はじめてのCDQ

RubyMotion Kaigi 2014 (http://connpass.com/event/8254/) で発表した資料です。

Transcript

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10. TDIFNBఆٛ schema "0001" do entity "Movie" do string :title end end 4DIFNBT@JOJUJBMSC
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    $MBTT class Movie < CDQManagedObject ! end
14. *OJUJBMJ[F include CDQ def initilize_cdq # σϑΥϧτͰΑ͚Ε͹͠ͳͯ͘΋OK cdq.setup end
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17. $SFBUJPO include CDQ def create_objects Movie.create title:"Star Wars: A New Hope" Movie.create title:"Star Wars: The Empire Strikes Back " Movie.create title:"Star Wars: Return of the Jedi" cdq.save # ͜͜ͰॳΊͯอଘ͞ΕΔ end
18. 'FUDI def fetch_objects Movie.all.to_a Movie.to_a Movie.first # last͸͋Γ·ͤΜ Movie[0] Movie.each{|m| p m} Movie.count end
19. 2VFSZ def fetch_objects Movie .where(:title) .eq("Star Wars: A New Hope”) .first ! Movie .where(:title) .contains("Star Wars”)[0] ! Movie .where(:title) .contains("Star Wars”) .and .contains(“Hope") .first end
20. 4DPQF class Movie < CDQManagedObject scope :starwars, where(:title).contains("Star Wars:") end def query_with_scope Movie.starwars.first end
21. 0SEFSJOHT def query_with_orderings ! Movie.all .sort_by(:title) .map(&:title) ! Movie.all .sort_by(:title, order: :descending, case_insensitive: true) .map(&:title) ! end ͸·ΓͲ͜Ζ
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23. %FMFUJPO def delete_objects m = Movie.first m.destroy Movie.destroy_all cdq.save # ͜͜ͰॳΊͯอଘ͞ΕΔ end
24. NJHSBUJPO schema "0002" do entity "Movie" do string :title has_many :characters, deletionRule: "Cascade" end entity "Character" do string :name belongs_to :movie end end 4DIFNB@BEE@DIBSBDUFSSC
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    class Character < CDQManagedObject ! end
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    $SFBUJPO def relation_create_objects m = Movie.new_hope.first m.characters.create name:"LUKE SKYWALKER" m.characters.create name:"OBI-WAN KENOBI" m.characters.create name:"DARTH VADER" cdq.save end
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    2VFSZ def relation_query_objects m = Movie.new_hope.first m.characters.where(:name).contains("LUKE").first end
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    %FMFUJPO def relation_delete_objects m = Movie.new_hope.first m.characters.where(:name).contains("OBI-WAN").first.destroy #m.characters.where(:name).contains(“DARTH").destroy_all # NG m.characters.where(:name).contains("DARTH").each{|c| c.destroy} cdq.save end
29. /4.BOBHFE0CKFDU$POUFYU w DERDPOUFYUTDVSSFOU def rollback_objects m = Movie.new_hope.first m.characters.create name: "Mr. Spock" context = cdq.contexts.current context.rollback end
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    5ISFBEJOH def background_insert m = Movie.new_hope.first parent = cdq.contexts.current Dispatch::Queue.concurrent.async do cdq.contexts.push(parent) cdq.contexts.new(NSPrivateQueueConcurrencyType) do context = cdq.contexts.current m1 = context.objectWithID(m.objectID) m1.characters.create name: "C-3PO" m1.characters.create name: "R2-D2" cdq.save Dispatch::Queue.main.sync { p Movie.new_hope.first.characters.map(&:name) } end end end
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    5ISFBEJOH m = Movie.new_hope.first parent = cdq.contexts.current # 1 Dispatch::Queue.concurrent.async do cdq.contexts.push(parent) # 2 cdq.contexts.new(NSPrivateQueueConcurrencyType) do # 3 context = cdq.contexts.current # 4 m1 = context.objectWithID(m.objectID) QBSFOU
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    5ISFBEؒΛ·͙ͨ৔߹͸PCKFDU*%Λ࢖͏ m = Movie.new_hope.first parent = cdq.contexts.current Dispatch::Queue.concurrent.async do cdq.contexts.push(parent) cdq.contexts.new(NSPrivateQueueConcurrencyType) do context = cdq.contexts.current m1 = context.objectWithID(m.objectID) # 5
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