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Hands on Ruby on Rails

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    Hands on Ruby on Rails Hands on Ruby on Rails Presentation Transcript

    • Hands On Ruby on RailsBuilding Your First AppChris Kemp, salesforce.com, Sr. Solution Engineer
    • Safe Harbor Safe harbor statement under the Private Securities Litigation Reform Act of 1995: This presentation may contain forward-looking statements that involve risks, uncertainties, and assumptions. If any such uncertainties materialize or if any of the assumptions proves incorrect, the results of salesforce.com, inc. could differ materially from the results expressed or implied by the forward- looking statements we make. All statements other than statements of historical fact could be deemed forward-looking, including any projections of product or service availability, subscriber growth, earnings, revenues, or other financial items and any statements regarding strategies or plans of management for future operations, statements of belief, any statements concerning new, planned, or upgraded services or technology developments and customer contracts or use of our services. The risks and uncertainties referred to above include – but are not limited to – risks associated with developing and delivering new functionality for our service, new products and services, our new business model, our past operating losses, possible fluctuations in our operating results and rate of growth, interruptions or delays in our Web hosting, breach of our security measures, the outcome of intellectual property and other litigation, risks associated with possible mergers and acquisitions, the immature market in which we operate, our relatively limited operating history, our ability to expand, retain, and motivate our employees and manage our growth, new releases of our service and successful customer deployment, our limited history reselling non-salesforce.com products, and utilization and selling to larger enterprise customers. Further information on potential factors that could affect the financial results of salesforce.com, inc. is included in our annual report on Form 10-Q for the most recent fiscal quarter ended July 31, 2012. This documents and others containing important disclosures are available on the SEC Filings section of the Investor Information section of our Web site. Any unreleased services or features referenced in this or other presentations, press releases or public statements are not currently available and may not be delivered on time or at all. Customers who purchase our services should make the purchase decisions based upon features that are currently available. Salesforce.com, inc. assumes no obligation and does not intend to update these forward-looking statements.
    • Session Agenda • Introduction to Ruby, Rails, and Heroku (10 min) • Getting Started (5 min) • Building a Blogging App (25 min) • Deploying to Heroku (10 min) • Q&A (10 min)
    • What is Ruby? • Created by Yukihiro "Matz" Matsumoto, released in 1995 • Open source, object-oriented programming language • Sparse but expressive syntax • Runs on every platform • Garbage-collected • Dynamic type checking • No compiler
    • Ruby Sample: In Apex: posts.each do |post| for (Post current : posts) { unless post.done? if (!post.isDone()) { editor.review(current); editor.review post } else { else post.submit(); post.submit } end } end
    • Ruby on Rails • Web-app development framework for Ruby • Convention over configuration • Model-View-Controller pattern • DRY (don’t repeat yourself) • RESTful • Testing should be baked in
    • Rails Directory Structure Conventions … app/ controllers/ helpers/ mailers/ models/ views/ config/ db/ …
    • What is Heroku and why should I use it? • Salesforce’s Platform as a Service • Forget Servers • Run Anything • See Everything • Scale Rapidly • Integrate to Salesforce with databasedotcom gem
    • Getting Started with Heroku • Install Heroku Toolbelt (CLI, Foreman, Git) • Install Ruby 1.9.2 • Install Rails • Install PostgreSQL • Use RVM, Homebrew, RubyGemshttp://bit.ly/LN9nvK
    • Creating a Ruby on Rails app • Create a new Rails app $ rails new blog
    • Dependency Management with Ruby • Use SQLite for testing, Postrgres for Production by changing the gem "sqlite3" line in Gemfile • Update Bundle $ bundle install
    • Creating our Data Model & Scaffolding • Create scaffolding for Posts $ rails generate scaffold Post title:string body:text • Let’s look at some code!
    • Changing the Landing Page • Remove the static landing page $ rm public/index.html • Add a route for the landing page (in config/routes.rb) root :to => "posts#index"
    • Testing our App Locally • Create the database $ rake db:create • Run migrations $ rake db:migrate • Start the app $ rails server • Enter a new post
    • Deploying to Heroku • Create a new Git repo $ git init • Create a new Heroku app $ heroku create • Commit to repo & deploy $ git push heroku master • Run migrations on Heroku Postgres DB $ heroku run rake db:migrate
    • Developer Resources• Dev Center: https://devcenter.heroku.com/• Getting Started with Ruby: https://devcenter.heroku.com/articles/ruby• Getting Started with Rails 3.x: https://devcenter.heroku.com/articles/rails3• GitHub repo with today’s Blog example: https://github.com/sfckemp/sf13-blog-example
    • Coming Soon… Expected Publishing Date is February 15, 2013.