Rails%203%20In%20Action

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Classes outside your control Forem::TopicsController and Forem::PostsController so that RSpec doesn’t barf when you run your tests. There are also the helpers in spec/helpers and the models in spec/models, which need to undergo similar changes. Did you break anything? Let’s find out with bin/rspec spec: 2 examples, 0 failures It doesn’t look like it, and that’s a good thing! Let’s commit this change to provide yourself with a nice little checkpoint: git add . git commit -m "Added the ability to reply to posts" Users of your engine are now able to add replies to topics created by themselves or other users. You’ve got a nice couple of features going for your engine, but they’re very inclusive. You haven’t yet seen how to use the application’s User model to add authorship to your topics and posts, nor any way of integrating this engine with your Ticketee application. But never fear! That’s what the next two sections are for. 17.7 Classes outside your control When creating an engine such as this one, you may want to rely on classes from the application. To relate posts and topics to users within the application, you could do this in the models: belongs_to :user But what if the concept of users in the application isn’t kept within a User model at all? Then this would break. You could store a couple of common model names, such as User, Person, or Account and check for those, but that’s prone to breakage as well. Here we’ll cover the theory behind configuration options, which you can use to let your engine know the application’s User model. 17.7.1 Engine configuration Within this engine you’re going to want to reference the User model from your application so that you are able to attribute posts and topics to whomever has created them. However, there’s a catch: within the application, the model that refers to the user in the system may not be called User! Therefore, you’re going to need to create a way to inform the engine of what this class is called from within the application. The best way to inform the engine about the User model would be to have a file called config/initializers/forem.rb which will run when the application loads like all other initializers. This file would contain a single line, which would tell the engine what class represents users within this application, like this: Forem::Engine.user_class = User This configuration setting will then be maintained by your engine across requests, and you’ll be able to reference Forem::Engine.user_class wherever you need it within 497
498 CHAPTER 17 Engines your application. To add this setting to the engine, you can use a class-level attr_accessor call within the Forem::Engine class, inside lib/forem/engine.rb: class
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IN ACTION Ryan Bigg Yehuda Katz MAN
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Rails 3 in Action RYAN BIGG YEHUDA
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1 ■ Ruby on Rails, the framework
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viii 3 4 5 6 CONTENTS Developing a
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x 9 10 CONTENTS 8.5 Restricting wri
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xii 13 14 CONTENTS 12.2 Subscribing
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xiv 18 CONTENTS 17.4 Setting up a t
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xvi PREFACE cover. It also takes a
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xviii ACKNOWLEDGMENTS gnarly ePub R
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xx about this book Ruby on Rails is
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xxii ABOUT THIS BOOK By chapter 16,
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about the cover illustration The fi
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2 CHAPTER 1 Ruby on Rails, the fram
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10 CHAPTER 1 Ruby on Rails, the fra
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24 CHAPTER 2 Testing saves your bac
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This chapter covers � Building th
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46 CHAPTER 3 Developing a real Rail
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84 CHAPTER 4 Oh CRUD! 4.1.1 Writing
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86 CHAPTER 4 Oh CRUD! Aha! You’re
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88 CHAPTER 4 Oh CRUD! 4.2 Editing p
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90 CHAPTER 4 Oh CRUD! 4.2.2 The upd
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92 CHAPTER 4 Oh CRUD! 4.3.1 Writing
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94 CHAPTER 4 Oh CRUD! Figure 4.1 Ac
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96 CHAPTER 4 Oh CRUD! F When the te
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98 CHAPTER 4 Oh CRUD! functionality
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100 CHAPTER 5 Nested resources New
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102 CHAPTER 5 Nested resources an e
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104 CHAPTER 5 Nested resources 5.1.
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106 CHAPTER 5 Nested resources Then
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108 CHAPTER 5 Nested resources Grea
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110 CHAPTER 5 Nested resources see
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112 CHAPTER 5 Nested resources The
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114 CHAPTER 5 Nested resources Agai
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116 CHAPTER 5 Nested resources show
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118 CHAPTER 6 Authentication and ba
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This chapter covers � Adding an a
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138 CHAPTER 7 Basic access control
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This chapter covers � Expanding w
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166 CHAPTER 8 More authorization Un
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168 CHAPTER 8 More authorization pe
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170 CHAPTER 8 More authorization Th
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172 CHAPTER 8 More authorization ..
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176 CHAPTER 8 More authorization 8.
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178 CHAPTER 8 More authorization Re
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180 CHAPTER 8 More authorization Cr
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184 CHAPTER 8 More authorization De
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186 CHAPTER 8 More authorization De
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188 CHAPTER 8 More authorization To
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194 CHAPTER 8 More authorization Yo
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196 CHAPTER 8 More authorization cu
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198 CHAPTER 8 More authorization
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202 CHAPTER 8 More authorization Li
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204 CHAPTER 8 More authorization
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206 CHAPTER 8 More authorization Si
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208 CHAPTER 8 More authorization Li
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212 CHAPTER 8 More authorization 45
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214 CHAPTER 9 File uploading By pro
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216 CHAPTER 9 File uploading that t
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218 CHAPTER 9 File uploading remove
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220 CHAPTER 9 File uploading This f
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222 CHAPTER 9 File uploading asset
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224 CHAPTER 9 File uploading 9.2.2
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226 CHAPTER 9 File uploading you ha
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228 CHAPTER 9 File uploading sign_i
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230 CHAPTER 9 File uploading When y
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232 CHAPTER 9 File uploading You co
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234 CHAPTER 9 File uploading The /a
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236 CHAPTER 9 File uploading When y
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238 CHAPTER 9 File uploading Open a
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240 CHAPTER 9 File uploading This i
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242 CHAPTER 9 File uploading After
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244 CHAPTER 10 Tracking state used,
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246 CHAPTER 10 Tracking state group
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248 CHAPTER 10 Tracking state Listi
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250 CHAPTER 10 Tracking state end @
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252 CHAPTER 10 Tracking state With
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254 CHAPTER 10 Tracking state which
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256 CHAPTER 10 Tracking state The f
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258 CHAPTER 10 Tracking state class
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264 CHAPTER 10 Tracking state Good,
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266 CHAPTER 10 Tracking state You c
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268 CHAPTER 10 Tracking state You h
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270 CHAPTER 10 Tracking state You
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276 CHAPTER 10 Tracking state def m
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278 CHAPTER 10 Tracking state 10.5
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280 CHAPTER 10 Tracking state 33 of
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282 CHAPTER 10 Tracking state 10.5.
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284 CHAPTER 10 Tracking state it "c
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This chapter covers � Tagging spe
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288 CHAPTER 11 Tagging And I press
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290 CHAPTER 11 Tagging To define th
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292 CHAPTER 11 Tagging 11.2 Adding
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294 CHAPTER 11 Tagging 11.2.2 Fixin
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296 CHAPTER 11 Tagging Because the
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298 CHAPTER 11 Tagging ment from th
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300 CHAPTER 11 Tagging true, :url
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302 CHAPTER 11 Tagging get there pr
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304 CHAPTER 11 Tagging And I follow
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306 CHAPTER 11 Tagging The :from op
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308 CHAPTER 11 Tagging This is beca
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310 CHAPTER 11 Tagging into this:
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This chapter covers � Sending ema
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314 CHAPTER 12 Sending email To tes
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316 CHAPTER 12 Sending email Let’
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318 CHAPTER 12 Sending email Now th
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320 CHAPTER 12 Sending email the em
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322 CHAPTER 12 Sending email Great
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324 CHAPTER 12 Sending email messag
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326 CHAPTER 12 Sending email A B cr
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328 CHAPTER 12 Sending email Next,
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330 CHAPTER 12 Sending email As usu
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332 CHAPTER 12 Sending email When y
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334 CHAPTER 12 Sending email applic
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336 CHAPTER 12 Sending email Listin
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338 CHAPTER 12 Sending email To ins
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340 CHAPTER 12 Sending email 12.4 R
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342 CHAPTER 12 Sending email 12.4.2
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344 CHAPTER 12 Sending email When y
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346 CHAPTER 12 Sending email By sen
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348 CHAPTER 13 Designing an API One
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350 CHAPTER 13 Designing an API cri
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352 CHAPTER 13 Designing an API RSp
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354 CHAPTER 13 Designing an API ] }
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356 CHAPTER 13 Designing an API In
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358 CHAPTER 13 Designing an API Boo
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360 CHAPTER 13 Designing an API 13.
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362 CHAPTER 13 Designing an API Thi
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364 CHAPTER 13 Designing an API err
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366 CHAPTER 13 Designing an API To
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372 CHAPTER 13 Designing an API @pr
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374 CHAPTER 13 Designing an API The
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376 CHAPTER 13 Designing an API Lis
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378 CHAPTER 13 Designing an API You
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382 CHAPTER 13 Designing an API you
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384 CHAPTER 13 Designing an API git
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386 CHAPTER 14 Deployment done. Thi
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388 CHAPTER 14 Deployment useradd -
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390 CHAPTER 14 Deployment rvm group
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392 CHAPTER 14 Deployment To be as
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394 CHAPTER 14 Deployment service s
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396 CHAPTER 14 Deployment 14.5.1 De
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398 CHAPTER 14 Deployment The final
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400 CHAPTER 14 Deployment With the
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402 CHAPTER 14 Deployment executing
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404 CHAPTER 14 Deployment The first
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406 CHAPTER 14 Deployment You can e
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408 CHAPTER 14 Deployment Once Rail
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410 CHAPTER 14 Deployment This mean
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This chapter covers � Authenticat
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414 CHAPTER 15 Alternative authenti
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This chapter covers � Implementin
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436 CHAPTER 16 Basic performance en
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548 APPENDIX B Tidbits You should g
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Special characters and numbers $ fu
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authentication (continued) OAuth, 4
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CSRF (cross-site request forgery) a
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find_or_create_for_twitter method,
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last_post method, 510 last_ticket m
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Project.for method, 531 projects, 5
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searching by state, 305-309 testing
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toggle_watching_button method, 330
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WEB DEVELOPMENT/RUBY R ails Rails 3
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