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Connect to OData Services in Ruby
Connect to OData services in Ruby with ruby-dbi, dbd-odbc, and ruby-odbc.
The CData ODBC Driver for OData makes it easy to integrate connectivity to live OData services in Ruby. This article shows how to create a simple Ruby app that connects to OData services, executes a query, and displays the results.
About OData Data Integration
CData simplifies access and integration of live OData services data. Our customers leverage CData connectivity to:
- Access OData versions 2.0, 3.0, and 4.0, working with legacy services and the latest features and capabilities.
- Leverage advanced query options, including $filter, $select, and $expand, enhancing data retrieval from 3rd party tools.
- Use Server-side execution of aggregation and grouping to minimize data transfer and boost performance.
- Authenticate securely using a variety of schemes, including Azure AD, digest, negotiate, NTLM, OAuth, and more means secure authentication with every connection.
- Use SQL stored procedures to manage OData service entities - listing, creating, and removing associations between entities.
Customers use CData's solutions to regularly integrate their OData services with preferred tools, such as Power BI, MicroStrategy, or Tableau, and to replicate data from OData services to their databases or data warehouses.
Getting Started
Create an ODBC Connection to OData Services
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.
The User and Password properties, under the Authentication section, must be set to valid OData user credentials. In addition, specify a URL to a valid OData server organization root or OData services file.
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 OData Services
Create a new Ruby file (for example: ODataSelect.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 OData Source','','')
#execute a SELECT query and store the result set
resultSet = cnxn.execute("SELECT Orders.Freight, Customers.ContactName FROM Customers INNER JOIN Orders ON Customers.CustomerId=Orders.CustomerId")
#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 OData services with Ruby. To do so, simply run your file from the command line:
ruby ODataSelect.rb
Writing SQL-92 queries to OData allows you to quickly and easily incorporate OData services into your own Ruby applications. Download a free trial today!
Ready to get started?
Download a free trial of the OData ODBC Driver to get started:
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OData ODBC Driver
The OData ODBC Driver is a powerful tool that allows you to connect with live OData Services, directly from any applications that support ODBC connectivity.
Access OData services like you would any standard database - read, write, and update etc. through a standard ODBC Driver interface.
