dynamodb.rb

# -*- coding: utf-8 -*- 
require 'aws-sdk' 
class DynamoDB 
  @@dynamodb = nil 
  def self.instance 
    return @@dynamodb if @@dynamodb 
    credentials = Aws::Credentials.new('aws_access_key', 'aws_secret_key') 
    dynamo_config = { region: 'ap-northeast-1', credentials: credentials, }
    if Rails.env != 'production' #本番環境以外ではDynamoDB Localを利用 
      dynamo_config[:endpoint] = "http://localhost:8000" 
    end 
    @@dynamodb = Aws::DynamoDB::Client.new(dynamo_config) 
  end 
end