Introduction to Ruby, MVC, and the Rails Framework Professor Larry - - PowerPoint PPT Presentation

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introduction to ruby mvc and the rails framework
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Introduction to Ruby, MVC, and the Rails Framework Professor Larry - - PowerPoint PPT Presentation

Nov 21, 2022 1.11k likes •1.34k views

Introduction to Ruby, MVC, and the Rails Framework Professor Larry Heimann Application Design & Development Information Systems Program Philosophy of Ruby For me, the purpose of life is, at least partly, to have joy. Programmers often

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Introduction to Ruby, MVC, and the Rails Framework

Professor Larry Heimann Application Design & Development Information Systems Program

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Philosophy of Ruby

“For me, the purpose of life is, at least partly, to have joy. Programmers often feel joy when they can concentrate on the creative side of programming, so Ruby is designed to make programmers happy.”

— Yukihiro Matsumoto

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Three Principles

  • 1. Conciseness—Writing code in Ruby should involve the minimum amount of

commands necessary. Code should be terse but also understandable.

  • 2. Consistency—Ruby coding should follow common conventions that make

coding intuitive and unambiguous.

  • 3. Flexibility—There is no one right way. You should be able to pick the best

approach for your needs and be able to even modify the base classes if necessary. These three together lead to an important concept in Ruby — the principle of least surprise.

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Comic of the Day...

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The Ruby Way

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Everything is an object

Looking at Strings, we see:

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Revising the String class

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Destructive and Predicate methods

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Architecting Software

  • Needs to be:
  • understandable
  • extensible
  • Many different architecture patterns exist
  • Model-View-Controller (MVC) one of the most popular
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MVC is like ...

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Model: Taking Care of Business

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View: Looking Good

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View: Partials

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Controller: Holding It All Together

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Controllers: Too Fat To Be Useful

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Controllers: Variations

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Controller: Traffic Cop

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MVC as used in Rails

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SLIDE 19

Class Exercise To know the Model-View-Controller, you must be the Models, Views and Controllers...