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Showing content from https://docs.aws.amazon.com/sdkforruby/api/Aws/Plugins/DynamoDBSimpleAttributes.html below:

DynamoDBSimpleAttributes — AWS SDK for Ruby V2

You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.

Simplifies working with Amazon DynamoDB attribute values. Translates attribute values for requests and responses to sensible Ruby natives.

This plugin is enabled by default for all DynamoDB::Client objects. You can disable this plugin by passing simple_attributes: false to the client constructor:

ddb = Aws::DynamoDB::Client.new(simple_attributes: false)

With this plugin enabled, simple_attributes: true:

dynamodb.put_item(
  table_name: 'aws-sdk',
  item: {
    id: 'uuid',
    age: 35,
    tags: Set.new(%w(simple attributes)),
    data: StringIO.new('data'),
    scores: [5, 4.5, 4.9, nil],
    name: {
      first: 'John',
      last: 'Doe',
    }
  }
)

With this plugin disabled, simple_attributes: false:

dynamodb.put_item(
  table_name: 'aws-sdk',
  item: {
    'id' => { s: 'uuid' },
    'age' => { n: '35' },
    'tags' => { ss: ['simple', 'attributes'] },
    'data' => { b: 'data' },
    'scores' => {
      l: [
        { n: '5' },
        { n: '4.5' },
        { n: '4.9' },
        { null: true },
      ]
    },
    'name' => {
      m: {
        'first' => { s: 'John' },
        'last' => { s: 'Doe' },
      }
    }
  }
)

With this plugin enabled, simple_attributes: true:

resp = dynamodb.get(table_name: 'aws-sdk', key: { id: 'uuid' })
resp.item
{
  id: 'uuid',
  age: 35,
  tags: Set.new(%w(simple attributes)),
  data: StringIO.new('data'),
  scores: [5, 4.5, 4.9, nil],
  name: {
    first: 'John',
    last: 'Doe',
  }
}

With this plugin disabled, simple_attributes: false:

resp = dynamodb.get(table_name: 'aws-sdk', key: { 'id' => { s: 'uuid' }})
resp.item

Classes: Handler

• #add_handlers(handlers, config) ⇒ Object

#add_options, #after_initialize, after_initialize, #before_initialize, before_initialize, option

#handle, #handle_request, #handle_response

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103
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# File 'aws-sdk-core/lib/aws-sdk-core/plugins/dynamodb_simple_attributes.rb', line 102

def add_handlers(handlers, config)
  if config.simple_attributes
    handlers.add(Handler, step: :initialize)
  end
end

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