Module: Aws::PageableResponse

Defined in:
lib/aws-sdk-core/pageable_response.rb

Overview

Decorates a Seahorse::Client::Response with paging methods:

resp = s3.list_objects(params)
resp.last_page?
#=> false

# sends a request to receive the next response page
resp = resp.next_page
resp.last_page?
#=> true

resp.next_page
#=> raises PageableResponse::LastPageError

You can enumerate all response pages with a block

ec2.describe_instances(params).each do |page|
  # yields once per page
  page.reservations.each do |r|
    # ...
  end
end

Or using #next_page and #last_page?:

resp.last_page?
resp = resp.next_page until resp.last_page?

Defined Under Namespace

Modules: UnsafeEnumerableMethods Classes: LastPageError

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#pager ⇒ Paging::Pager

Returns:

  • (Paging::Pager) 


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# File 'lib/aws-sdk-core/pageable_response.rb', line 41

def pager
  @pager
end

Class Method Details

.extended(base) ⇒ Object 



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# File 'lib/aws-sdk-core/pageable_response.rb', line 33

def self.extended(base)
  base.send(:extend, Enumerable)
  base.send(:extend, UnsafeEnumerableMethods)
  base.instance_variable_set("@last_page", nil)
  base.instance_variable_set("@more_results", nil)
end

Instance Method Details

#each {|response| ... } ⇒ Enumerable? Also known as: each_page

Yields the current and each following response to the given block.

Yield Parameters:

  • response (Response)

Returns:

  • (Enumerable, nil) —

    Returns a new Enumerable if no block is given.



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# File 'lib/aws-sdk-core/pageable_response.rb', line 72

def each(&block)
  return enum_for(:each_page) unless block_given?
  response = self
  yield(response)
  until response.last_page?
    response = response.next_page
    yield(response)
  end
end

#last_page? ⇒ Boolean

Returns ‘true` if there are no more results. Calling #next_page when this method returns `false` will raise an error.

Returns:

  • (Boolean) 


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# File 'lib/aws-sdk-core/pageable_response.rb', line 46

def last_page?
  if @last_page.nil?
    @last_page = !@pager.truncated?(self)
  end
  @last_page
end

#next_page(params = {}) ⇒ Seahorse::Client::Response

Returns:



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# File 'lib/aws-sdk-core/pageable_response.rb', line 61

def next_page(params = {})
  if last_page?
    raise LastPageError.new(self)
  else
    next_response(params)
  end
end

#next_page? ⇒ Boolean

Returns ‘true` if there are more results. Calling #next_page will return the next response.

Returns:

  • (Boolean) 


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# File 'lib/aws-sdk-core/pageable_response.rb', line 56

def next_page?
  !last_page?
end