1.
One project,three gems Mike Williams Cogent Consulting in association with

2.
Architecture“Atlas” <stuff/>

3.
arborealGrowing Trees (restaurant) (hotel) Melbourne Sydney Geelong Victoria NSW (sight) WA Australia New Zealand Pacific Europe Asia WORLD Americas Africa

4.
arborealhow do I select this? Melbourne Sydney Geelong Victoria NSW WA Australia New Zealand Pacific Europe Asia WORLD Americas Africa

5.
arborealPath Enumeration@victoria = Place.find_by_name(“Victoria”)@victoria.ancestry_string#=> “-4-14-15-” Melbourne Sydney Geelong Victoria NSW Australia 15 WA New Zealand Pacific 14 Europe WORLD 4 Asia Americas Africa

6.
arboreal@victoria.ancestorsSELECT * FROM places WHERE (id in (4,14,15)) Melbourne Sydney Geelong Victoria NSW Australia 15 WA New Zealand Pacific 14 Europe WORLD 4 Asia Americas Africa

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arboreal@australia = Place.find_by_name(“Australia”)@australia.childrenSELECT * FROM places WHERE (places.parent_id = 15) Melbourne Sydney Geelong Victoria NSW Australia 15 WA New Zealand Pacific Europe Asia WORLD Americas Africa

8.
arboreal@australia.descendantsSELECT * FROM places WHERE (places.ancestry_string like ‘-4-14-15-%’) “-4-14-15-22-” Melbourne Sydney “-4-14-15-16-” Geelong Victoria NSW “-4-14-15-” WA Australia New Zealand Pacific Europe Asia WORLD Americas Africa

9.
arboreal@australia.subtreeSELECT * FROM places WHERE (places.id = 15 OR places.ancestry_string like ‘-4-14-15-%’) “-4-14-15-22-” Melbourne Sydney “-4-14-15-16-” Geelong Victoria NSW “-4-14-15-” Australia 15 WA New Zealand Pacific Europe Asia WORLD Americas Africa

10.
arboreal@australia.subtree.scope(:find, :conditions)#=> [“places.id = ? OR places.ancestry_string like ?”, 15, “-4-14-15-%”]class Place def contained_pois Poi.scoped(:include => :place, :conditions => subtree.scope(:find, :conditions)) endend@australia.contained_poisSELECT ... FROM pois LEFT OUTER JOIN places ON places.id = pois.place_id WHERE (places.id = 15 OR places.ancestry_string like ‘-4-14-15-%’)

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arboreal@australia.contained_poisSELECT ... FROM pois LEFT OUTER JOIN places ON places.id = pois.place_id WHERE (places.id = 15 OR places.ancestry_string like ‘-4-14-15-%’) Melbourne Sydney Geelong Victoria NSW WA Australia New Zealand Pacific Europe Asia WORLD Americas Africa

12.
GET http://stuff.local/places/15/pois “Atlas” <pois/>

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<pois type="array"> <poi> <created-at type="datetime">2010-08-25T23:35:59Z</created-at> <email nil="true"></email> <id type="integer">6</id> <latitude type="decimal">-37.8002389992226</latitude> <longitude type="decimal">144.901535511017</longitude> <name>Footscray Market</name> <place-id type="integer">26</place-id> <review>A frenetic covered food market.</review> <type>See</type> <updated-at type="datetime">2010-08-25T23:35:59Z</updated-at> <url nil="true"></url> </poi> <poi> <created-at type="datetime">2010-08-25T23:35:59Z</created-at> <email nil="true"></email> <id type="integer">7</id> <latitude type="decimal">-37.8020224141169</latitude> <longitude type="decimal">144.983611106873</longitude> <name>Panama Dining Room</name> <place-id type="integer">26</place-id> <review>Franco-Fitzroy pub grub and ersatz Manhattan views.</review> <type>Eat</type> <updated-at type="datetime">2010-08-25T23:35:59Z</updated-at> <url nil="true"></url> </poi> ...

14.
<pois type="array"> <poi href="http://stuff.local/pois/6"> <name>Footscray Market</name> <type>See</type> <review>A frenetic covered food market.</review> <place href="http://stuff.local/places/26"> <name>Melbourne</name> </place> </poi> <poi href="http://stuff.local/pois/7"> <name>Panama Dining Room</name> <type>Eat</type> <review>Franco-Fitzroy pub grub and ersatz Manhattan views.</review> <place href="http://stuff.local/places/26"> <name>Melbourne</name> </place> </poi> <poi href="http://stuff.local/pois/8"> <name>Sydney Opera House</name> <type>See</type> <review/> <place href="http://stuff.local/places/17"> <name>Sydney</name> </place> </poi></pois>

15.
# BEFORE ...xml.pois :type => “array” do @pois.each do |poi| xml.poi :href => poi_url(poi) do xml.name(poi.name) xml.type(poi.type) xml.review(poi.review) xml.place :href => place_url(poi.place) do xml.name poi.place.name end end endend

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# BEFORE ... representativexml.pois :type => “array” do @pois.each do |poi| xml.poi :href => poi_url(poi) do xml.name(poi.name) xml.type(poi.type) xml.review(poi.review) xml.place :href => place_url(poi.place) do xml.name poi.place.name end end endend# AFTER ...Representative::Xml.new(xml) do |r| r.list_of :pois, @pois, :item_attributes => {:href => method(:poi_url)} do r.element :name r.element :type r.element :review r.element :place, :href => method(:place_url) do r.element :name end endend

17.
# XML ... representativeRepresentative::Xml.new(xml) do |r| r.list_of :pois, @pois, :item_attributes => {:href => method(:poi_url)} do r.element :name r.element :type r.element :review r.element :place, :href => method(:place_url) do r.element :name end endend# JSON ...Representative::Json.new do |r| r.list_of :pois, @pois, :item_attributes => {:href => method(:poi_url)} do r.element :name r.element :type r.element :review r.element :place, :href => method(:place_url) do r.element :name end endend.to_s

18.
<pois type="array"> <poi href="http://stuff.local/pois/6"> <name>Footscray Market</name> <type>See</type> <review>A frenetic covered food market.</review> <place href="http://stuff.local/places/26"> <name>Melbourne</name> </place> </poi> <poi href="http://stuff.local/pois/7"> <name>Panama Dining Room</name> <type>Eat</type> <review>Franco-Fitzroy pub grub and ersatz Manhattan views.</review> <place href="http://stuff.local/places/26"> <name>Melbourne</name> </place> </poi> <poi href="http://stuff.local/pois/8"> <name>Sydney Opera House</name> <type>See</type> <review/> <place href="http://stuff.local/places/17"> <name>Sydney</name> </place> </poi></pois>

19.
representative[ { "name": "Footscray Market", "type": "See", "review": "A frenetic covered food market.", "place": { "name": "Melbourne" } }, { "name": "Panama Dining Room", "type": "Eat", "review": "Franco-Fitzroy pub grub and ersatz Manhattan views.", "place": { "name": "Melbourne" } }, { "name": "Sydney Opera House", "type": "See", "review": null, "place": { "name": "Sydney" } }]

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“Atlas” <pois/>

21.
<pois/> something that wants POI data

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<pois/> somethingfake that wantsAtlas POI data

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sham rackrequire ‘fakeweb’FakeWeb.register_uri(:get, “http://www.example.com/hello”, :body => “Hello World!”)require ‘webmock’stub_request(:get, “www.example.com/hello”).to_return(:body => “Hello, World!”)require ‘sham_rack’ShamRack.at(“www.example.com”).stub.register_resource(“/hello”, “Hello, World!”)

24.
sham rackIt’s just Rack!client Net::HTTP Sham Rack Rack app

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sham rackIt’s just Rack!ShamRack.at("www.example.com”) do |env| [ "200 OK", { "Content-type" => "text/plain" }, "Hello, world!" ]endShamRack.at("www.example.com").rackup do use Some::Middleware use Some::Other::Middleware run MyApp.newend

26.
sham rackIt’s just Rack!ShamRack.at("www.example.com").sinatra do get "/hello/:subject" do "Hello, #{params[:subject]}" endend

27.
http://github.com/mdub/arborealhttp://github.com/mdub/representativehttp://github.com/mdub/sham_rack