更新 Amazon DynamoDB 表项目 - 适用于 Ruby 的 AWS 开发工具包
AWS 文档中描述的 AWS 服务或功能可能因区域而异。要查看适用于中国区域的差异,请参阅中国的 AWS 服务入门

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更新 Amazon DynamoDB 表项目

以下示例将 区域的 表中 year2015titleThe Big New Movie 的项目的评级更新为 Movies0.1us-west-2

# 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

请参阅 上的完整示例GitHub。