TRUNK 0125 トレーニング

Ruby on Rails | 2時間でTwitterを作ろう

Transcript

2. ΞδΣϯμ
   ࣗݾ঺հͷϑΣʔζ Ruby ʹ͍ͭͯ Ruby on Rails ͱ͸ ࣮ࡍʹ΍ͬͯΈΑ͏ʂ
   ࠓ೔ͷΰʔϧ RoRΛ෼͔ͬͨؾʹͳΔ
   
3. ࣗݾ঺հ
   •  ཱڭେֶ̏೥ੜ •  TECH::CAMPͰϝϯλʔͯ͠·͢ɻ •  ΏΔεϙΛ࡞͍ͬͯΔɻ •  མޠͱ͔ɺөը͕޷͖
4. Ruby ͱ͸
   •  ೔ຊਓ͕࡞ͬͨϓϩάϥϛϯάݴޠ •  WebΞϓϦ։ൃ޲͖
   
5. Ruby ͱ͸
   •  ೔ຊਓ͕࡞ͬͨϓϩάϥϛϯάݴޠ •  WebΞϓϦ։ൃ޲͚
   ͦͷલʹ
   
6. ϓϩάϥϛϯάݴޠʁʁ
   
7. ϓϩάϥϛϯάݴޠʁʁ
   C, C++, Java, Go, python, HTML, CSS, JavaScript Ruby, PHP,
8. ϓϩάϥϛϯάݴޠͱ͸
   •  ίϯϐϡʔλʹ໋ྩΛग़ͨ͢Ίͷݴޠ •  ग़དྷΔ͜ͱ͸େମಉ͡ •  ໨త࣍ୈͰɺ޲͖ෆ޲͖͕͋Δ
9. Ruby ͱ͸
   •  ೔ຊਓ͕࡞ͬͨϓϩάϥϛϯάݴޠ •  WebΞϓϦ։ൃ޲͖
   
10. ϚʔΫΞοϓݴޠͷҧ͍ͱ ϓϩάϥϛϯάݴޠͷҧ͍
    
11. ϚʔΫΞοϓݴޠͷҧ͍ͱ ϓϩάϥϛϯάݴޠͷҧ͍
    ϚʔΫΞοϓݴޠ
    ˠจॻߏ଄ɺදݱ ϓϩάϥϛϯάݴޠ
    ˠσʔλͷ΍ΓऔΓ
12. Ruby on Rails ͱ͸
    v RubyͷwebΞϓϦ༻ϑϨʔϜϫʔΫ => webΞϓϦͷ࡞੒͕ൺֱతΧϯλϯ v Ҏલ͸1000ߦॻ͍͍ͯͨίʔυ͕ ɹɹɹɹ 100ߦͰՄೳʹͳΔɻ https://blog.codecamp.jp/what_is_rails
14. ᶃ ౤ߘ ᶄ දࣔ ᶅ ฤू ᶆ ࡟আ ɹɹɹɹΛ൐ͬͨWebΞϓϦͷ࡞੡ʂ
    Ruby on Rails Ͱग़དྷΔࣄ
    OOΛ౤ߘɺදࣔɺฤूɺ࡟আɻ ɹɹɹɹɹɹɹͱ͍͏͜ͱͳΒେମͰ͖Δɻ
    ߟ͑ͯΈΑ͏ʂ
    
15. Ruby on Rails ઃܭཧ೦
    •  CoC (convention over configuration) ɹ
    
    
    
    
    
    
    
    
    
    ໋໊نଇΛकΒͶ͹ͳΒͳ͍ɻ •  DRY ʢDon’t Repeat Yourselfʣ ಉ͡هड़Λ܁Γฦ͞ͳ͍ɺলΤωɻमਖ਼ָ͕ɻ •  RESTʢRepresentational State Transferʣ URLͱHTTPϝιουͷֻ͚ࢉɺRESTfulͰ͢ɻ
    
16. ࠓ೔͍͡Δ৔ॴ
    ᶃconfig/routes.rb :ΞΫηεͱॲཧ ᶄapp/controllers :viewͱσʔλΛ࿈݁ ᶅapp/views :ݟͨ໨ ᶆdb/migrate :σʔλϕʔεߏங ᶇapp/models :σʔλؔ࿈
17. •  ड͚औͬͨURL(ϦΫΤετ)ͱͦͷޙͷΞΫγϣϯΛܾఆ͢Δɻ Rails.application.routes.draw do get '/tweets’ => 'tweets#index’ end ˞ҙຯ /tweetsʹϦΫΤετΛड͚औͬͨΒɺ tweetsίϯτϩʔϥʔͷindexΞΫγϣϯʹड͚౉͢ɻ
    cofig/routes.rb
    ϧʔςΟϯά
    
18. •  ΞΫγϣϯͷఆٛ •  View΁ͷσʔλఆٛ App/conterollers/tweets_controller.rb class TweetsController < ApplicationController def index @tweets = Tweet.all end end ˞ҙຯ ɹ@tweets͸viewʹ౉͢σʔλͷശɺதʹ͸ = ͷӈଆ͕ೖ͍ͬͯΔɻ ɹTweet.allͰ͸ɺTweetςʔϒϧͷશͯͷσʔλΛॴಘ͍ͯ͠Δɻ Controller
    
19. •  ݟͨ໨୲౰ •  ίϯτϩʔϥʔ͔Βड͚औͬͨσʔλͷॲཧΛ͢Δ <% @tweets.each do |tweet| %> <%= tweet.text %> <% end %> ˞ҙຯ <%%>Ͱғ·Εͨ΋ͷ͸Rubyͷίʔυɻ @tweetsͰड͚औͬͨσʔλΛeachจͰల։ͯ͠ද͍ࣔͯ͠Δɻ
    app/views/index.html.erb
    View
    
20. •  σʔλϕʔεͷઃܭ ɹɹσʔλͷ໊લɺܗࣜɺ૊Έ߹ΘͤΛهड़͢Δ৔ॴ class CreateTweets < ActiveRecord::Migration[5.0] def change create_table :tweets do |t| t.string :text t.integer :user_id ɹend end end ˞ҙຯ ɹtweetςʔϒϧ͸stringܕtextΧϥϜͱ ɹɹɹɹɹɹɹɹ integerܕuser_idΧϥϜͰߏ੒͢Δɻ
    migration
    db/migrate/20170125110916_create_tweets.rb
    
21. σʔλͷߏ଄
    ໊લɹจࣈ(λϩ΢) ਎௕
    
    
    ਺஋(cm) ମॏ
    
    
    ਺஋(kg) ͭͿ΍͖
    จࣈ(τϨʔχϯάͳ͏) ɹɹɹɹɹstring
    
22. •  σʔλϕʔεͱͷௐ੔໾(ςʔϒϧΛ࢖͑ΔΑ͏ʹ͢Δ) •  ςʔϒϧಉ࢜ͷؔ܎ੑΛఆٛ(reration) •  σʔλͷ੍ݶ(validation) ˞ҙຯ tweetϞσϧ͸userϞσϧʹैଐ͍ͯ͠Δ text͸140จࣈҎ্ෆՄ class Tweet < ApplicationRecord belongs_to :user validates :text, length: { maximum: 140 } end
    app/models/tweet.rb
    Model
    
23. σʔλͷؔ܎ੑ
    ෳ਺
    ̍
    has_many :tweets
    belongs_to :user
    
24. σʔλͷ੍ݶ
    ໊લɹଟͯ͘΋10จࣈ ਎௕ 150 ~ 180cm·Ͱ ମॏ 35 ~ 90 kg·Ͱ ͭͿ΍͖
    140จࣈҎ಺
    
25. ࣮ࡍʹ΍ͬͯΈΑ͏ʂ
    
26. ᶃ ౤ߘ ᶄ දࣔ ᶅ ฤू ᶆ ࡟আ ɹɹɹɹΛ൐ͬͨWebΞϓϦͷ࡞੡ʂ
    Ruby on Rails Ͱग़དྷΔࣄ
    OOΛ౤ߘɺදࣔɺฤूɺ࡟আɻ ɹɹɹɹɹɹɹͱ͍͏͜ͱͳΒେମͰ͖Δɻ
    ࠶ͼ
    
27. Ruby on Rails ઃܭཧ೦
    •  CoC (convention over configuration) ɹ
    
    
    
    
    
    
    
    
    
    ໋໊نଇΛकΒͶ͹ͳΒͳ͍ɻ •  DRY ʢDon’t Repeat Yourselfʣ ಉ͡هड़Λ܁Γฦ͞ͳ͍ɺলΤωɻमਖ਼ָ͕ɻ •  RESTʢRepresentational State Transferʣ URLͱHTTPϝιουͷֻ͚ࢉɺRESTfulͰ͢ɻ
    ࠶ͼ
    
28. ͍͍ײ͡ͷࢿྉ
    •  http://blog.sumyapp.com/2013/07/no- recommend-rails/ •  http://www.rubylife.jp/rails/ini/ index7.html
    
29. Φεεϝͷษڧํ๏
    •  Progate •  TECH::CAMP