class Supercast::DataList
Constants
- OBJECT_NAME
Attributes
This accessor allows a `DataList` to inherit various filters that were given to a predecessor. This allows for things like consistent limits, expansions, and predicates as a user pages through resources.
Public Class Methods
An empty list object. This is returned from next
when we know that there isn't a next page in order to replicate the behavior of the API when it attempts to return a page beyond the last.
# File lib/supercast/data_list.rb, line 20 def self.empty_list(opts = {}) DataList.construct_from({ data: [] }, opts) end
# File lib/supercast/data_list.rb, line 24 def initialize(*args) super self.filters = {} end
Public Instance Methods
# File lib/supercast/data_list.rb, line 29 def [](key) case key when String, Symbol super else raise ArgumentError, "You tried to access the #{key.inspect} index, but DataList " \ 'types only support String keys. (HINT: List calls return an ' \ "object with a 'data' (which is the data array). You likely " \ "want to call #data[#{key.inspect}])" end end
Iterates through each resource in all pages, making additional fetches to the API as necessary.
Note that this method will make as many API calls as necessary to fetch all resources. For more granular control, please see each
and next_page
.
# File lib/supercast/data_list.rb, line 57 def auto_paging_each(&blk) return enum_for(:auto_paging_each) unless block_given? page = self loop do page.each(&blk) page = page.next_page break if page.empty? end end
Iterates through each resource in the page represented by the current `DataList`.
Note that this method makes no effort to fetch a new page when it gets to the end of the current page's resources. See also auto_paging_each
.
# File lib/supercast/data_list.rb, line 47 def each(&blk) data.each(&blk) end
Returns true if the page object contains no elements.
# File lib/supercast/data_list.rb, line 70 def empty? data.empty? end
Fetches the next page in the resource list (if there is one).
This method will try to respect the limit of the current page. If none was given, the default limit will be fetched again.
# File lib/supercast/data_list.rb, line 85 def next_page(params = {}, opts = {}) return self.class.empty_list(opts) unless defined?(page) && defined?(per_page) && defined?(total) && page * per_page < total params = filters.merge(page: page + 1).merge(params) list(params, opts) end
Fetches the previous page in the resource list (if there is one).
This method will try to respect the limit of the current page. If none was given, the default limit will be fetched again.
# File lib/supercast/data_list.rb, line 97 def previous_page(params = {}, opts = {}) return self.class.empty_list(opts) unless page && page > 1 params = filters.merge(page: page - 1).merge(params) list(params, opts) end
# File lib/supercast/data_list.rb, line 105 def resource_url url || raise(ArgumentError, "List object does not contain a 'url' field.") end
# File lib/supercast/data_list.rb, line 74 def retrieve(id, opts = {}) id, retrieve_params = Util.normalize_id(id) resp, opts = request(:get, "#{resource_url}/#{CGI.escape(id)}", retrieve_params, opts) Util.convert_to_supercast_object(resp.data, opts) end