138 lines
No EOL
3 KiB
Ruby
138 lines
No EOL
3 KiB
Ruby
require 'rubygems'
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require 'couchrest'
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def show obj
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puts obj.inspect
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puts
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end
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CouchRest::Model.default_database = CouchRest.database!('couchrest-model-example')
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class Author < CouchRest::Model
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key_accessor :name
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def drink_scotch
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puts "... glug type glug ... I'm #{name} ... type glug glug ..."
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end
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end
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class Post < CouchRest::Model
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key_accessor :title, :body, :author
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cast :author, :as => 'Author'
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timestamps!
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end
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class Comment < CouchRest::Model
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cast :commenter, :as => 'Author'
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def post= post
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self["post_id"] = post.id
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end
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def post
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Post.get(self['post_id']) if self['post_id']
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end
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timestamps!
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end
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puts "Act I: CRUD"
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puts
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puts "(pause for dramatic effect)"
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puts
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sleep 2
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puts "Create an author."
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quentin = Author.new("name" => "Quentin Hazel")
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show quentin
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puts "Create a new post."
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post = Post.new(:title => "First Post", :body => "Lorem ipsum dolor sit amet, consectetur adipisicing elit...")
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show post
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puts "Add the author to the post."
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post.author = quentin
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show post
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puts "Save the post."
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post.save
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show post
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puts "Load the post."
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reloaded = Post.get(post.id)
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show reloaded
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puts "The author of the post is an instance of Author."
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reloaded.author.drink_scotch
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puts "\nAdd some comments to the post."
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comment_one = Comment.new :text => "Blah blah blah", :commenter => {:name => "Joe Sixpack"}
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comment_two = Comment.new :text => "Yeah yeah yeah", :commenter => {:name => "Jane Doe"}
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comment_three = Comment.new :text => "Whatever...", :commenter => {:name => "John Stewart"}
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# TODO - maybe add some magic here?
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comment_one.post = post
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comment_two.post = post
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comment_three.post = post
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comment_one.save
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comment_two.save
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comment_three.save
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show comment_one
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show comment_two
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show comment_three
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puts "We can load a post through its comment (no magic here)."
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show post = comment_one.post
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puts "Commenters are also authors."
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comment_two['commenter'].drink_scotch
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comment_one['commenter'].drink_scotch
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comment_three['commenter'].drink_scotch
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puts "\nLet's save an author to her own document."
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jane = comment_two['commenter']
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jane.save
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show jane
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puts "Oh, that's neat! Because Ruby passes hash valuee by reference, Jane's new id has been added to the comment she left."
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show comment_two
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puts "Of course, we'd better remember to save it."
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comment_two.save
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show comment_two
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puts "Oooh, denormalized... feel the burn!"
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puts
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puts
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puts
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puts "Act II: Views"
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puts
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puts
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sleep 2
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puts "Let's find all the comments that go with our post."
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puts "Our post has id #{post.id}, so lets find all the comments with that post_id."
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puts
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class Comment
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view_by :post_id
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end
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comments = Comment.by_post_id :key => post.id
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show comments
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puts "That was too easy."
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puts "We can even wrap it up in a finder on the Post class."
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puts
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class Post
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def comments
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Comment.by_post_id :key => id
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end
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end
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show post.comments
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puts "Gimme 5 minutes and I'll roll this into the framework. ;)"
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puts
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puts "There is a lot more that can be done with views, but a lot of the interesting stuff is joins, which of course range across types. We'll pick up where we left off, next time." |