FourThirds Sinatra RESTful Example

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This is an example of efficient use of views in Sinatra covering RESTful actions. This is a copy of my original post on GitHub. Data will retrieved and modified from a database using ORMs, I have a set of lessons and answers you can follow if you wish to learn more about this.

The basic layout of a Sinatra application is:

app.rb     #Contains Routes, Controller and ORM Models  #Contains Information for rack web server
db/data.db #The Database
public/    #Static non template data.
views/     #ERB, HAML etc web page templates
views/layout.erb #The default structural template applied to all ERB pages

Gem is Rubys package management system. They do not install automatically so you do need to install them first. Check what you already have by running:

$ gem list

I have (shortened list) versions:

activerecord (2.3.5)
activeresource (2.3.5)
activesupport (2.3.5)
sequel (3.8.0, 3.7.0)
sinatra (0.9.6, 0.9.4)
sqlite3-ruby (1.2.5)

For this example you will need:

gem install sequel
gem install activerecord
gem install sinatra
gem install sqlite3-ruby

To run this example you should be able to:

cd ~/your/local/code/dir
git clone 
cd FourThirds 
#Initialise SQLite3 Database
ruby init_db.rb
#Run app on Webrick access via
ruby app.rb

This should be accessible on