mongodb-ir-test.rb

# 15-minutes with IronRuby and MongoDB
# ------------------------------------
# Prerequisites:
#  1) Download and extract the IronRuby zip from http://ironruby.net/download to C:\ironruby-1.0v4
#	2) Add the C:\ironruby-1.0v4\bin folder of your IronRuby installation folder to your PATH system environment variable
#
#  3) Download and extract the MongoDB for Windows zip from http://www.mongodb.org/display/DOCS/Downloads to C:\MongoDB
#  4) Create a C:\data\db directory
#  5) Start the mongod.exe from the bin folder of your MongoDB installation folder
#
# ------------------------------------
#  6) Open a command prompt window
#  7) Install the MongoMapper ruby gem and its prerequisites: 
#			ir -S gem install mongo_mapper --no-rdoc --no-ri
#
#  8) Start IR from a command prompt
#  9) Type: require 'mongodb-ir-test.rb'
#  10) Review the output of the test and the code below and continue experimenting

require 'rubygems'
gem 'mongo', '= 1.0' #Using 1.0 since MongoMapper explicitly

%w(mongo mongo_mapper).each { | r | require r}

MongoMapper.connection = Mongo::Connection.new
MongoMapper.database = 'test'

class Widget
	include MongoMapper::Document
	
	key :code, String
	key :description, String
	key :price, Float
	
	validates_numericality_of :price
	validates_true_for :price, 
		:logic=> lambda { | x | (0.05..9999.99) === x.price }, 
		:message=>"must be in the following range: 0.05 to 9999.99"
end

puts "Create our first widget ..."
@w1=Widget.new(:code => 'A101', :description => '1/2 in. brass nut', :price => 0.15)
@w1.save
puts @w1.inspect

puts "We saved #{Widget.all.size} widgets so far ..."

puts "Create an invalid second widget"
@w2=Widget.new(:code => 'B101', :description => '1/2 in. brass bolt', :price => 0)
@w2.save
puts "Could not save this widget due to the following errors:"
puts @w2.errors.inspect

puts "Fix the price and re-save"
@w2.price = 0.2
@w2.save
puts @w2.inspect

puts "We now saved #{Widget.all.size} widgets so far ..."

puts "Query widgets costing less than $0.2 ..."
@ws = Widget.all :price.lt => 0.2
puts @ws.inspect
puts "Found #{@ws.size}"

#Enjoy!
# - Philippe(@techarch on Twitter) - http://blog.monnet-usa.com/