Plain, Old, But Mighty: Leveraging POROs in Greenfield and Legacy Code

Leveraging POROs in Greenﬁeld and Legacy Code

@SwetaSanghavi

Leveraging POROs in Greenﬁeld and Legacy Code

HELLO! I’m...

Morty! HELLO! I’m...

What is a PORO? Grow Greenﬁeld Code Reign In Legacy
Code 1 3 2

@SwetaSanghavi What is a PORO? 💎

@SwetaSanghavi A Plain Old Ruby Object does not inherit any
functionality from Rails 2 🌱

@SwetaSanghavi 1 💎

@SwetaSanghavi Flexibility 2 Useable API Faster Testing 💎

@SwetaSanghavi Grow Greenﬁeld Code 🌱

@SwetaSanghavi 🌱

@SwetaSanghavi 2 🌱

@SwetaSanghavi 🌱

@SwetaSanghavi ✅ 2 🌱

@SwetaSanghavi Flexibility 1 2 🌱

@SwetaSanghavi POROs introduce a new seam into our code 2
🌱

@SwetaSanghavi A seam is a place where you can alter
behavior in your program without editing in that place 2 Working Eﬀectively with Legacy Code - Michael Feathers 🌱

@SwetaSanghavi Wrap uncertainty in POROs giving our code space to
evolve 2 🌱

@SwetaSanghavi Faster and simpler testing 2 2 🌱

@SwetaSanghavi Semantic Easy-to-Use API 3 2 🌱

@SwetaSanghavi 1 2 🌱

@SwetaSanghavi Thinking of the new object is harder than writing
the code 3 All the Little Things - Sandi Metz 2 🌱

@SwetaSanghavi Legacy Code 🧶 Don't make me change that code,
mom!

@SwetaSanghavi • Code that the original developer no longer maintains,
whether from another developer or team • Code that is no longer engineered but continually patched • Untested Code The Engineer's Complete Guide to Legacy Code 3 🧶

@SwetaSanghavi Code Attracts Code 3 🧶

@SwetaSanghavi 3 👹 3 3 🧶

@SwetaSanghavi 3 🧶

@SwetaSanghavi Increased legibility 4 3 🧶

@SwetaSanghavi Semantic Easy-to-Use API 3 2 3 🧶

@SwetaSanghavi Opportunities for Decoupling 4 2 3 🧶

@SwetaSanghavi 🧶

@SwetaSanghavi Introducing a new object for future extensions or modiﬁcations
3 🧶

@SwetaSanghavi 3 Approaching Untested Code 🧶

@SwetaSanghavi Breaking Dependencies to Introduce Tests 3 🧶

@SwetaSanghavi 2 3 🧶

@SwetaSanghavi Narrow slice of tested code 🧶

@SwetaSanghavi 🧶

@SwetaSanghavi

THANK YOU! [email protected] @SwetaSanghavi @MortyOnRails

CREDITS • Books ◦ Working Eﬀectively with Legacy Code -
Michael Feathers • Talks ◦ All the Little Things - Sandi Metz ◦ Refactoring from Good to Great - Ben Orenstein • Presentation Template ◦ SlidesMania • Images ◦ FullofCharm Maine Coons ◦ La Guarimba Film Festival ◦ Saeedabusinn on Pinterest ◦ Conceptual Understanding of Ruby Classes and Objects for Beginners

CREDITS • Talk Feedback ◦ Dawn Richardson ◦ Aji Slater
◦ Nicolas Collins ◦ Gautam Sanghavi ◦ Daksha Sanghavi

CREDITS • Talk Feedback ◦ Dawn Richardson ◦ Aji Slater
◦ Nicolas Collins ◦ Gautam Sanghavi ◦ Daksha Sanghavi Dad!

Plain, Old, But Mighty: Leveraging POROs in Gre...

Plain, Old, But Mighty: Leveraging POROs in Greenfield and Legacy Code

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