Hi all,
I've been working with my RESTful Rails controller on a real project
since I posted about it back in mid November:
http://microformats.org/discuss/mail/microformats-rest/2005-
November/000042.html
I got some really good feedback from Peter Williams and I decided to
integrate some of the ideas he came up with:
http://pezra.barelyenough.org/blog/2006/01/rough-resting-on-rails/
Here's an example controller made with my latest (soon-to-be-released)
RestController:
class BookController < RestController
before_filter :load_books, :only => :collection
before_filter :load_book, :only => :entity
resource_for :new do
get(:cache_as => :public, :for => 1.hour) do
@book = Book.new
conditions << @book # set the ETag and Last-Modified from
the @book's lock_version and modified_at attributes
end
end
resource_for :collection do
get(:cache_as => :public, :for => 10.minutes)
post do
@book = @books.build(params[:book])
if @book.save
render_post_success :action => 'show', :id => @book
else
render :action => 'new', :status => HTTP_BAD_REQUEST
end
end
end
resource_for :entity do
get(:cache_as => :public, :for => 10.minutes)
put do
@book.attributes = params[:book]
begin
Book.transaction do
@book.save!
conditions << @book
test_conditions!
end
render_put_success
rescue ActiveRecord::ActiveRecordError
render :status => HTTP_BAD_REQUEST
end
end
delete do
if meets_conditions? and @book.destroy
render_delete_success :id => nil
else
render :status => HTTP_BAD_REQUEST
end
end
end
private
def load_books
@book_pages, @books = paginate :book, :per_page => 20
conditions << @books
end
def load_book
@book = Book.find(params[:id])
conditions << @book
end
end
The way the per-HTTP method handlers are defined has been changed
slightly, but it allows extra meta-data to be passed in when the
handler is being defined. In the example above I'm using this to
define the Cache-Control/Expires headers that are set after the
GET request is handled -- you could also do this for PUT, POST and
other methods too. (although I haven't personally hit a situation
where I wanted to do that)
If you read through Peter's blog entry and comments you'll see
there are a few extra things I wanted to experiment with before I
release the next version of the RestController. Even so I wanted
to provide this example and see if I could get some more constructive
feedback first.
--
Thanks,
Dan
__________________________________________________________________
Dan Kubb Email: [EMAIL PROTECTED]
Autopilot Marketing Inc. Phone: 1 (604) 820-0212
Web: http://www.autopilotmarketing.com
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