# Preparation
# Uninstall the will_paginate gem so that the audience can see what 'sudo rake gems:install' really does (this causes an error if the gem does not exist locally)
sudo gem uninstall mislav-will_paginate
# Ruby - Getting Started
# I started with ruby by learning the Rails framework. I come from the java world. I can tell you the java equivalent for what I'm showing in ruby.
# Any questions -> ask right away.
# In the next 20 minutes we'll learn some ruby by...
# creating a basic rails application
# generating scaffold code
# extend the generated code (with pagination)
# if time remaining -> deploy the app live
# If you want to get started with ruby/rails visit know.namics.com and type rails + windows for this tutorial
# In terminal
cd Desktop
rails ttalk-app
cd ttalk-app
script/generate scaffold patient name:string surname:string birthday:date weight:integer
rake db:migrate
script/server
# Open http://localhost:3000/patients
# Create a new patient and edit it. View all patients.
# Open directory in RubyMine
# Show db/migrate/*_create_patients.rb
# Rails is a MVC framework...
# Show app/models/patient.rb
# Show app/controllers/patients_controller.rb
# Show app/views/patients/index.html.erb
# Now we want to extend patients with pagination
script/console
Patient.create(:name => "Bob", :surname => "Barker", :birthday => 20.years.ago, :weight => 65)
20.times {
Patient.create(:name => "Bob", :surname => "Barker", :birthday => 20.years.ago, :weight => 65)
}
# Refresh the page in browser. Now I have my patients. Let's add the pagination.
# Won't do it by hand. That would be tiresome.
# Switch to Browser -> Google "ruby toobox" -> Open ruby toolbox site
# Navigate to "pagination" category
# Open "will_paginate" page
# Switch to RubyMine
# add will_paginate gem to environment.rb
config.gem 'mislav-will_paginate', :version => '~> 2.3.8', :lib => 'will_paginate', :source => 'http://gems.github.com'
# Switch to Terminal
gem list mislav
# gem needs to be installed locally. Ask rails to install all of the gems the project needs.
sudo rake gems:install
# Now we have it
gem list mislav
# Switch to RubyMine -> patient.rb -> Change call to Patient.all to ...
Patient.paginate :per_page => 5, :page => params[:page], :order => 'updated_at DESC'
# Start up server in IDE
# Switch to Browser and refresh -> Now only 5 patients are displayed
# Now we need to update the view so we can navigate through the pages.
# Switch to RubyMine -> index.html.erb -> Add pagination navigation
<%= will_paginate @patients %>
# Switch to Browser and refresh -> pagination navigation is displayed
# By changing only 3 lines of code we have full functioning pagination. Wow.
# Check time. If time remaining, show deployment to heroku
# Switch to Terminal
git init
touch .gitignore
touch .gems
# Copy following to .gitignore
.idea
*.iml
*.ipr
*.iws
.DS_Store
log/*.log
tmp/**/*
config/database.yml
db/*.sqlite3
db/schema.rb
# Copy following to .gems
mislav-will_paginate --version ">=2.3.8" --source "http://gems.github.com"
# Switch to Terminal
git add .
git commit -m "initial commit"
gem list hero
heroku create austinttalk
git push heroku master
heroku rake db:migrate
heroku console
20.times { Patient.create(:name => "Bob", :surname => "Barker", :birthday => 20.years.ago, :weight => 65) }
# Switch to Browser -> http://austinttalk.heroku.com
# Questions?