Module: Intermodal::Proxies::WillPaginate::Collection

Defined in:
lib/intermodal/proxies/will_paginate.rb

Instance Method Summary collapse

Instance Method Details

#as_json(*args) ⇒ Object

TODO: This needs its own spec



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# File 'lib/intermodal/proxies/will_paginate.rb', line 14

def as_json(*args)
  options = args.extract_options!
  _root = options.delete(:root)
  _collection_name = _root || :collection

  # Scrub out everything else
  presenter_options = {
    :root => (options[:always_nest_collections] && _root ? _collection_name.to_s.singularize : nil),
    :always_nest_collections => options[:always_nest_collections],
    :scope => options[:scope],
    :presenter => options[:presenter] }
  pagination_info.merge({ _collection_name => self.to_a.as_json(presenter_options)})
end

#pagination_info ⇒ Object 



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# File 'lib/intermodal/proxies/will_paginate.rb', line 6

def pagination_info
  { :page => self.current_page.to_i,
    :per_page => self.per_page.to_i,
    :total_pages => self.total_pages,
    :total_entries => self.total_entries }
end

#to_xml(*args) ⇒ Object

TODO: This needs its own spec TODO: Should be refactored to have clearer code



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# File 'lib/intermodal/proxies/will_paginate.rb', line 30

def to_xml(*args)
  options = args.extract_options!
  _collection = self

  # For a paginated collection of say, books, we want the following output:
  #
  # <books>
  #   <collection>
  #     <book>
  #       <title> ... </title>
  # ...
  #
  # Since Rails 3.0 magically assumes that a hash
  # 
  #   { :collection => [ {:title => ' ... ' } ] } 
  #
  # outputs to
  #
  #   <collection>
  #     <collection>
  #       <title> ... </title>
  #
  # We need to use a custom builder. We use very kludgy code, by calling #to_xml
  # again, but override builder so it will nest things properly.
  #
  # Actually, it is also depending on some magic. Presenter/API options are saved
  # in the builder class, so it uses that. Which means this isn't side-effect-free
  # code. Ugh.
  #
  # Ultimately, this needs to be more modular so that API writers can specify their
  # own builder. For now, we'll dictate the auto-generated XML and wait until someone
  # complains about it in the Github Issues tracker.
  collection_builder = proc do |opts, key|
    _builder = opts[:builder]

    _builder.collection do
      _collection.to_a.map do |r| 
        r.presentation(options.except(:root)).
          to_xml(
            :root => r.class.name.demodulize.underscore,
            :builder => opts[:builder],
            :skip_instruct => true )
      end
    end
  end

  # Merge information such as current page, total pages, total entries, etc.
  pagination_info.
    merge({ :collection => collection_builder }).
    to_xml(options)
end