What’s missing?

Transcript

1. What’s missing?
   Ivan Nemytchenko, @inem, 2019
   

   View Slide

2. Rubytrip!
   40 days, 4 conferences, 8 countries
   - RubyConfBY Minsk - April 6
   - RubyDay Verona - April 11
   - RubyWine Kishinev - April 13
   - RailsConf Minneapolis - April 30
   - Saint P RubyConf - June 1-2
   railshurts.com/rubytrip
   

   View Slide

3. railshurts.com/lifecycle
   

   View Slide

4. railshurts.com
   

   View Slide

5. View Slide

6. View Slide

7. View Slide

8. View Slide

9. View Slide

10. View Slide

11. View Slide

12. View Slide

13. What’s missing?
    

    View Slide

14. ?
    

    View Slide

15. OOP?
    Design patterns?
    SOLID?
    Functional Programming?
    DDD?
    7 ways to refactor fat models …
    What should we take
    into account?
    Well…
    

    View Slide

16. What should we take
    into account?
    Interaction with external world
    Applications vs libraries
    Layered architecture
    Levels of abstractions
    REST
    Domain Driven Design
    12 factors
    Imperative vs Declarative
    Functional approach
    Side effects
    State management
    Types
    Polymorphism
    System thinking
    

    View Slide

17. Painless Rails principles
    1.Differentiate
    'schema' from
    'implementation'
    2.Reduce entry point
    pressure
    3.Control the number
    of degrees of
    freedom of the app
    4.Don't mix layers of
    abstractions
    5.Don't fight against
    the framework
    railshurts.com/rails-principles
    

    View Slide

18. Sources
    SICP
    (Structure and
    Interpretation of
    Computer
    Programs)
    TAPL
    (Types and
    Programming
    Languages)
    by Benjamin C.
    Pierce
    DDD
    (Domain-driven
    design)
    by Eric J. Evans
    CC2e
    (Code Complete
    2nd edition)
    by Steve
    McConnell
    railshurts.com/rails-principles
    ISO/IEC/
    IEEE 42010
    Systems and
    software
    engineering —
    Architecture
    description
    

    View Slide

19. inem@bk.ru
    @inem
    railshurts.com/rails-principles
    

    View Slide

20. April 14 20:00 (Msk/Minsk time)
    railshurts.com/webinar
    How to stop worrying about ActiveRecord and love Rails again
    

    View Slide