added an example codecast
This commit is contained in:
parent
f9de11c23f
commit
32bf8715e1
138
examples/model/example.rb
Normal file
138
examples/model/example.rb
Normal file
|
@ -0,0 +1,138 @@
|
||||||
|
require 'rubygems'
|
||||||
|
require 'couchrest'
|
||||||
|
|
||||||
|
def show obj
|
||||||
|
puts obj.inspect
|
||||||
|
puts
|
||||||
|
end
|
||||||
|
|
||||||
|
CouchRest::Model.default_database = CouchRest.database!('couchrest-model-example')
|
||||||
|
|
||||||
|
class Author < CouchRest::Model
|
||||||
|
key_accessor :name
|
||||||
|
def drink_scotch
|
||||||
|
puts "... glug type glug ... I'm #{name} ... type glug glug ..."
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
class Post < CouchRest::Model
|
||||||
|
key_accessor :title, :body, :author
|
||||||
|
|
||||||
|
cast :author, :as => 'Author'
|
||||||
|
|
||||||
|
timestamps!
|
||||||
|
end
|
||||||
|
|
||||||
|
class Comment < CouchRest::Model
|
||||||
|
cast :commenter, :as => 'Author'
|
||||||
|
|
||||||
|
def post= post
|
||||||
|
self["post_id"] = post.id
|
||||||
|
end
|
||||||
|
def post
|
||||||
|
Post.get(self['post_id']) if self['post_id']
|
||||||
|
end
|
||||||
|
|
||||||
|
timestamps!
|
||||||
|
end
|
||||||
|
|
||||||
|
puts "Act I: CRUD"
|
||||||
|
puts
|
||||||
|
puts "(pause for dramatic effect)"
|
||||||
|
puts
|
||||||
|
sleep 2
|
||||||
|
|
||||||
|
puts "Create an author."
|
||||||
|
quentin = Author.new("name" => "Quentin Hazel")
|
||||||
|
show quentin
|
||||||
|
|
||||||
|
puts "Create a new post."
|
||||||
|
post = Post.new(:title => "First Post", :body => "Lorem ipsum dolor sit amet, consectetur adipisicing elit...")
|
||||||
|
show post
|
||||||
|
|
||||||
|
puts "Add the author to the post."
|
||||||
|
post.author = quentin
|
||||||
|
show post
|
||||||
|
|
||||||
|
puts "Save the post."
|
||||||
|
post.save
|
||||||
|
show post
|
||||||
|
|
||||||
|
puts "Load the post."
|
||||||
|
reloaded = Post.get(post.id)
|
||||||
|
show reloaded
|
||||||
|
|
||||||
|
puts "The author of the post is an instance of Author."
|
||||||
|
reloaded.author.drink_scotch
|
||||||
|
|
||||||
|
puts "\nAdd some comments to the post."
|
||||||
|
comment_one = Comment.new :text => "Blah blah blah", :commenter => {:name => "Joe Sixpack"}
|
||||||
|
comment_two = Comment.new :text => "Yeah yeah yeah", :commenter => {:name => "Jane Doe"}
|
||||||
|
comment_three = Comment.new :text => "Whatever...", :commenter => {:name => "John Stewart"}
|
||||||
|
|
||||||
|
# TODO - maybe add some magic here?
|
||||||
|
comment_one.post = post
|
||||||
|
comment_two.post = post
|
||||||
|
comment_three.post = post
|
||||||
|
comment_one.save
|
||||||
|
comment_two.save
|
||||||
|
comment_three.save
|
||||||
|
|
||||||
|
show comment_one
|
||||||
|
show comment_two
|
||||||
|
show comment_three
|
||||||
|
|
||||||
|
puts "We can load a post through its comment (no magic here)."
|
||||||
|
show post = comment_one.post
|
||||||
|
|
||||||
|
puts "Commenters are also authors."
|
||||||
|
comment_two['commenter'].drink_scotch
|
||||||
|
comment_one['commenter'].drink_scotch
|
||||||
|
comment_three['commenter'].drink_scotch
|
||||||
|
|
||||||
|
puts "\nLet's save an author to her own document."
|
||||||
|
jane = comment_two['commenter']
|
||||||
|
jane.save
|
||||||
|
show jane
|
||||||
|
|
||||||
|
puts "Oh, that's neat! Because Ruby passes hash valuee by reference, Jane's new id has been added to the comment she left."
|
||||||
|
show comment_two
|
||||||
|
|
||||||
|
puts "Of course, we'd better remember to save it."
|
||||||
|
comment_two.save
|
||||||
|
show comment_two
|
||||||
|
|
||||||
|
puts "Oooh, denormalized... feel the burn!"
|
||||||
|
puts
|
||||||
|
puts
|
||||||
|
puts
|
||||||
|
puts "Act II: Views"
|
||||||
|
puts
|
||||||
|
puts
|
||||||
|
sleep 2
|
||||||
|
|
||||||
|
puts "Let's find all the comments that go with our post."
|
||||||
|
puts "Our post has id #{post.id}, so lets find all the comments with that post_id."
|
||||||
|
puts
|
||||||
|
|
||||||
|
class Comment
|
||||||
|
view_by :post_id
|
||||||
|
end
|
||||||
|
|
||||||
|
comments = Comment.by_post_id :key => post.id
|
||||||
|
show comments
|
||||||
|
|
||||||
|
puts "That was too easy."
|
||||||
|
puts "We can even wrap it up in a finder on the Post class."
|
||||||
|
puts
|
||||||
|
|
||||||
|
class Post
|
||||||
|
def comments
|
||||||
|
Comment.by_post_id :key => id
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
show post.comments
|
||||||
|
puts "Gimme 5 minutes and I'll roll this into the framework. ;)"
|
||||||
|
puts
|
||||||
|
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."
|
Loading…
Reference in a new issue