userSchema);
But it gives this error for Debian VPS:
/home/node_modules/mongoose/lib/utils.js:28
return pluralize(name.toLowerCase());
^
TypeError: Cannot call method 'toLowerCase' of undefined
at exports.toCollectionName (/home/node_modules/mongoose/lib/utils.js:28:25)
at Mongoose.model (/home/node_modules/mongoose/lib/index.js:361:46)
at Object.<anonymous> (/home/XXX/nodejs/js/dbbase.js:54:21)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (/home/XXX/nodejs/js/db_read.js:1:76)
How to fix it?
The error was the name is really undefined, due to userDBName is undefined. It relative with 'nconf' and config.json. Just incorrect way to this file.
module.js:340
throw err;
^
Error: Cannot find module './models/todo'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (C:\Users\Basel\Desktop\Todo List\routes\api.js:1:74)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
C:\Users\Basel\Desktop\Todo List>
Why this application won't start up? I've already tried a global npm install.
In ./models/todo, the period indicates that node will look in the same folder that api.js is in, which would look for \Todo List\routes\models\todo.js. This does not start from the root of the application. To require this, you'll need to us two periods to jump up a level, and specify the app path as well:
var todo = require('../app/models/todo');
maybe you did not set the system value : NODE_PATH; it should point to your global module location;
in Linux: export NODE_PATH=/usr/local/lib/node_modules/ works good for me;
in my case, the file name i had given in my require statement was wrong. I had my models file named posts.js and i was using require('./models/post'). It worked after i changed it to require ('.models/posts')