Applications First, Frameworks Second

This is the short presentation before the start of my workshop at Railsconf 2014. The deck is short. It's just an introduction to the code found on github. https://github.com/ahawkins/applications-first-frameworks-second see https://github.com/ahawkins/applications-first-frameworks-second/pulls?direction=asc&page=1&sort=created&state=closed to work though the steps.

Transcript

1. Applications First,!
   Frameworks Second
   Railsconf 2014 Workshop by @adman65
   https://github.com/ahawkins/applications-first-frameworks-second
   https://github.com/ahawkins/chassis
   

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2. Agree with
   DHH?
   

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3. This may be
   the wrong place
   

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4. I may be an!
   Architecture !
   Astronaut
   

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6. We’re Making
   a Blog!
   

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7. Patterns
   

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8. Tests
   

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9. Service
   Objects
   

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10. Form Objects
    

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11. Repository
    

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12. Chassis
    

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13. ActiveRecord
    

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14. ActionPack
    

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15. Go
    

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16. Step 1: pulls/1
    • Make “bundle exec rake” run tests
    • Create a failing test to ensure things work correctly
    • git checkout feature/step-1 ; git checkout HEAD~2
    

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17. Step 2: pulls/2
    • git checkout -b feature/step-1; git checkout -b my-step-2
    • Create a failing acceptance/integration/system test
    • This test should create a “Post” with a “title” & “text”
    attributes
    • Test that this object is persisted some how
    • PublishPost — Service Object — instantiated with the form
    • PublishPostForm — models input — instantiated with a Hash
    • PostRepo — manages the Posts
    

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18. Step 3: pulls/3
    • git checkout -b feature/step-2
    • Write a unit test for the “Post” class
    • Test it can be initialized with a Hash
    • ruby test/post_test.rb
    

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19. Step 4: pulls/4
    • git checkout -b feature/step-3
    • Define “PublishPostForm”
    • Hint: use Chassis.form (see chassis readme)
    • Hint: nothing to test yet
    

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20. Step 5: pulls/5
    • git checkout feature/step-4
    • Create “PostRepo”
    • Use Chassis::Repo::Delegation
    • Refer to chassis README for an example
    • No tests needed for this one
    

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21. Step 6: pulls/6
    • Introduce a stub “PublishPost” service object
    • It should implement the interface in the acceptance
    tests
    • Don’t add functionality
    

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22. Step 7: pulls/7
    • Write that implementation
    • Hint: include Chassis::Persistence in Post
    

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23. Step 8: pulls/8
    • Add another test case to the acceptance test that
    does not include a “text”/“title”
    • Make it pass!
    • Hint: add validation to the form
    • Chassis.repo.clear
    

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24. Step 9: pulls/9
    • Add Rails,
    • I’ll do this
    • Let’s talk about it
    

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25. Step 10: pulls/10
    • Time to think in HTML
    • Use capybara to create failing tests and submits a
    form and then displays the post
    

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26. Step 11: pulls/11
    • Make it green
    

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27. Step 12: pulls/12
    • Make UI handle validation errors
    

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28. Step 13: pulls/13
    • Persistence with ActiveRecord
    

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