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Connect to IBM Cloud Object Storage Data in Ruby
Connect to IBM Cloud Object Storage data in Ruby with ruby-dbi, dbd-odbc, and ruby-odbc.
The CData ODBC Driver for IBM Cloud Object Storage makes it easy to integrate connectivity to live IBM Cloud Object Storage data in Ruby. This article shows how to create a simple Ruby app that connects to IBM Cloud Object Storage data, executes a query, and displays the results.
Create an ODBC Connection to IBM Cloud Object Storage 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.
Register a New Instance of Cloud Object Storage
If you do not already have Cloud Object Storage in your IBM Cloud account, follow the procedure below to install an instance of SQL Query in your account:
- Log in to your IBM Cloud account.
- Navigate to the page, choose a name for your instance and click Create. You will be redirected to the instance of Cloud Object Storage you just created.
Connecting using OAuth Authentication
There are certain connection properties you need to set before you can connect. You can obtain these as follows:
API Key
To connect with IBM Cloud Object Storage, you need an API Key. You can obtain this as follows:
- Log in to your IBM Cloud account.
- Navigate to the Platform API Keys page.
- On the middle-right corner click "Create an IBM Cloud API Key" to create a new API Key.
- In the pop-up window, specify the API Key name and click "Create". Note the API Key as you can never access it again from the dashboard.
Cloud Object Storage CRN
If you have multiple accounts, you will need to specify the CloudObjectStorageCRN explicitly. To find the appropriate value, you can:
- Query the Services view. This will list your IBM Cloud Object Storage instances along with the CRN for each.
- Locate the CRN directly in IBM Cloud. To do so, navigate to your IBM Cloud Dashboard. In the Resource List, Under Storage, select your Cloud Object Storage resource to get its CRN.
Connecting to Data
You can now set the following to connect to data:
- InitiateOAuth: Set this to GETANDREFRESH. You can use InitiateOAuth to avoid repeating the OAuth exchange and manually setting the OAuthAccessToken.
- ApiKey: Set this to your API key which was noted during setup.
- CloudObjectStorageCRN (Optional): Set this to the cloud object storage CRN you want to work with. While the connector attempts to retrieve this automatically, specifying this explicitly is recommended if you have more than Cloud Object Storage account.
When you connect, the connector completes the OAuth process.
- Extracts the access token and authenticates requests.
- Saves OAuth values in OAuthSettingsLocation to be persisted across connections.
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 IBM Cloud Object Storage Data
Create a new Ruby file (for example: IBMCloudObjectStorageSelect.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 IBMCloudObjectStorage Source','','')
#execute a SELECT query and store the result set
resultSet = cnxn.execute("SELECT Key, Etag FROM Objects WHERE Bucket = 'someBucket'")
#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 IBM Cloud Object Storage data with Ruby. To do so, simply run your file from the command line:
ruby IBMCloudObjectStorageSelect.rb
Writing SQL-92 queries to IBM Cloud Object Storage allows you to quickly and easily incorporate IBM Cloud Object Storage data into your own Ruby applications. Download a free trial today!
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IBM Cloud Object Storage ODBC Driver
The IBM Cloud Object Storage ODBC Driver is a powerful tool that allows you to connect with live data from IBM Cloud Object Storage, directly from any applications that support ODBC connectivity.
Access IBM Cloud Object Storage data like you would a database - read, write, and update IBM Cloud Object Storage IBMCloudObject, etc. through a standard ODBC Driver interface.
