validationについて - Speaker Deck

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WBMJEBUJPOʹ͍ͭͯ

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ࣗݾ঺հ w גࣜձࣾϢχίϯ w 5XJUUFS!SZPOFYU w ήʔϚʔ w ΋Μ͸Μͱ͔εϓϥτΡʔϯͱ͔ w ;ͩΜ͸3BJMT΍ͬͯ·͢

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࠷ۙͷਐḿͰ͢ w ࠓճ͸ΏͬͨΓ΍ͬͯΔͷͰ·ͩ)3Ͱ͢ w ΤϯδχΞϞϯϋϯ4MBDL্ཱͪ͛ͯΔͷͰڵຯ͋Δํ͓ ੠͕͚͍ͩ͘͞

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ษڧձʗίϛϡχςΟ w 4IJCVZBSC w :PLPIBNBSC w ,BXBTBLJSC w ͋ͨΓʹࢀՃͯ͠·͢ɻ

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ձࣾͰ΍͍ͬͯΔ͜ͱ ւ֎޲͚ήʔϜΩϡʔϨγϣϯαʔϏεͷ 3PDL6.FEJBDSBGU IUUQTNFEJBDSBGUSPDLVBQQTDPN ΍ ւ֎޲͚ήʔϜϑΥʔϥϜͷ 3PDL65BML IUUQTUBMLSPDLVBQQTDPN ͷ։ൃΛ΍͍ͬͯ·͢ɻ

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ࠓ೔࿩͢͜ͱ w γεςϜͷͨΊͷWBMJEBUJPOʹ͍ͭͯ w 3BJMTͰWBMJEBUJPO͢Δ࿩ w %#Ͱ੍໿Λ͔͚Δ࿩ w 69ͷͨΊͷWBMJEBUJPOʹ͍ͭͯ w +4ͰWBMJEBUJPO͢Δ࿩

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ίʔυʹ͍ͭͯ w ίʔυ͸ීஈࢲ͕ۀ຿Ͱ࢖͍ͬͯΔ3BJMTͰͷ࣮ ૷ྫʹͳΓ·͕͢ɺ8FCϑϨʔϜϫʔΫશൠʹ ͍ͭͯಉ͜͡ͱ͕ݴ͑ΔΜ͡Όͳ͍͔ͳ͊ͱࢥ ͍·͢

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WBMJEBUJPO͠·͠ΐ͏

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Ϣʔβ໊ͷཁ݅͸͜ΕͰ w ௕͞จࣈ·Ͱ w ඞਢ

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3BJMTͩͱ class User < ActiveRecord::Base validates :name, length: { maximum: 20 }, presence: true end

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͜͏ͳΔ

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؆୯ʂ

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ͱ͜Ζ͕

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3BJMTͷWBMJEBUJPO͸ΞϓϦϨΠϠʔͰ ݕূՄೳͳϝιουͷ৔߹ʹͷΈ ݕূ͢Δ͚ͩͳͷͰ

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௚઀Ϩίʔυʹ*OTFSU w */4&35JOUPVTFSTTFUOBNF B@OBNF@UIBU@JT@PWFS@UIBO@@DIBSBDUFST

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WBMJEBUJPO͕૸Βͳ͍ϝιου Λ࢖͏ VTFSVQEBUF@DPMVNO OBNF MPOH@OBNF@UIBU@PWFS@UIBO@UXFOUZ@DIBSBDUFST VTFSTBWF WBMJEBUFGBMTF

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ͷΑ͏ͳૢ࡞Ͱɺ؆୯ʹ WBMJEBUJPOҧ൓ͷσʔλ͕࡞ΕΔ

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ͦͯ͜͠ΕΛը໘͔Β ૢ࡞͠Α͏ͱ͢Δͱ w ࠓճͷૢ࡞Ͱ໊લΛมߋ͍ͯ͠ͳ͍ʹ΋͔͔Θ Βͣɺ໊લͰΤϥʔʹͳΔ มߋͨ͠ͷ͸͜͜

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͞Βʹ

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ύεϫʔυมߋը໘ w ଞͷઃఆը໘ͱ͸੾Γग़ͯ͠ɺύεϫʔυ͚ͩ Λมߋ͢Δը໘ͱ͍͏ͭ͘Γ͸Α͋͘Δͱࢥ͍ ·͢

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ύεϫʔυΛมߋ͢Δը໘ͳͷʹɺ ໊લ͕௕ͯ͘ΤϥʔͱݴΘΕΔ w ΋ͪΖΜɺ͜ͷը໘Ͱ໊લΛม͑Δ͜ͱ͸Ͱ͖ͳ͍ w Ϣʔβ͸Ͳ͏͠Α͏΋ͳ͍

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͕ͨͬͯ͠ w 8FCΞϓϦϨΠϠʔͰͷ੍໿͚ͩͰ͸ͳ͘ɺ͖ͬ ͪΓͱ%#Ͱͷ੍໿ΛೖΕ·͠ΐ͏

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class CreateUsers < ActiveRecord::Migration def change create_table :users do |t| t.string :name, limit: 20, null: false t.string :password t.timestamps null: false end end end %#ʹMJNJUͱOPUOVMM੍໿Λֻ͚ Δʢ3BJMTͷNJHSBUJPOͰ΍Δྫʣ

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Μɺ͡Ό͋%#ͷ੍໿͚ͩష͓͚ͬͯ͹ɺ 3BJMTͷWBMJEBUJPOཁΒͳ͍Μ͡ΌͶʁ

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ͱ͍͏Θ͚Ͱ΍ͬͯΈΔͱ

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WBMJEBUJPOΤϥʔ͕ฦ͍ͬͯͨ ՕॴͰΤϥʔʹ

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͡Ό͋͜ͷ%#ͷΤϥʔΛྫ֎DBUDIͯ͠ɺ ద੾ͳΤϥʔϝοηʔδΛฦ͢Α͏ʹ ͯ͠΍Ε͹ɾɾɾ

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ͦΕɺ3BJMTͷWBMJEBUJPOͷ ํָ͕͡ΌͶ

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ͱ͍͏Θ͚Ͱ w %#ͷ੍໿͸γεςϜΛकΔͨΊʹઈରʹֻ͚· ͠ΐ͏ɻ͕͜͜ΞϓϦϨΠϠʔͰͷWBMJEBUJPOΑ ΓΏΔ͍ͱ͍͏͜ͱ͕͋ͬͯ͸͍͚ͳ͍ɻ w ΞϓϦϨΠϠʔͰ΋ɺແବͳΫΤϦൃߦΛ͠ͳ ͍ʗΤϥʔॲཧΛద੾ʹ͢ΔͨΊʹWBMJEBUJPOΛ ΍Δ͜ͱΛڧ͘ਪ঑͠·͢ɻ

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ΊͰͨ͠ΊͰͨ͠

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Ͱ͸ͳ͍ʂ

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͜͜·Ͱ w γεςϜͷͨΊͷWBMJEBUJPOͷ࿩

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͔͜͜Β w 69ͷͨΊͷWBMJEBUJPOͷ࿩

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69ͷͨΊͷWBMJEBUJPOͱ͸ʁ w Α͋͘ΔϢʔβొ࿥ϑΥʔϜ

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Ϣʔβ*%ΛೖΕͯΈΔ w ొ࿥ϘλϯΛԡ͢ͱ͢Ͱʹ࢖ΘΕ͍ͯ·͢ɺͱΤ ϥʔ͕ฦͬͯ͘Δ

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ผͷ*%Λࢼ͢ w ·ౖͨΒΕΔ

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͞Βʹผͷ*%Λࢼ͢ w ·ͨ·ͨΤϥʔʹͳΔ

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Ϣʔβʔ͸ౖͬͯ ཭୤ͯ͠͠·͏

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Ͳ͏͢Ε͹͍͍ͷ͔ʁ w ೖྗ͢ΔϘλϯԡ͢Τϥʔ͕ฦͬͯ͘ Δɺͱ͍͏Ұ࿈ͷྲྀΕΛ܁Γฦ͢ͷ͸ۤ௧ w ೖྗͨ࣌͠఺Ͱɺͦͷೖྗ͕ड͚ೖΕՄೳ͔Ͳ ͏͔ΛΘ͔ΔΑ͏ʹ͢Δ΂͖

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Ϣʔβ͕ೖྗΛऴ͑ͨλΠϛϯάͰϑΟʔυόοΫ μϝͳ৔߹͸ͦ΋ͦ΋ԡͤͳ͘͢Δ

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੒ޭ͢Δ৔߹΋ڭ͑ͯ͋͛Δ

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w %#Ͱ๷͙ͷ͸γεςϜͷͨΊͷWBMJEBUJPO w Ϣʔβʹշదʹೖྗͯ͠΋Β͏ͨΊͷɺ69ͷͨ ΊͷWBMJEBUJPO͕ඞཁ

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Ͳ͏࣮ݱ͢Δ͔ʁ w ઌఔͷྫ͸ɺ%#಺ͰͷॏෳνΣοΫ͕ඞཁͳͷ Ͱ+BWBTDSJQU"1*ͷ࿈ܞ͕ඞཁͳέʔεɻ ͪΐͬͱ΍΍͍͜͠ͷͰ͋ͱͰɻ w ·ͣ͸ɺ'PSN͚ͩͰ൑அͰ͖Δɺʮඞਢೖྗʯ ʮ௕੍͞ݶʯʮϑΥʔϚοτνΣοΫʯʹ͍ͭ ͯ࿩͠·͢ɻ

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'PSNͰ൑அ͢ΔWBMJEBUJPO w ྫ͑͹ɺ)5.-ʹ͸SFRVJSFEଐੑ΍FNBJMଐੑ ͳͲ͕͋Δ w ೖྗඞਢ߲໨ʹೖྗ͍ͯ͠ͳ͔ͬͨΓɺࢦఆͷ ϑΥʔϚοτʹͳ͍ͬͯͳ͔ͬͨΒϒϥ΢βϨ ϕϧͰΤϥʔΛฦͯ͘͠ΕΔ w ·͋ศར

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ͱ͜Ζ͕ w ಈ͔ͳ͍ϒϥ΢β͕

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w ΋͋Δ͚Ͳɺͦ͏͍͏Ϩϕϧͷ࿩Ͱ͸ͳ͘ w *&͸ࢮΜͩʂ΋͏͍ͳ͍ʂ ΍͋

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4BGBSJ w ಈ͔ͳ͍ w ࠷৽ͷ.BD04 J04Ͱಈ͔ͳ͍ w ͜ΕͰಈ͔ͳ͍Ҏ্ɺීٴ཰Λߟ͑ΔͱཔΕͳ ͍ͱߟ͑Δ΂͖

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+BWBTDSJQUͰ΍Δ w K2VFSZͳΒ͍͔ͭ͘ϓϥάΠϯ͕͋Δ w 7VF 3FBDU "OHVMBS౳ͷϑϨʔϜϫʔΫΛ࢖༻ ͍ͯ͠ΔͳΒɺͦ͜Ͱͷྲّྀʹै͏ͱ࣮૷ָ͕ ͳ͸ͣ

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௨৴͕ඞཁͳ΍ͭ͸ɺ ೖྗͷλΠϛϯάͰ௨৴ͯ݁͠ՌΛग़ͯ͠΍Δ

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͜͏͍͏Πϝʔδ 'PSN Ϣʔβ +BWBTDSJQU "1* %# ೖྗ มߋΛݕ஌ ೖྗ಺༰ΛૹΔ %#ʹ໰͍߹Θͤ 0,/( 0,/( 0,ʗ/(

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+4͔ΒݺͿ ʢલεϥΠυ ͷεςοϓ 4 $ -> 5 $("#username").keyup(-> 6 $.get( 7 "/accounts/exists", 8 { username: $('#username').val() }, 9 (data) -> 10 if data.result 11 $("#account-result").html("

͜ͷϢʔβ໊͸࢖ΘΕ͍ͯ·͢

") 12 $("#submit-button").prop("disabled", true) 13 else 14 $("#account-result").html("

͜ͷϢʔβ໊͸࢖༻ՄೳͰ͢

") 15 $("#submit-button").prop("disabled", false) 16 ) 17 ) 18 w $P⒎FF4DSJQUͰ͢ w ࣮ࡍʹLFZVQͰ΍Δͱ௨৴ස౓ଟ͗͢ΔͷͰEFCPVDF͢ΔQMVHJOͳͲ࢖͍·͠ΐ͏ w ྫ͸K2VFSZͰ͕͢ɺԿΒ͔ͷϑϨʔϜϫʔΫΛ࢖͏ͷ΋ΦεεϝͰ͢

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֬ೝ༻"1*࡞Δ ʢdͷεςοϓ Rails.application.routes.draw do resources :accounts do collection do get "exists", to: "accounts#exist" end end end class AccountsController < ApplicationController def exist if Account.exists?(username: params[:username]) render json: { result: true }.to_json else render json: { result: false }.to_json end end end

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͜͜Ͱ w +4ͷWBMJEBUJPO͚ͩ΍͓͚ͬͯ͹ɺ%#ͷ੍໿ཁ Βͳ͍Μ͡Όͳ͍ʁ

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Μͳͨ͜ʔͳ͍ w +4͸ඇରԠϒϥ΢βʗΦϑʹ͢Δʗ௚઀1045 ͷ63-Λୟ͘౳ɺճආ༨༟

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w +4ͱ%#͚ͩ΍͓͚ͬͯ͹3BJMTͷ΍ͭ͸͍Βͳ ͍Μ͡Όͳ͍ʁ

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͋·ΓΑ͘ͳ͍ w +4ճආ͢ΔΑ͏ͳΞΫηεʹରͯ͠ɺ3BJMTͰద ੾ͳWBMJEBUJPOͰΤϥʔϝοηʔδΛฦͯ͠΍Δ ඞཁͳ͍·͋Θ͔Δ w %#ʹରͯ͠ແବͳ௨৴ʗΫΤϦ͕ൃߦ͞ΕΔՄ ೳੑ͕͋ΔΑ͘ͳ͍

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͞Βʹ w "1*Խ΋͢ΔͷͰ͋Ε͹ɺ3BJMTͷNPEFMʹΑΔ WBMJEBUJPO͕๷͙ՕॴͱͳΔ w େͨ͠खؒͰ͸ͳ͍ͷͰɺNPEFMͰͷWBMJEBUJPO ΋΍͓ͬͯ͘΄͏͕ྑ͍ɻ

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8FCΞϓϦͰ͸ͳ͘εϚϗͷ ৔߹͸ʁ w "1*αʔόཱͯͯɺεϚϗ͔Β"1*Λୟ͘΍ͭ

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69ͷͨΊͷWBMJEBUJPO͸ ΫϥΠΞϯτଆͰ w +4ͷ࣌ͱಉ͡Α͏ʹɺۃྗແବͳ௨৴Λൃੜ͞ ͤͣʹɺϢʔβͷೖྗʹରͯ͠ૉૣ͘ϑΟʔυόο ΫΛฦ͢

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αʔόଆ w %#ଆ͸ݴ͏·Ͱ΋ͳ͘ඞཁ w ΫϥΠΞϯτ͕όά͍ͬͯΔՄೳੑ΋͋ΔͷͰɺ 8FCΞϓϦͷNPEFM૚ͰͷWBMJEBUJPO΋ඞཁɻ

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·ͱΊ w ࠷ޙඌ %# Ͱෆਖ਼ͳ஋͸ઈର๷ޚ͢Δγες ϜͷͨΊͷWBMJEBUJPO w ࠷લྻ +4 ΫϥΠΞϯτΞϓϦ Ͱਖ਼ৗೖྗͷͨ ΊͷಋઢΛ࡞ͬͯ͋͛Δ69ͷͨΊͷ WBMJEBUJPO

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͝੩ௌ͋Γ͕ͱ͏ ͍͟͝·ͨ͠