This is a simple Node.JS template that uses Express and has mongodb set up. It is all wired to go in OpenShift. I would not recommend using this for a more complicated application, as there should be more seperation into different files for different logic.
Assuming you already have an OpenShift account
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Create a Node.JS application and add a mongo cartridge
rhc app create nodejs-0.10 mongodb-2 --from-code=https://github.com/openshift-quickstart/simple_node_express_mongo
By default flag --from-code will add this repository as an upstream, which can be use later to pull updates.
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cd into the directory that matches your application name
cd
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Modify the code and push back up to your OpenShift application
git push
This application lists all entries in names table, by default it's empty, so entering your application should give you following output
[]
For the application to show some data, connect to your application using ssh
rhc ssh
Then run following commands
mongo # runs mongo CLI
show dbs # shows all dbs
use <your app name> # or check output from previous command for it's name
db.names.find() # gives you names' entries, should be empty
db.names.insert({name: 'a', surname: 'b'}) # inserts object into names
db.names.find() # should return previously inserted object
Now running the application in the browser should also return inserted object.
The MongoDB code you want to modify can be found in this line
self.db.collection('names').find().toArray(function(err, names) {}
If you chose to use a different database other than the one named the same as your application you need to change the Auth section as well.
OpenShift has authentication turned on for the database, therefore any connection has to authenticate. By default a connection from the MongoDB driver will try to authenticate against users in the DB you specify.
Please change the Auth line to look like the following so that the authentication uses the OpenShift provided credentials.
self.db.authenticate(self.dbUser, self.dbPass, {authdb: "admin"}, function(err, res){...
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