AWS SDK v2 for s3 - ruby

Question

Can any one provide me a good documentation for uploading files to S3 using asw-sdk Version 2. I checked out the main doc and in v1 we used to do like
s3 = AWS::S3.new
obj = s3.buckets['my-bucket']
Now in v2 when I try as
s3 = Aws::S3::Client.new
am ending up with
Aws::Errors::MissingRegionError: missing region; use :region option or export region name to ENV['AWS_REGION']
Can anyone help me with this?

Answer 1

As per official documentation:
To use the Ruby SDK, you must configure a region and credentials.
Therefore,
s3 = Aws::S3::Client.new(region:'us-west-2')
Alternatively, a default region can be loaded from one of the following locations:
Aws.config[:region]
ENV['AWS_REGION']

Answer 2

Here's a complete S3 demo on aws v2 gem that worked for me:
Aws.config.update(
region: 'us-east-1',
credentials: Aws::Credentials.new(
Figaro.env.s3_access_key_id,
Figaro.env.s3_secret_access_key
)
)
s3 = Aws::S3::Client.new
resp = s3.list_buckets
puts resp.buckets.map(&:name)
Gist
Official list of AWS region IDs here.
If you're unsure of the region, the best guess would be US Standard, which has the ID us-east-1 for config purposes, as shown above.

Answer 3

If you were using a aws.yml file for your credentials in Rails, you might want to create a file config/initializers/aws.rb with the following content:
filename = File.expand_path(File.join(Rails.root, "config", "aws.yml"))
config = YAML.load_file(filename)
aws_config = config[Rails.env.to_s].symbolize_keys
Aws.config.update({
region: aws_config[:region],
credentials: Aws::Credentials.new(aws_config[:access_key_id], aws_config[:secret_access_key])
})
The config/aws.yml file would need to be adapter to include the region.
development: &development
region: 'your region'
access_key_id: 'your access key'
secret_access_key: 'your secret access key'
production:
<<: *development