Updating an Amazon DynamoDB Table Item - AWS SDK for Ruby

Updating an Amazon DynamoDB Table Item

The following example updates the rating to 0.1 for the item with the year 2015 and title The Big New Movie in the Movies table in the us-west-2 region.

# Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. # # This file is licensed under the Apache License, Version 2.0 (the "License"). # You may not use this file except in compliance with the License. A copy of the # License is located at # # http://aws.amazon.com/apache2.0/ # # This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS # OF ANY KIND, either express or implied. See the License for the specific # language governing permissions and limitations under the License. require 'aws-sdk-dynamodb' # v2: require 'aws-sdk' # Create dynamodb client in us-west-2 region dynamodb = Aws::DynamoDB::Client.new(region: 'us-west-2') params = { table_name: 'Movies', key: { year: 2015, title: 'The Big New Movie' }, update_expression: 'set info.rating = :r', expression_attribute_values: {':r' => 0.1}, return_values: 'UPDATED_NEW' } begin dynamodb.update_item(params) puts 'Rating successfully set' rescue Aws::DynamoDB::Errors::ServiceError => error puts 'Unable to set rating:' puts error.message end

See the complete example on GitHub.