Exploring the Power of Turbo Streams & Action Cable

Exploring the Power of Turbo Streams & Action Cable | RailsConf2023

by Kevin Liebholz

Slide 1

Slide 1 text

&YQMPSJOHUIF1PXFSPG5VSCP 4USFBNT"DUJPO$BCMF

Slide 2

Slide 2 text

No content

Slide 3

Slide 3 text

No content

Slide 4

Slide 4 text

"MBHBËTJB

Slide 5

Slide 5 text

No content

Slide 6

Slide 6 text

No content

Slide 7

Slide 7 text

No content

Slide 8

Slide 8 text

No content

Slide 9

Slide 9 text

No content

Slide 10

Slide 10 text

No content

Slide 11

Slide 11 text

3VCZPO3BJMT

Slide 12

Slide 12 text

3VCZPO3BJMT "DUJPO$BCMF

Slide 13

Slide 13 text

3VCZPO3BJMT "DUJPO$BCMF 5VSCP4USFBNT

Slide 14

Slide 14 text

No content

Slide 15

Slide 15 text

5JD

Slide 16

Slide 16 text

5JD 5BD

Slide 17

Slide 17 text

5JD 5BD 5PF

Slide 18

Slide 18 text

&YQMPSJOHUIF1PXFSPG5VSCP 4USFBNT"DUJPO$BCMF

Slide 19

Slide 19 text

8IPBN*

Slide 20

Slide 20 text

,FWJO-JFCIPM[

Slide 21

Slide 21 text

,FWJO-JFCIPM[ 4PGUXBSF&OHJOFFS!

Slide 22

Slide 22 text

,FWJO-JFCIPM[ 4PGUXBSF&OHJOFFS!

Slide 23

Slide 23 text

,FWJO-JFCIPM[ 'JSTUUBML😱

Slide 24

Slide 24 text

The Inheritance Cycle by Christopher Paolini

Slide 25

Slide 25 text

5VSCP4USFBNT "DUJPO$BCMF

Slide 26

Slide 26 text

5VSCP4USFBNT "DUJPO$BCMF .JTTJOHFYBNQMFT

Slide 27

Slide 27 text

5VSCP4USFBNT "DUJPO$BCMF .JTTJOHFYBNQMFT 4QBSLJOH*NBHJOBUJPO

Slide 28

Slide 28 text

No content

Slide 29

Slide 29 text

*OHSFEJFOUT &YQMPSJOHUIF 5IFPSZ

Slide 30

Slide 30 text

$POTUSVDUJPO #VJMEJOHUIF (BNF *OHSFEJFOUT &YQMPSJOHUIF 5IFPSZ

Slide 31

Slide 31 text

*OHSFEJFOUT &YQMPSJOHUIF 5IFPSZ 4QFMM 8BUDIJOHUIF&QJD (BNF $POTUSVDUJPO #VJMEJOHUIF (BNF

Slide 32

Slide 32 text

*OHSFEJFOUT &YQMPSJOHUIF5IFPSZ

Slide 33

Slide 33 text

8FC4PDLFUT

Slide 34

Slide 34 text

SFBMUJNF 8FC4PDLFUT

Slide 35

Slide 35 text

DMJFOU VT TFSWFS IFBERVBSUFS 8FC4PDLFUT

Slide 36

Slide 36 text

DMJFOU VT TFSWFS IFBERVBSUFS 8FC4PDLFUT

Slide 37

Slide 37 text

DMJFOU VT TFSWFS IFBERVBSUFS DMJFOU TDPVU 8FC4PDLFUT

Slide 38

Slide 38 text

DMJFOU VT TFSWFS IFBERVBSUFS DMJFOU TDPVU 8FC4PDLFUT

Slide 39

Slide 39 text

TFSWFS IFBERVBSUFS DMJFOU VT 8FC4PDLFUT

Slide 40

Slide 40 text

TFSWFS IFBERVBSUFS DMJFOU VT DMJFOU TDPVU 8FC4PDLFUT

Slide 41

Slide 41 text

"DUJPO$BCMF

Slide 42

Slide 42 text

"DUJPO$BCMFTFBNMFTTMZ JOUFHSBUFT 8FC4PDLFUT XJUIUIFSFTU PGZPVS3BJMTBQQMJDBUJPO*UBMMPXT GPSSFBMUJNFGFBUVSFTUPCFXSJUUFO JO3VCZJOUIFTBNFTUZMFBOEGPSN BTUIFSFTUPGZPVS3BJMTBQQMJDBUJPO XIJMFTUJMMCFJOHQFSGPSNBOUBOE TDBMBCMF*UTBGVMMTUBDLPGGFSJOH UIBUQSPWJEFTCPUIBDMJFOUTJEF +BWB4DSJQUGSBNFXPSLBOEBTFSWFS TJEF3VCZGSBNFXPSL:PVIBWF BDDFTTUPZPVSFOUJSFEPNBJONPEFM XSJUUFOXJUI"DUJWF3FDPSEPSZPVS 03.PGDIPJDF

Slide 43

Slide 43 text

Slide 44

Slide 44 text

Slide 45

Slide 45 text

"DUJPO$BCMFTFBNMFTTMZ JOUFHSBUFT 8FC4PDLFUT XJUIUIFSFTU PGZPVS3BJMTBQQMJDBUJPO*UBMMPXT GPSSFBMUJNFGFBUVSFTUPCFXSJUUFO JO3VCZJOUIFTBNFTUZMFBOEGPSN BTUIFSFTUPGZPVS3BJMTBQQMJDBUJPO XIJMFTUJMMCFJOHQFSGPSNBOUBOE TDBMBCMF*UTBGVMMTUBDLPGGFSJOH UIBUQSPWJEFTCPUIBDMJFOUTJEF +BWB4DSJQUGSBNFXPSLBOEB TFSWFS TJEF3VCZGSBNFXPSL:PVIBWF BDDFTTUPZPVSFOUJSFEPNBJONPEFM XSJUUFOXJUI"DUJWF3FDPSEPSZPVS 03.PGDIPJDF

Slide 46

Slide 46 text

5VSCP4USFBNT #SPBEDBTUJOH

Slide 47

Slide 47 text

5VSCP4USFBNT #SPBEDBTUJOH

Slide 48

Slide 48 text

5VSCP4USFBNT #SPBEDBTUJOH BCTUSBDUUIFBCTUSBDUJPO

Slide 49

Slide 49 text

5VSCP4USFBNT #SPBEDBTUJOH # app/models/concerns/turbo/broadcastable.rb module Turbo::Broadcastable extend ActiveSupport::Concern module ClassMethods def broadcast_remove_to # arguments # code end def broadcast_update_to # arguments # code end # even more methods end end UVSCPSBJMTHFN

Slide 50

Slide 50 text

5VSCP4USFBNT #SPBEDBTUJOH UVSCPSBJMTHFN # lib/turbo/engine.rb initializer "turbo.broadcastable" do ActiveSupport.on_load(:active_record) do include Turbo::Broadcastable end end

Slide 51

Slide 51 text

QMVHQMBZ

Slide 52

Slide 52 text

QMVHQMBZ FBTZUPVTF

Slide 53

Slide 53 text

QMVHQMBZ FBTZUPVTF BVUPNBUJD%0.VQEBUFT

Slide 54

Slide 54 text

No content

Slide 55

Slide 55 text

$POTUSVDUJPO #VJMEJOHUIF(BNF

Slide 56

Slide 56 text

UJDUBDUPF

Slide 57

Slide 57 text

UJDUBDUPF

Slide 58

Slide 58 text

UJDUBDUPF

Slide 59

Slide 59 text

UJDUBDUPF

Slide 60

Slide 60 text

UJDUBDUPF

Slide 61

Slide 61 text

UJDUBDUPF

Slide 62

Slide 62 text

UJDUBDUPF

Slide 63

Slide 63 text

HBNF TLFMFUPO

Slide 64

Slide 64 text

HBNF TLFMFUPO

Slide 65

Slide 65 text

HBNF TLFMFUPO # @name, @character class Player < ApplicationRecord CHARACTERS = %w[dragon sword].freeze belongs_to :game before_create :assign_character # more code end

Slide 66

Slide 66 text

HBNF TLFMFUPO # @field1, @field2, …, @field9 class Game < ApplicationRecord has_many :players end

Slide 67

Slide 67 text

DPOTUSBJOU

Slide 68

Slide 68 text

DMJFOUTJOWPMWFE

Slide 69

Slide 69 text

FGGFDUPGBDUJPO

Slide 70

Slide 70 text

6*EJGGFSFODFT

Slide 71

Slide 71 text

QMBZFST BDUJPOPGPQQPOFOU DPOTUSBJOU

Slide 72

Slide 72 text

DPOTUSBJOU

Slide 73

Slide 73 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU DPOTUSBJOU

Slide 74

Slide 74 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # games/show.html.erb <%= turbo_stream_from @player, "board" %> DPOTUSBJOU

Slide 75

Slide 75 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # games/show.html.erb <%= turbo_stream_from @player, "board" %> DPOTUSBJOU

Slide 76

Slide 76 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # games/show.html.erb <%= turbo_stream_from @player, "board" %> DPOTUSBJOU

Slide 77

Slide 77 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU DPOTUSBJOU

Slide 78

Slide 78 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # models/player.rb after_create :notify_opponent private def notify_opponent # code end DPOTUSBJOU

Slide 79

Slide 79 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # models/player.rb after_create :notify_opponent private def notify_opponent broadcast_update_to [opponent, 'board’], # more to come end DPOTUSBJOU

Slide 80

Slide 80 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # models/player.rb after_create :notify_opponent private def notify_opponent broadcast_update_to [opponent, 'board’], # more code end # games/show.html.erb <%= turbo_stream_from @player, "board" %> DPOTUSBJOU

Slide 81

Slide 81 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # models/player.rb after_create :notify_opponent private def notify_opponent broadcast_update_to [opponent, 'board’], target: 'board’, # more code end DPOTUSBJOU

Slide 82

Slide 82 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU DPOTUSBJOU

Slide 83

Slide 83 text

Slide 84

Slide 84 text

Slide 85

Slide 85 text

Slide 86

Slide 86 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU DPOTUSBJOU

Slide 87

Slide 87 text

DPOOFDUTUSFBN OPUJGZPQQPOFOU # models/player.rb after_create :notify_opponent private def notify_opponent broadcast_update_to [opponent, 'board’], target: 'board’, partial: 'games/board’, locals: { … } broadcast_update_to [opponent, 'board’], target: 'opponent_name’, partial: 'games/opponent_name’, locals: { … } end DPOTUSBJOU

Slide 88

Slide 88 text

QMBZFST BDUJPOPGPQQPOFOU DPOTUSBJOU

Slide 89

Slide 89 text

DPOTUSBJOU

Slide 90

Slide 90 text

GJFME DPOTUSBJOU

Slide 91

Slide 91 text

# views/games/_field.html.erb <% if # character%> <%= # show character %> <% else %> <%= form_with model: game do |f| %> <%= f.hidden_field :field_nr, value: field_nr %> <%= f.hidden_field :player_id, value: player.id %> <%= f.submit '' %> <% end %> <% end %> GJFME DPOTUSBJOU

Slide 92

Slide 92 text

# views/games/_field.html.erb <%= turbo_frame_tag "field#{field_nr}" do %> <% if # already ticket %> <%= # show character %> <% else %> <%= form_with model: game do |f| %> <%= f.hidden_field :field_nr, value: field_nr %> <%= f.hidden_field :player_id, value: player.id %> <%= f.submit '' %> <% end %> <% end %> <% end %> GJFME DPOTUSBJOU

Slide 93

Slide 93 text

# controllers/games_controller.rb def update @player = game.players.find(games_params[:player_id]) game.update("field#{games_params[:field_nr]}” # more code end (BNFT$POUSPMMFS VQEBUF GJFME TVCNJU DPOTUSBJOU

Slide 94

Slide 94 text

(BNFT$POUSPMMFS VQEBUF GJFME TVCNJU HBNFVQEBUFT DPOTUSBJOU

Slide 95

Slide 95 text

(BNFT$POUSPMMFS VQEBUF GJFME TVCNJU HBNFVQEBUFT DPOTUSBJOU PXO6*DIBOHFT

Slide 96

Slide 96 text

# controllers/games_controller.rb def update @player = game.players.find(games_params[:player_id]) game.update("field#{games_params[:field_nr]}” render partial: ‘field', locals: # some locals end (BNFT$POUSPMMFS VQEBUF GJFME TVCNJU DPOTUSBJOU

Slide 97

Slide 97 text

(BNFT$POUSPMMFS VQEBUF GJFME TVCNJU HBNFVQEBUFT DPOTUSBJOU PXO6*DIBOHFT

Slide 98

Slide 98 text

(BNFT$POUSPMMFS VQEBUF GJFME TVCNJU HBNFVQEBUFT PQQPOFOU6* DIBOHFT PXO6*DIBOHFT DPOTUSBJOU

Slide 99

Slide 99 text

# models/game.rb class Game < ApplicationRecord after_update :broadcast_tick_to_opponent def broadcast_tick_to_opponent # guard for when it was not a field update broadcast_replace_to [player.opponent, 'board’], target: field_tag_id, partial: 'games/opponent_tick’, locals: # some locals end end HBNFVQEBUFT DPOTUSBJOU

Slide 100

Slide 100 text

Slide 101

Slide 101 text

Slide 102

Slide 102 text

Slide 103

Slide 103 text

(BNFT$POUSPMMFS VQEBUF GJFME TVCNJU HBNFVQEBUFT PQQPOFOU6* DIBOHFT PXO6*DIBOHFT DPOTUSBJOU

Slide 104

Slide 104 text

PQQPOFOU6* DIBOHFT PXO6*DIBOHFT DPOTUSBJOU

Slide 105

Slide 105 text

PQQPOFOU6* DIBOHFT PXO6*DIBOHFT DPOTUSBJOU

Slide 106

Slide 106 text

No content

Slide 107

Slide 107 text

DPOTUSBJOU

Slide 108

Slide 108 text

DPOTUSBJOU 0/-:QMBZFST

Slide 109

Slide 109 text

DPOTUSBJOU

Slide 110

Slide 110 text

DPOTUSBJOU "DUJPO$BCMF$POOFDUJPO

Slide 111

Slide 111 text

DPOTUSBJOU TFSWFS IFBERVBSUFS DMJFOU VT DPOOFDUJPO

Slide 112

Slide 112 text

DPOOFDUJPO DPOTUSBJOU TFSWFS IFBERVBSUFS DMJFOU VT

Slide 113

Slide 113 text

DPOOFDUJPO DPOTUSBJOU TFSWFS IFBERVBSUFS DMJFOU VT

Slide 114

Slide 114 text

DPOTUSBJOU # controllers/games_controller.rb def show if player cookies[:player_id] = player.id else # some other code end end

Slide 115

Slide 115 text

DPOTUSBJOU # channels/application_cable/connection.rb module ApplicationCable class Connection < ActionCable::Connection::Base def connect player = Player.find_by(id: cookies['player_id’]) reject_unauthorized_connection unless allow?(player) end end end

Slide 116

Slide 116 text

DPOTUSBJOU

Slide 117

Slide 117 text

DPOTUSBJOU

Slide 118

Slide 118 text

No content

Slide 119

Slide 119 text

FOEHBNFXIFOQMBZFSMFBWFT

Slide 120

Slide 120 text

DPOTUSBJOU

Slide 121

Slide 121 text

DPOTUSBJOU "DUJPO$BCMF$IBOOFM

Slide 122

Slide 122 text

DPOTUSBJOU TFSWFS IFBERVBSUFS DMJFOU VT DPOOFDUJPO DIBOOFM DIBOOFM DIBOOFM

Slide 123

Slide 123 text

DPOTUSBJOU # channels/application_cable/channels.rb module ApplicationCable class Channel < ActionCable::Channel::Base end end

Slide 124

Slide 124 text

DPOTUSBJOU # channels/turbo/streams_channel.rb class Turbo::StreamsChannel < ActionCable::Channel::Base extend Turbo::Streams::Broadcasts, Turbo::Streams::StreamName include Turbo::Streams::StreamName::ClassMethods # more code end UVSCPSBJMTHFN

Slide 125

Slide 125 text

Slide 126

Slide 126 text

DPOTUSBJOU # channels/game_channel.rb class GameChannel < ActionCable::Channel::Base extend Turbo::Streams::StreamName extend Turbo::Streams::Broadcasts include Turbo::Streams::StreamName::ClassMethods def subscribed # some subscribed logic that turbo wants end end

Slide 127

Slide 127 text

DPOTUSBJOU

Slide 128

Slide 128 text

DPOTUSBJOU DPOOFDU

Slide 129

Slide 129 text

DPOTUSBJOU DPOOFDU (BNF$IBOOFM TVCTDSJCF

Slide 130

Slide 130 text

DPOTUSBJOU DPOOFDU (BNF$IBOOFM TVCTDSJCF (BNF$IBOOFM TVCTDSJCFE

Slide 131

Slide 131 text

DPOTUSBJOU DPOOFDU (BNF$IBOOFM TVCTDSJCF (BNF$IBOOFM TVCTDSJCFE MFBWF

Slide 132

Slide 132 text

DPOTUSBJOU DPOOFDU (BNF$IBOOFM TVCTDSJCF (BNF$IBOOFM TVCTDSJCFE MFBWF (BNF$IBOOFM VOTVCTDSJCF

Slide 133

Slide 133 text

DPOTUSBJOU DPOOFDU (BNF$IBOOFM TVCTDSJCF (BNF$IBOOFM TVCTDSJCFE MFBWF (BNF$IBOOFM VOTVCTDSJCF (BNF$IBOOFM VOTVCTDSJCFE

Slide 134

Slide 134 text

DPOTUSBJOU DPOOFDU (BNF$IBOOFM TVCTDSJCF (BNF$IBOOFM TVCTDSJCFE MFBWF (BNF$IBOOFM VOTVCTDSJCF (BNF$IBOOFM VOTVCTDSJCFE QMBZFS CSPBEDBTU

Slide 135

Slide 135 text

DPOTUSBJOU DPOOFDU (BNF$IBOOFM TVCTDSJCF (BNF$IBOOFM TVCTDSJCFE MFBWF (BNF$IBOOFM VOTVCTDSJCF (BNF$IBOOFM VOTVCTDSJCFE PQQPOFOU6* DIBOHF QMBZFS CSPBEDBTU

Slide 136

Slide 136 text

DPOTUSBJOU # views/games/show.html.erb <%= turbo_stream_from @player, "board", channel: GameChannel %>

Slide 137

Slide 137 text

Slide 138

Slide 138 text

DPOTUSBJOU # channels/application_cable/connection.rb module ApplicationCable class Connection < ActionCable::Connection::Base identified_by :player def connect self.player = Player.find_by(id: cookies['player_id’]) reject_unauthorized_connection unless allow?(player) end end end

Slide 139

Slide 139 text

Slide 140

Slide 140 text

Slide 141

Slide 141 text

DPOTUSBJOU # models/player.rb class Player < ApplicationRecord def broadcast_unsubsciption broadcast_update_to [opponent, 'board’], target: 'board’, html: 'Your opponent left the game. Be careful of surprise attacks’ end end

Slide 142

Slide 142 text

4QFMM 8BUDIJOHUIF&QJD(BNF

Slide 143

Slide 143 text

No content

Slide 144

Slide 144 text

3BJMTJDB

Slide 145

Slide 145 text

3BJMTJDB 5VSCPSJB

Slide 146

Slide 146 text

3BJMTJDB 5VSCPSJB 5JDr 5BDr 5PFSJDB

Slide 147

Slide 147 text

DBTUJOH TVNNBSZ

Slide 148

Slide 148 text

DBTUJOH TVNNBSZ 8FC4PDLFUT à "DUJPO$BCMF à 5VSCP4USFBN

Slide 149

Slide 149 text

DBTUJOH TVNNBSZ CBTJDCSPBEDBTUJOH

Slide 150

Slide 150 text

DBTUJOH TVNNBSZ "DUJPO$BCMF$POOFDUJPOBEBQUJPO

Slide 151

Slide 151 text

DBTUJOH TVNNBSZ "DUJPO$BCMF$IBOOFMBEBQUJPO

Slide 152

Slide 152 text

No content

Slide 153

Slide 153 text

$SFEJUT

Slide 154

Slide 154 text

,FWJO-JFCIPM[ (JU)VCLFWLFW -JOLFE*OLFWJOMJFCIPM[ 5XJUUFS!,FWJO-JFCIPM[ SVCZTPDJBM!,FWJO-JFCIPM[ IUUQTHJUIVCDPNLFWLFWUVSCPTUSFBNBEWBODFE

Slide 155

Slide 155 text

(JU)VCLFWLFW -JOLFE*OLFWJOMJFCIPM[ 5XJUUFS!,FWJO-JFCIPM[ SVCZTPDJBM!,FWJO-JFCIPM[ IUUQTHJUIVCDPNLFWLFWUVSCPTUSFBNBEWBODFE 5IF&OE