Ruby Meditation #1 February 23, 2013 Kyiv

1. Practical SOLID
with Rails
Andrey Savchenko
CTO @ Aejis
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2. Let’s start the our new, awesome project!
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3. class < ActiveRecord::Base
belongs_to :company
has_many :products
has_many :warehouses
validates_presence_of :name
end
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5. 10 months later...
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8. SOLID
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9. SOLID
• Single responsibility principle
• Open-Closed principle
• Liskov substitution principle
• Interface segregation principle
• Dependency inversion principle
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10. SRP
• Easy to read
• Easy to change
• Easy to reuse
No god objects
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21. PROFIT!?
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22. So much objects? NO!
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23. YES!
• https://github.com/drapergem/draper
• https://github.com/mbj/aequitas
• https://github.com/Ptico/resourced
• https://github.com/bogdan/datagrid
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24. OCP
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27. LSP
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28. ISP
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29. DI
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32. Picture with cat
Because everyone loves cats <3
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33. Questions?
• Twitter: @ptico
• Github: @ptico
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