rom 4.0 is coming

Transcript

1. ROM-RB 4.0 IS COMING
   PIOTR SOLNICA >> BRIGHTON RUBY 2017
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2. PIOTR SOLNICA
   > ! Cracow, Poland
   > github.com/solnic
   > @_solnic_
   > solnic.eu
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3. TECH LEAD AT ICELAB
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4. WHAT'S ROM-RB?
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5. an open-source persistence and
   mapping toolkit for Ruby built for
   speed and simplicity
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6. DATABASE-AGNOSTIC, FLEXIBLE,
   EXTENDIBLE, FAST, SIMPLE
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7. FOR REAL !
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8. SOUNDS LIKE SOME
   CRAZY
   OBJECT RELATIONAL
   MAPPER, EH?
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9. ROM
   IS NOT
   AN ORM
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10. WHY DOES IT EVEN EXIST?
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11. A TRUE ALTERNATIVE TO ACTIVE RECORD
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12. ROM-RB PROVIDES A WAY TO
    SEPARATE PERSISTENCE CONCERNS
    FROM APPLICATION DOMAIN
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13. WHAT'S THE
    DEAL WITH 4.0?
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14. RUBYISTS LOVE MAGIC
    ˾(✿˙ᗜ˙)੭ʓ̤ꚍ.*ꙓꙏꚍ
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15. MAGIC
    AKA: IMPLICIT CODE
    AKA: EASY TO USE ABSTRACTIONS
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16. ACTIVERECORD
    POSSIBLY THE MOST MAGICAL GEM IN THE UNIVERSE
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17. NO BOILERPLATE
    class User < ActiveRecord::Base
    end
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18. PERSISTENCE, SO SIMPLE
    user = User.create(name: "Jane")
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19. QUERIES, SO SIMPLE
    User.where(name: "Jane").first
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20. MAKING CHANGES, SO SIMPLE
    User.where(name: "Jane").update_all(name: "Jane Doe")
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21. EASE OF USE
    > Little code to write to get started
    > A lot of functionality OOTB
    > No boilerplate
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22. THIS IS A REAL CHALLENGE FOR ROM-RB!
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23. > Dynamic query interface
    > Explicit representation of data structures
    > Mapping to struct objects decoupled from the database
    > No concept of lazy-loadable associations
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24. THIS IS FINE
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25. WE MADE IT
    (⊃ꙏ•́‿•̀ꙏ)⊃━☆ꚍ.*ꙓꙏꚍ
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26. RELATIONS AND STRUCTS
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27. class Users < ROM::Relation[:sql]
    schema(infer: true)
    end
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28. ✅ NO BOILERPLATE
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29. users.changeset(:create, name: "Jane").commit
    # => #
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30. ✅ PERSISTENCE, SO SIMPLE
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31. users.where(name: "Jane").first
    # => #
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32. ✅ QUERIES, SO SIMPLE
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33. users.where(name: "Jane").changeset(:update, name: "Jane Doe").commit
    # => #
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34. ✅ MAKING CHANGES, SO SIMPLE
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35. BUT...
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36. users.first
    # => #
    users.select(:name).first
    # => #
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37. PEOPLE WANT THEIR OWN METHODS, OBVIOUSLY
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38. class User < ActiveRecord::Base
    def first_name
    name.split(' ').first
    end
    def last_name
    name.split(' ').last
    end
    end
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39. ROM-RB: CUSTOM STRUCT NAMESPACE
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40. class Users < ROM::Relation[:sql]
    struct_namespace Entities
    schema(infer: true)
    end
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41. class Users < ROM::Relation[:sql]
    struct_namespace Entities
    schema(infer: true)
    end
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42. module Entities
    class User < ROM::Struct
    def first_name
    name.split(' ').first
    end
    def last_name
    name.split(' ').last
    end
    end
    end
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43. module Entities
    class User < ROM::Struct
    def first_name
    name.split(' ').first
    end
    def last_name
    name.split(' ').last
    end
    end
    end
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44. user = users.first
    => #
    user.first_name
    # "Jane"
    user.last_name
    # "Doe"
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45. user = users.select(:name).first
    => #
    user.first_name
    # "Jane"
    user.last_name
    # "Doe"
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46. WHAT DOES THIS MEAN, REALLY? !
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47. THE TRUTH
    ABOUT MAGIC
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48. EXCITEMENT ABOUT MAGIC (AKA HAPPINESS)
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49. ROM-RB DOESN'T ENFORCE MAGIC!
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50. AT ANY POINT IN TIME
    YOU CAN DEFINE STRUCTS
    WITH EXPLICIT ATTRIBUTES
    AND ASK ROM-RB TO LOAD THEM
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51. require "entities/address"
    module Entities
    class UserProfile < ROM::Struct
    attribute :email, Types::Strict::String
    attribute :name, Types::Strict::String
    attribute :age, Types::Strict::Integer
    attribute :address, Address
    end
    end
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52. users.combine(:address).as(:user_profile).first
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53. HOWEVER...THIS REQUIRES TIME,
    AND GOOD UNDERSTANDING OF THE APPLICATION DOMAIN!
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54. IT'S A PROCESS, AND ROM-RB FULLY SUPPORTS IT
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55. 4.0.0.BETA
    WAS RELEASED A COUPLE
    WEEKS AGO !
    (JUST SAYING!)
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56. THANK YOU !
    ! GITHUB.COM/ROM-RB/ROM
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