Over the last week I've made improvements to Rhino, a Ruby ORM for
HBase that I created a while ago, and I now want to share it with this
list.
Post: http://qslack.com/2008/07/27/now-in-rhino/
Git: git clone git://github.com/sqs/rhino.git
Github: http://github.com/sqs/rhino/tree/master
Specs: http://github.com/sqs/rhino/tree/master/spec
I'd appreciate all the help and feedback I can get, from contributors,
users, and anyone who has strong feelings about this ORM design.
There's certainly a lot more work to be done.
Features
* Ruby
* Uses the Thrift API
* Basic get, put, scanning, deletion
* Has_many and belongs_to (within a single table, not between two
tables as in other ORMs)
* Constraints (a.k.a. validations)
* RSpec tests and decent docs
* Rudimentary Rails integration (other Ruby web frameworks would work
even better)
Here's an example of a Page model that has_many links. Page is the
table; Link consists of columns in the "link:" column family.
class Page < Rhino::Model
column_family :title
column_family :contents
column_family :links
column_family :meta
column_family :images
alias_attribute :author, 'meta:author'
has_many :links, Link
constraint(:title_required) { |page| page.title and !
page.title.empty? }
end
class Link < Rhino::Cell
belongs_to :page
# convert from com.example.www/path => www.example.com/path
def url
url_parts = key.split('/')
backwards_host = url_parts.shift
path = url_parts.join('/')
host = backwards_host.split('.').reverse.join('.')
"http://#{host}/#{path}";
end
end
# now the following code will work
page = Page.new('com.qslack.www', :title=>'My
Homepage', :contents=>'<p>Welcome</p>', :author=>'Quinn
Slack', :meta_language=>'en-US')
page.title # => 'My Homepage'
page.meta_language # => 'en-US' (from the meta:language column)
page.links.add('com.google.www/search', 'My Favorite Search Engine')
page.save
# later on...
page = Page.find('com.qslack.www')
goog_link = page.links.find('com.google.www/search')
goog_link.contents # => 'My Favorite Search Engine'
goog_link.url # => 'http://www.google.com/search'
goog_link.contents = 'My Second Favorite Search Engine'
goog_link.save
_____________
Quinn Slack
[EMAIL PROTECTED]
http://qslack.com
