#!/usr/bin/ruby require 'aws-sdk-core' ddb = Aws::DynamoDB::Client.new( endpoint: 'http://localhost:8000', region: 'ap-northeast-1' ) pp ddb.operation_names [:batch_get_item, :batch_write_item, :create_table, :delete_item, :delete_table, :describe_table, :get_item, :list_tables, :put_item, :query, :scan, :update_item, :update_table] options = { table_name: "table_name", key_schema: [ { attribute_n