I'm trying to connect to my mongodb using nodejs and socket.io. I am able to connect to the database because I get 'connection accepted' in my console but on the nodejs side, as soon as I - indeed - get
Connection to mongodb://localhost:27017 established through mongoose
it immediately fails next with
process.nextTick(function() { throw err; }) ^TypeError: undefined is not a function at showCollections**
And here goes showCollections:
var showCollections = function(db, callback) {
mongoose.connection.db.collectionNames(function(error, names) {
if (error) {
throw new Error(error);
} else {
console.log("=>Listening mongo collections:");
names.map(function(cname) {
mongoose.connection.db.dropCollection(cname.name);
console.log("--»"+cname.name);
});
}
});
}
And here is the content of my database folder:
_tmp (empty folder)
local.0
local.ns
mongod.lock
I run the mongodb by typing mongod --dbpath folder and it successfully 'awaits connections on port 27017'.
Also, my node_modules from package.json (npm)
"dependencies": {
"express": "^4.9.6",
"socket.io": "latest",
"mongodb": "~2.0",
"mongoose": "*"
}
Thank you very much for your help...
StackTrace:
> TypeError: undefined is not a function
> at showCollections (/usr/share/nginx/www/index.js:77:25)
> at NativeConnection.callback (/usr/share/nginx/www/index.js:46:3)
> at NativeConnection.g (events.js:199:16)
> at NativeConnection.emit (events.js:104:17)
> at open (/usr/share/nginx/www/node_modules/mongoose/lib/connection.js:485:10)
> at NativeConnection.Connection.onOpen (/usr/share/nginx/www/node_modules/mongoose/lib/connection.js:494:5)
> at /usr/share/nginx/www/node_modules/mongoose/lib/connection.js:453:10
> at /usr/share/nginx/www/node_modules/mongoose/lib/drivers/node-mongodb-native/connection.js:59:5
> at /usr/share/nginx/www/node_modules/mongoose/node_modules/mongodb/lib/db.js:200:5
> at connectHandler (/usr/share/nginx/www/node_modules/mongoose/node_modules/mongodb/lib/server.js:272:7)
EDIT:
I'm as well having these problems when trying to run the nodejs instance:
{ [Error: Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND' }
js-bson: Failed to load c++ bson extension, using pure JS version
I tried fixing them as other questions here would tell but nothing worked either...
From the provided information, it looks like you are using mongodb 2.0 driver. The db.collectionNames method was dropped. Check out the "Db Object" section of this page - https://github.com/mongodb/node-mongodb-native/blob/0642f18fd85037522acf2e7560148a8bc5429a8a/docs/content/tutorials/changes-from-1.0.md#L38
They've replaced it with listCollections. You should get the same effect with:
mongoose.connection.db.listCollections().toArray(function(err, names) {
if (err) {
console.log(err);
}
else {
names.forEach(function(e,i,a) {
mongoose.connection.db.dropCollection(e.name);
console.log("--->>", e.name);
});
}
});
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