Ruby

Connect a Ruby application to TeselaDB with the official MongoDB driver.

Connect a Ruby application to TeselaDB with the official MongoDB driver for Ruby. TeselaDB presents itself as a mongos, so the driver works unchanged.

Requirements

Ruby with RubyGems.
The address of one or more nodes, a user with readWrite on the database and the pki/ca.pem file of the cluster.

Install the driver

Shell

gem install mongo

Store the connection string

Put the string in an environment variable instead of writing it in the code:

Shell

export TESELADB_URI="mongodb://user:<password>@node-01:27017,node-02:27017/shop?tls=true&tlsCAFile=./ca.pem"

Write and read a document

require "mongo"

client = Mongo::Client.new(ENV.fetch("TESELADB_URI"))
orders = client[:orders]
orders.insert_one(total: 149.5)
puts orders.count_documents

Check

The program prints the number of documents in orders, which grows by one each time you run it.

Common problems

The connection closes before authenticating because tls=true is missing from the string.
The driver does not trust the node certificate because it does not have the CA of this cluster.