Kaminari

ページャNight <[1]> の発表 "ふつうのページャーをつくろう"の発表スライド http://www.zusaar.com/event/5477013

Transcript

2. begin
3. amatsuda/kaminari
4. ͜Ε͸Կʁ Ruby on RailsͰ ϖʔδωʔγϣϯ͢Δ΍ͭ
5. Ͱ͖Δ͜ͱ ☇DBΫΤϦ΁ͷϖʔδ൪߸ͱ 1ϖʔδ͋ͨΓ݅਺ʹΑΔ ৚݅௥Ճ ☇ϖʔδωʔγϣϯϦϯΫͷ ඳը
6. ྺ࢙ ☇1st commit: 2011/02/05 ☇1st release: 2011/02/05
7. Railsͷϖʔδϟʔͷมભ ☇Rails 1.x: ඪ४ఴ෇࣌୅ ☇ActionController::Pagination ☇Rails 2.x: ໺ྑϓϥάΠϯ࣌୅ ☇classic_pagination ☇will_paginate ☇paginating_ nd
8. AC::Pagination ☇Railsඪ४ఴ෇ (ͦΜͳ࣌୅΋ ͋Γ·ͨ͠Ͷ) ☇࢖͍ํ͕೉ͯ͘͠ͳ͔ͳ͔ ֮͑ΒΕͳ͍ ☇஗͍͜ͱͰఆධ
9. AC::Pagination
10. "Automatic pagination for every action in a controller" class PersonController < ApplicationController model :person paginate :people, :order => 'last_name, rst_name', :per_page => 20 # ... end
11. AC::Pagination ☇φκͷએݴతDSL
12. "Pagination for a single action" def list @person_pages, @people = paginate :people, :order => 'last_name, rst_name' end
13. AC::Pagination ☇ϦϯΫඳը༻ͷΦϒδΣΫτ ͱݕࡧ݁Ռͷ഑ྻͷ2ͭͷΦϒ δΣΫτΛฦ͢API
14. AC::Paginationͷઃܭࢥ૝ ☇ϖʔδωʔγϣϯ͸ ίϯτϩʔϥʔͷ੹຿Ͱ͋Δ
15. will_paginateͷొ৔ “I WILL PAGINATE” http://errtheblog.com/posts/47- i-will-paginate
16. will_paginate ☇PJ & defunkt
17. PHPͷΠέͯΔ΍͔ͭΒύΫͬͨ ☇"Rails pagination code is really bad" ☇"stealing some PHP code" ☇"I nd Digg-style Pagination" ☇"you take 120 lines of PHP and slim it down to around 40 in Ruby"
18. will_paginateͷઃܭࢥ૝ ϖʔδωʔγϣϯ͸ ίϯτϩʔϥʔ͚ͩͷ੹຿ Ͱ͸ͳ͍ͷͰ͸ʁ
19. ࠷ॳظͷREADMEΑΓ Quick quiz: Where does pagination logic belong? a) in the model; b) in the controller; c) in views; d) all of the above.
20. ARϞσϧʹpaginateϝιου @posts = Post.paginate :page => params[:page], :per_page => 50
21. ϏϡʔͰ͸͜ͷݕࡧ݁ՌΦϒδΣΫτ ͕ϦϯΫͷඳըʹ࢖ΘΕΔ <%= will_paginate @posts %>
22. will_paginateͷ࢖͍উख ݕࡧ͸ϞσϧͰɺσʔλͷड͚ ౉͠͸1ݸͷΦϒδΣΫτͰɺ ϦϯΫͷඳը͸Ϗϡʔͷ ϔϧύʔϝιουͰɺͱ੹຿Λ ෼͚ͨ͜ͱʹΑΓɺγϯϓϧͳ APIΛ࣮ݱ
23. will_paginateͷઃܭࢥ૝ ϖʔδωʔγϣϯ͸ M, V, CͷશͯʹؔΘΔ
24. will_paginateͷ࢖͍উख (2) φϏήʔγϣϯϦϯΫ͸Ruby Ͱॻ͔Εͨϔϧύʔϝιουͷ தͰจࣈྻΛ૊ཱͯͯΔͷͰɺ ඇৗʹΧελϚΠζ͕͠ʹ͘ ͍ɺͱ͍͏͔Ͱ͖ͳ͍
25. Railsͷϖʔδϟʔͷมભ ☇Rails 1.x: ඪ४ఴ෇࣌୅ ☇Rails 2.x: ໺ྑϓϥάΠϯ࣌୅ ☇Rails 3.0: Railsͷେվ଄ ☇Կ΋͔΋ಈ͔ͳ͘ͳͬͨ…
26. Rails 3.0࣌୅ ☇ Ralis 2.3 -> 3.0ͷϝδϟʔόʔδϣϯ ΞοϓͰRailsͷ಺෦ߏ଄͕େ͖͘มԽ ☇ Rails 2࣌୅ͷϓϥάΠϯ͕͍Ζ͍Ζࢮ๢ ☇ ۀ຿Ͱ։ൃ͍ͯͨ͠Rails 3.0ͷΞϓϦͰ ಈ࡞͢ΔϖʔδωʔγϣϯϥΠϒϥϦ͕ ͳ͔ͬͨ ☇ …ͷͰ͔ͨ͠ͳࣗ͘෼Ͱ࡞ͬͨ
27. ͳͥRails 2Ͱ࢖ͬͯͨطଘϥΠϒϥϦ ΁ͷύονʹ͠ͳ͔ͬͨͷ͔ʁ ☇๭will_p͕Ϋιίʔυ͗ͯ͢͜Ε ͍ͫΔͷϚδແཧͬͯࢥͬͨ ☇Rails 3ͷ৽ػೳͨͪΛ࢖ͬͨ ৽͍͠ΠσΟΦϜΛࢥ͍͍ͭͯ ͠·ͬͨ
28. Rails 3࣌୅ͷΠσΟΦϜ ☇RelationΛ͏·͘࢖͏ ☇Engineʹด͡ࠐΊΔ
29. ࠷ॳظ࣮૷ ☇https://github.com/amatsuda/ kaminari/tree/v0.1.0
30. Ϟσϧଆͷ࣮૷
31. kaminari/active_record.rb (ൈਮ) kls.class_eval do scope :page, lambda {|num| offset(PER_PAGE * ([num.to_i, 1].max - 1)).limit(PER_PAGE) } do def per(num) offset(offset_value / limit_value * num).limit(num) end def num_pages (except(:offset, :limit).count.to_f / limit_value).ceil end def current_page (offset_value / limit_value) + 1 ennnnnnnd
32. Ϟσϧଆͷػೳ ☇ ARͷϞσϧͦΕͧΕʹରͯ͠page ͱ͍͏໊લͷscopeΛఆٛ ☇ pageͰ͸limitͱoffsetͷ஋Λࢉग़ͯ͠ ΫΤϦΛ૊ΈཱͯΔ ☇ page͸perͱ͔current_pageͱ͔ͷϝ ιου͕ੜ͑ͨ݁ՌΦϒδΣΫτΛฦ͢
33. ͜ΜͳAPI
34. ϖʔδ൪߸ʹΑΔߜΓࠐΈ User.page(7)
35. 1ϖʔδ͋ͨΓͷ݅਺ͷࢦఆ User.page(7).per(50)
36. ϖʔδωʔγϣϯϦϯΫͷඳը
37. ඞཁͳ৘ใ ☇૯݅਺ ☇1ϖʔδ͋ͨΓͷ݅਺ ☇ݱࡏͷϖʔδ൪߸
38. ಋग़Ͱ͖Δ৘ใ ☇૯ϖʔδ਺ ☇࠷ॳͷϖʔδ ☇࠷ޙͷϖʔδ ☇લͷϖʔδ ☇࣍ͷϖʔδ
39. Ϗϡʔଆͷ࣮૷ ☇Rails Enginesͷ࢓૊ΈΛར༻
40. Rails Engines ☇Rails 3Ͱಋೖ͞Εͨ৽ػೳ ☇Ϟσϧͱ͔ίϯτϩʔϥʔͱ͔ Ϗϡʔͱ͔con gͱ͔ΛؚΉ͜ͱ ͕Ͱ͖ΔϛχRailsΞϓϦΈ͍ͨ ͳ΋ͷΛ਌ΞϓϦʹόϯυϧ ͢Δ࢓૊Έ
41. Ϗϡʔଆͷ࣮૷ % ls app/views/kaminari _current_page.html.erb _ rst_page_link.html.erb _last_page_link.html.erb _next_link.html.erb _next_span.html.erb _page_link.html.erb _prev_link.html.erb _prev_span.html.erb _truncated_span.html.erb
42. Ϗϡʔଆͷ࣮૷ ☇ ଟ਺ͷpartialςϯϓϨʔτʹখ෼͚ ͞ΕͨERB (Ruby͕ຒΊࠐΊΔHTML ςϯϓϨʔτ) ☇ ϦϯΫΛΧελϚΠζ͍ͨ͠৔߹͸ partialΛॻ͖׵͑Ε͹ྑ͍ ☇ ैདྷͷϥΠϒϥϦͰෆຬͩͬͨϏϡʔͷ ΧελϚΠζੑͷѱ͞Λվྑͯ͠Έͨ
43. ϦϯΫ ☇ ࣍ͷϖʔδɺલͷϖʔδɺ࠷ॳͷϖʔ δɺ࠷ޙͷϖʔδɺ͋ͱϖʔδ൪߸ͷ ਺ࣈ ☇ ભҠઌͷϖʔδ൪߸ΛΫΤϦύϥϝʔ λʔʹ෇Ճͭͭ͠GETͰݱࡏϖʔδʹ ભҠ ☇ AjaxରԠ
44. Dave Thomasʹ๙ΊΒΕͨʂ
45. the admin side of our store our store == pragprog.com? (!!!)
46. ͦͷଞͷಛ௃ ☇ArrayͳͲΛԚછ͠ͳ͍ ☇ແઃఆͰ࢖͑Δ ☇Agnostic
47. Agnosticͱ͸ ☇Rails 3+ͷಛ௃ ☇Framework agnosticɹ ☇͍ΖΜͳϥΠϒϥϦͱ͔ʹ ରԠͯ͠ΔΑ͍ͬͯ͏͜ͱ ☇Kaminariʹ΋Өڹ
48. ͍ΖΜͳϥΠϒϥϦʹରԠ ☇DataMapperͱ͔Mongoͱ͔ Sinatraͱ͔࢖ͬͯΔਓ͔Β ͍Ζ͍Ζ΀ΔΓ͕དྷΔ ☇ΦϨAR͔͠࢖ͬͯͳ͍Μ ͚ͩͲ…
49. Agnostic ☇Α͘Θ͔Μͳ͍͚Ͳɺಈ͍ͯͦ͏ ͩͬͨΒདྷͨ΋ͷ͸શͯऔΓࠐΜͰ Έͨ ☇࢓༷ͷංେԽ ☇=> ϝϯςͭΒ͍… ☇=> CIʹ͍͔͔ͬ࣌ؒ͢͝Δ
50. ݱࡏ࣮ߦ͞Ε͍ͯΔCI ☇Ruby 1.8.7, 1.9.3, 2.0.0, 2.1, ruby- head, jruby, rbx-2 ☇ActiveRecord 30, 31, 32, 40, 41, edge, DataMapper 12, MongoMapper, Mongoid 24, 30, 31, 40 ☇Rails֤όʔδϣϯ, Sinatra 13, 14
51. ݱࡏ࣮ߦ͞Ε͍ͯΔCI …ͷϚτϦοΫε
52. Sinatraͱ͔શ͘࢖ͬͯͳ͍͔ ΒͲ͏Ͱ΋͍͍Μ͚ͩͲ…
53. Sinatraͱ͔શ͘࢖ͬͯͳ͍͔ΒͲ͏Ͱ ΋͍͍Μ͚ͩͲ… Sinatraαϙʔτͯͯ͠ Α͔ͬͨ͜ͱ
56. ͜Ε͔Β ☇Sinatraͱ͔DataMapperͱ͔ mongoͳΜͱ͔ͱ͔ͷΞμϓ λʔΛผϥΠϒϥϦʹ෼཭ ☇όʔδϣϯ൪߸Λ1.0ʹ͢Δ ☇Coming soon!
57. end