Connect to Redis Data in Ruby

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Redis ODBC Driver

The Redis ODBC Driver is a powerful tool that allows you to connect with Redis high-performance data stores, directly from any applications that support ODBC connectivity.

Read, write, and update Redis data through a standard ODBC Driver interface.



Connect to Redis data in Ruby with ruby-dbi, dbd-odbc, and ruby-odbc.

The CData ODBC Driver for Redis makes it easy to integrate connectivity to live Redis data in Ruby. This article shows how to create a simple Ruby app that connects to Redis data, executes a query, and displays the results.

Create an ODBC Connection to Redis Data

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Set the following connection properties to connect to a Redis instance:

  • Server: Set this to the name or address of the server your Redis instance is running on. You can specify the port in Port.
  • Password: Set this to the password used to authenticate with a password-protected Redis instance , using the Redis AUTH command.

Set UseSSL to negotiate SSL/TLS encryption when you connect.

Installing Ruby and Necessary Gems

If you do not have Ruby installed, refer to the Ruby installation page. With Ruby installed, you will need to install the ruby-dbi, dbd-odbc, and ruby-odbc gems:

gem install dbi gem install dbd-odbc gem install ruby-odbc

Create a Ruby App with Connectivity to Redis Data

Create a new Ruby file (for example: RedisSelect.rb) and open it in a text editor. Copy the following code into your file:

#connect to the DSN require 'DBI' cnxn = DBI.connect('DBI:ODBC:CData Redis Source','','') #execute a SELECT query and store the result set resultSet = cnxn.execute("SELECT City, CompanyName FROM Customers") #display the names of the columns resultSet.column_names.each do |name| print name, "\t" end puts #display the results while row = resultSet.fetch do (0..resultSet.column_names.size - 1).each do |n| print row[n], "\t" end puts end resultSet.finish #close the connection cnxn.disconnect if cnxn

With the file completed, you are ready to display your Redis data with Ruby. To do so, simply run your file from the command line:

ruby RedisSelect.rb Writing SQL-92 queries to Redis allows you to quickly and easily incorporate Redis data into your own Ruby applications. Download a free trial today!