class Google::Cloud::Bigquery::Dataset::List
Dataset::List
is a special case Array with additional values.
Attributes
A hash of this page of results.
If not empty, indicates that there are more records that match the request and this value should be passed to continue.
Public Class Methods
@private New Dataset::List
from a response object.
# File lib/google/cloud/bigquery/dataset/list.rb, line 140 def self.from_gapi gapi_list, service, hidden = nil, filter = nil, max = nil datasets = List.new(Array(gapi_list.datasets).map { |gapi_object| Dataset.from_gapi gapi_object, service }) datasets.instance_variable_set :@token, gapi_list.next_page_token datasets.instance_variable_set :@etag, gapi_list.etag datasets.instance_variable_set :@service, service datasets.instance_variable_set :@hidden, hidden datasets.instance_variable_set :@filter, filter datasets.instance_variable_set :@max, max datasets end
@private Create a new Dataset::List
with an array of datasets.
# File lib/google/cloud/bigquery/dataset/list.rb, line 35 def initialize arr = [] super arr end
Public Instance Methods
Retrieves remaining results by repeatedly invoking {#next} until {#next?} returns `false`. Calls the given block once for each result, which is passed as the argument to the block.
An Enumerator is returned if no block is given.
This method will make repeated API calls until all remaining results are retrieved. (Unlike `#each`, for example, which merely iterates over the results returned by a single API call.) Use with caution.
@param [Integer] request_limit The upper limit of API requests to
make to load all datasets. Default is no limit.
@yield [dataset] The block for accessing each dataset. @yieldparam [Dataset] dataset The dataset object.
@return [Enumerator]
@example Iterating each result by passing a block:
require "google/cloud/bigquery" bigquery = Google::Cloud::Bigquery.new bigquery.datasets.all do |dataset| puts dataset.name end
@example Using the enumerator by not passing a block:
require "google/cloud/bigquery" bigquery = Google::Cloud::Bigquery.new all_names = bigquery.datasets.all.map do |dataset| dataset.name end
@example Limit the number of API calls made:
require "google/cloud/bigquery" bigquery = Google::Cloud::Bigquery.new bigquery.datasets.all(request_limit: 10) do |dataset| puts dataset.name end
# File lib/google/cloud/bigquery/dataset/list.rb, line 123 def all request_limit: nil, &block request_limit = request_limit.to_i if request_limit return enum_for :all, request_limit: request_limit unless block_given? results = self loop do results.each(&block) if request_limit request_limit -= 1 break if request_limit.negative? end break unless results.next? results = results.next end end
Retrieve the next page of datasets.
@return [Dataset::List]
@example
require "google/cloud/bigquery" bigquery = Google::Cloud::Bigquery.new datasets = bigquery.datasets if datasets.next? next_datasets = datasets.next end
# File lib/google/cloud/bigquery/dataset/list.rb, line 71 def next return nil unless next? ensure_service! gapi = @service.list_datasets all: @hidden, filter: @filter, token: token, max: @max self.class.from_gapi gapi, @service, @hidden, @filter, @max end
Whether there is a next page of datasets.
@return [Boolean]
@example
require "google/cloud/bigquery" bigquery = Google::Cloud::Bigquery.new datasets = bigquery.datasets if datasets.next? next_datasets = datasets.next end
# File lib/google/cloud/bigquery/dataset/list.rb, line 53 def next? !token.nil? end
Protected Instance Methods
Raise an error unless an active service is available.
# File lib/google/cloud/bigquery/dataset/list.rb, line 155 def ensure_service! raise "Must have active connection" unless @service end