UT on Rails3 2010- Week 1
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The document summarizes key concepts of Rails architecture, including MVC (Model-View-Controller), ORM (Object Relational Mapping), and RESTful design principles. It explains how Rails follows the DRY (Don't Repeat Yourself) principle and the convention over configuration philosophy to simplify development. Additionally, it contrasts Ruby as a programming language with Rails as a web framework built on Ruby.
UT on Rails3 2010- Week 1
- 1. Rails Summer of Code Week 1 Richard Schneeman - @ThinkBohemian
- 2. Rails - Week 1 • Rails Architecture • MVC (Model View Controller) • ORM (Object Relational Mapping) • RESTful (REpresentational STate) • Ruby • Versus Rails • Is Object Oriented Richard Schneeman - @ThinkBohemian
- 3. Rails Architecture • Terminology • DRY • Convention over Configuration • Rails Architecture • MVC (Model View Controller) • ORM (Object Relational Mapping) • RESTful (REpresentational State Transfer) Richard Schneeman - @ThinkBohemian
- 4. DRY Don’t Repeat Yourself Reuse, don’t re-invent the... Richard Schneeman - @ThinkBohemian
- 5. Convention over Configuration Decrease the number of decisions needed, gaining simplicity but without losing flexibility. Richard Schneeman - @ThinkBohemian
- 6. Model-View-Controller • Isolates “Domain Logic” • Can I See it? • View • Is it Business Logic? • Controller • Is it a Reusable Class Logic? • Model Richard Schneeman - @ThinkBohemian
- 7. Model-View-Controller • Generated By Rails • Grouped by Folders • Connected “AutoMagically” • Models • Views • Controllers • Multiple Views Per Controller Richard Schneeman - @ThinkBohemian
- 8. Object Relational Mapping • Maps database backend to ruby objects • ActiveRecord (Rail’s Default ORM) >> userVariable = User.where(:name => "Bob") Generates: SELECT "users".* FROM "users" WHERE (name = 'bob') >> userVariable.name => Bob Richard Schneeman - @ThinkBohemian
- 9. Object Relational Mapping • >> userVariable = User .where(:name => "Bob") models/user.rb class User < ActiveRecord::Base end the User class inherits from ActiveRecord::Base Richard Schneeman - @ThinkBohemian
- 10. Object Relational Mapping • >> userVariable = User. where(:name => "Bob") where is the method that looks in the database AutoMagically in the User Table (if you made one) Richard Schneeman - @ThinkBohemian
- 11. RESTful REpresentational State Transfer • The state of the message matters • Different state = different message “You Again?” “You Again?” Richard Schneeman - @ThinkBohemian
- 12. RESTful REpresentational State Transfer • Servers don’t care about smiles • They do care about how you access them • (HTTP Methods) • GET • PUT • POST • DELETE Richard Schneeman - @ThinkBohemian
- 13. RESTful REpresentational State Transfer • Rails Maps Actions to HTTP Methods • GET - index, show, new • PUT - update • POST - create • DELETE - destroy Richard Schneeman - @ThinkBohemian
- 14. Ruby Versus Rails • Ruby - Is a programming Language • Like C# or Python • Can be used to program just about anything, • Rails - Is a Framework • Written using Ruby • Provides common web functionality Richard Schneeman - @ThinkBohemian
- 15. Questions? Richard Schneeman - @ThinkBohemian