Rails 4: Appetizers

Features in Rails 4.0 -- presented at @houstonrb

Transcript

1. Rails 4: Appetizers
   @jwo for @houstonrb
   Wednesday, July 10, 13
   

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2. Rubies
   Ruby 1.9.3 at least, prefer 2.0
   Rails 2.3 => End of Life
   Ruby 1.8.7 => End of Life
   Wednesday, July 10, 13
   

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3. Bootup time
   faster on Ruby 2.0 with Rails 4
   How fast?
   Cray Cray Faster
   Wednesday, July 10, 13
   

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4. Cache Digests
   Caches the view (partials) by the
   updated_at column
   Wednesday, July 10, 13
   

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5. Best if you have a upper-most
   site object.
   Example: Basecamp has an
   upper-most Account object.
   Cache Digests
   Wednesday, July 10, 13
   

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6. So: Add a Site object that has
   upper-most updated at.
   Cache Digests
   Wednesday, July 10, 13
   

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7. Will help with sidebar that does
   not directly belong to a Post.
   Cache Digests
   Wednesday, July 10, 13
   

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8. Uses JavaScript to pull only the
   tag
   Turbolinks
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9. Speeds up document based sites
   Turbolinks
   Wednesday, July 10, 13
   

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10. Most everybody should add
    jquery-turbolinks
    Turbolinks
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11. Watch out for:
    Turbolinks
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12. External javascript (stripe)
    Data tags on the body object
    things in the `` like
    `` tags<br/>Tubolinks<br/>Wednesday, July 10, 13<br/>

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13. Most everything, ever
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14. Moves Mass Assignment
    protection to the controllers
    Strong Parameters
    Wednesday, July 10, 13
    

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15. you have to manually remove
    attr_accessible if upgrading
    Strong Parameters
    Wednesday, July 10, 13
    

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16. PostgreSQL Additions
    hstore: JSON store, attributes,
    better Single Table Inheritance
    Wednesday, July 10, 13
    

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17. PostgreSQL Additions
    Arrays: tagging, parent child
    ancestry
    Wednesday, July 10, 13
    

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18. Arel Changes
    find_by_customer_id => lives!
    find(:all, conditions:
    ["customer_id = ?", 45]) => DEAD
    find(customer_id: 45) => new
    Wednesday, July 10, 13
    

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19. Arel Changes
    find_or_create_by_customer_id()
    => dead
    find_or_create_by(customer_id:
    45) => new!
    Wednesday, July 10, 13
    

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20. Arel Changes
    where(id: 45).first_or_create =>
    new hotness
    .all => deprecated
    Wednesday, July 10, 13
    

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21. Scope Changes
    scope :future, where("created_at
    > ?", Time.now) => syntax error
    Wednesday, July 10, 13
    

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22. Scope Changes
    scope :future, →
    { where("created_at > ?",
    Time.now) }
    Wednesday, July 10, 13
    

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23. MultiThreaded
    It's on, baby!
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24. Moved to Gems
    Observers
    ActiveRecord SessionStore
    ActiveResource LOL
    Action & Page Caching
    Wednesday, July 10, 13
    

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25. Test Directories
    test/unit => test/models
    test/functional => test/
    controllers
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26. Misc
    Gemfile has no Assets section
    Concerns directory is prevalent
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27. Misc
    /bin shows up (binstubs)
    Plugins must be moved to lib
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28. Misc
    ActionController::Live => (not
    alot of attention)
    Patch verb in REST
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29. Misc
    before_filters are now
    before_action
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30. Didn't Make it
    Queue API
    Async Mailers
    Wednesday, July 10, 13
    

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31. get more information
    http:/
    /blog.wyeworks.com/
    Rails Conf 2013 Postgres, the
    Best Tool You're Already Using
    Wednesday, July 10, 13
    

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32. get more information
    http:/
    /rails-upgrade-
    checklist.com
    http:/
    /upgradingtorails4.com
    http:/
    /upgradingrails.com
    Wednesday, July 10, 13
    

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33. Thanks!
    I’m @jwo
    Wednesday, July 10, 13
    

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