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Editorial Team
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Asked: 2026-06-09T06:29:42+00:00

I am developing a Rails application for AWS and would like to create drop

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I am developing a Rails application for AWS and would like to create drop down menu for region names, like “us-east-1” etc.

If someone already created gem to get them, I want to use it. Does anyone know such a gem or useful API?

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  1. Editorial Team

    The AWS SDK for Ruby (aws-sdk gem) supports enumerating region names:

    require 'aws-sdk'

ec2 = AWS::EC2.new(:access_key_id => '...', :secret_access_key => '...')
ec2.regions.map(&:name)
=> ["eu-west-1", "sa-east-1", "us-east-1", "ap-northeast-1", "us-west-2", "us-west-1", "ap-southeast-1"]

    You can also use a client interface to the DescribeRegions call:

    ec2.client.describe_regions
=> { :region_info=>[
    {:region_name=>"eu-west-1", :region_endpoint=>"ec2.eu-west-1.amazonaws.com"}, 
    {:region_name=>"sa-east-1", :region_endpoint=>"ec2.sa-east-1.amazonaws.com"}, 
    {:region_name=>"us-east-1", :region_endpoint=>"ec2.us-east-1.amazonaws.com"}, 
    {:region_name=>"ap-northeast-1", :region_endpoint=>"ec2.ap-northeast-1.amazonaws.com"}, 
    {:region_name=>"us-west-2", :region_endpoint=>"ec2.us-west-2.amazonaws.com"}, 
    {:region_name=>"us-west-1", :region_endpoint=>"ec2.us-west-1.amazonaws.com"}, 
    {:region_name=>"ap-southeast-1", :region_endpoint=>"ec2.ap-southeast-1.amazonaws.com"}
  ], 
  :request_id=>"04458cac-bdf2-4847-bf1f-c7ea65813777"
}

    You can view the gem docs here: http://docs.amazonwebservices.com/AWSRubySDK/latest/frames.html

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