AWS DynamoDB table creation (composite primary_key)

create_table_composite_primary.rb

require 'aws-sdk'

AWS_ACCESS_KEY = 'your_aws_access_key'
AWS_SECRET_KEY = 'your_aws_secret_key'

dynamo_db = AWS::DynamoDB.new(:access_key_id => AWS_ACCESS_KEY, :secret_access_key => AWS_SECRET_KEY)

# create a table (50 read and 50 write capacity units)
# create composite index using hash_key (:user_id) and range_key (:created_at)

table = dynamo_db.tables.create("tweets", 50, 50,
                                :hash_key => { :user_id => :number },
                                :range_key => { :created_at => :number })