A pure ruby data modelling library which uses a YAML file for it's backend store.
This library is used for all the data on this very website. All the project information, tags, screenshot IDs etc are stored in a yaml-model backend.
A fully functional wiki demo using YAML Model and Sinatra has it's full source code here.
Similar Projects: to_xml, Fixed Width Structures, Remarkably
gem install yaml-modelrequire 'yaml-model' YAML_Model.filename = 'my-database.yaml' # Without this, nothing will be stored Person = Class.new( YAML_Model ) # Predefine for Post class Post < YAML_Model type :person, Person type :at, Time do |value| raise "Cannot be in the future!" if ( value - 10 > Time.now ) end type :subject, String type :public, [ TrueClass, FalseClass ] init :person, :at, :subject, :public end class Person < YAML_Model type :name, String do |name| raise "Invalid format for name" unless name =~ /^[A-Z][a-z]+$/ end init :name has :posts, Post end bob = Person.create( "Bob" ) mary = Person.create( "Mary" ) Post.create( bob, Time.now, "The art of Ruby", true ) Post.create( bob, Time.now, "Beautiful Ruby", true ) Post.create( bob, Time.now, "Secretly I love Mary", false ) Post.create( mary, Time.now, "Bob is awesome!", true ) Post.all.select{|n|n.public}.each do |post| puts "#{post.person.name}: #{post.subject}" end # => Bob: The art of Ruby # Bob: Beautiful Ruby # Mary: Bob is awesome!
The resulting file will contain the following:
--- :next_oid: 7 :data: Person: - &id001 !ruby/object:Person name: Bob id: 1 - &id002 !ruby/object:Person name: Mary id: 2 Post: - !ruby/object:Post person: *id001 at: 2011-01-27 17:26:52.999533 +02:00 subject: The art of Ruby public: true id: 3 - !ruby/object:Post person: *id001 at: 2011-01-27 17:26:53.000594 +02:00 subject: Beautiful Ruby public: true id: 4 - !ruby/object:Post person: *id001 at: 2011-01-27 17:26:53.001604 +02:00 subject: Secretly I love Mary public: false id: 5 - !ruby/object:Post person: *id002 at: 2011-01-27 17:26:53.002546 +02:00 subject: Bob is awesome! public: true
git clone git://github.com/clivecrous/yaml-model
cd yaml-model
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