require 'active_support/core_ext/hash/keys' require 'active_support/core_ext/hash/reverse_merge' require 'active_support/inflector' class Array # Converts the array to a comma-separated sentence where the last element is joined by the connector word. Options: # * :words_connector - The sign or word used to join the elements in arrays with two or more elements (default: ", ") # * :two_words_connector - The sign or word used to join the elements in arrays with two elements (default: " and ") # * :last_word_connector - The sign or word used to join the last element in arrays with three or more elements (default: ", and ") def to_sentence(options = {}) default_words_connector = I18n.translate(:'support.array.words_connector', :locale => options[:locale]) default_two_words_connector = I18n.translate(:'support.array.two_words_connector', :locale => options[:locale]) default_last_word_connector = I18n.translate(:'support.array.last_word_connector', :locale => options[:locale]) # Try to emulate to_sentences previous to 2.3 if options.has_key?(:connector) || options.has_key?(:skip_last_comma) ::ActiveSupport::Deprecation.warn(":connector has been deprecated. Use :words_connector instead", caller) if options.has_key? :connector ::ActiveSupport::Deprecation.warn(":skip_last_comma has been deprecated. Use :last_word_connector instead", caller) if options.has_key? :skip_last_comma skip_last_comma = options.delete :skip_last_comma if connector = options.delete(:connector) options[:last_word_connector] ||= skip_last_comma ? connector : ", #{connector}" else options[:last_word_connector] ||= skip_last_comma ? default_two_words_connector : default_last_word_connector end end options.assert_valid_keys(:words_connector, :two_words_connector, :last_word_connector, :locale) options.reverse_merge! :words_connector => default_words_connector, :two_words_connector => default_two_words_connector, :last_word_connector => default_last_word_connector case length when 0 "" when 1 self[0].to_s when 2 "#{self[0]}#{options[:two_words_connector]}#{self[1]}" else "#{self[0...-1].join(options[:words_connector])}#{options[:last_word_connector]}#{self[-1]}" end end # Calls to_param on all its elements and joins the result with # slashes. This is used by url_for in Action Pack. def to_param collect { |e| e.to_param }.join '/' end # Converts an array into a string suitable for use as a URL query string, # using the given +key+ as the param name. # # ['Rails', 'coding'].to_query('hobbies') # => "hobbies%5B%5D=Rails&hobbies%5B%5D=coding" def to_query(key) prefix = "#{key}[]" collect { |value| value.to_query(prefix) }.join '&' end # Converts a collection of elements into a formatted string by calling # to_s on all elements and joining them: # # Blog.find(:all).to_formatted_s # => "First PostSecond PostThird Post" # # Adding in the :db argument as the format yields a prettier # output: # # Blog.find(:all).to_formatted_s(:db) # => "First Post,Second Post,Third Post" def to_formatted_s(format = :default) case format when :db if respond_to?(:empty?) && self.empty? "null" else collect { |element| element.id }.join(",") end else to_default_s end end alias_method :to_default_s, :to_s alias_method :to_s, :to_formatted_s # Returns a string that represents this array in XML by sending +to_xml+ # to each element. Active Record collections delegate their representation # in XML to this method. # # All elements are expected to respond to +to_xml+, if any of them does # not an exception is raised. # # The root node reflects the class name of the first element in plural # if all elements belong to the same type and that's not Hash: # # customer.projects.to_xml # # # # # 20000.0 # 1567 # 2008-04-09 # ... # # # 57230.0 # 1567 # 2008-04-15 # ... # # # # Otherwise the root element is "records": # # [{:foo => 1, :bar => 2}, {:baz => 3}].to_xml # # # # # 2 # 1 # # # 3 # # # # If the collection is empty the root element is "nil-classes" by default: # # [].to_xml # # # # # To ensure a meaningful root element use the :root option: # # customer_with_no_projects.projects.to_xml(:root => "projects") # # # # # By default root children have as node name the one of the root # singularized. You can change it with the :children option. # # The +options+ hash is passed downwards: # # Message.all.to_xml(:skip_types => true) # # # # # 2008-03-07T09:58:18+01:00 # 1 # 1 # 2008-03-07T09:58:18+01:00 # 1 # # # def to_xml(options = {}) raise "Not all elements respond to to_xml" unless all? { |e| e.respond_to? :to_xml } require 'builder' unless defined?(Builder) options = options.dup options[:root] ||= all? { |e| e.is_a?(first.class) && first.class.to_s != "Hash" } ? ActiveSupport::Inflector.pluralize(ActiveSupport::Inflector.underscore(first.class.name)) : "records" options[:children] ||= options[:root].singularize options[:indent] ||= 2 options[:builder] ||= Builder::XmlMarkup.new(:indent => options[:indent]) root = options.delete(:root).to_s children = options.delete(:children) if !options.has_key?(:dasherize) || options[:dasherize] root = root.dasherize end options[:builder].instruct! unless options.delete(:skip_instruct) opts = options.merge({ :root => children }) xml = options[:builder] if empty? xml.tag!(root, options[:skip_types] ? {} : {:type => "array"}) else xml.tag!(root, options[:skip_types] ? {} : {:type => "array"}) { yield xml if block_given? each { |e| e.to_xml(opts.merge({ :skip_instruct => true })) } } end end end