From: George  Moschovitis <george.moschovitis@...>
Date: 2005-01-12T22:06:17+09:00
Subject: [ANN] Nitro + Og 0.8.0

Hello everyone,

new versions of Nitro and Og were just released.

Homepage: http://www.navel.gr/nitro
Download: http://www.rubyforge.com/projects/nitro

A snapshot of the latest code. Cool new features,
many fixes and improvements in older features. Many thanks
to Michael Neumann for giving intelligent suggestions
and finding small bugs.

Most notable additions:

* New automatic validation system:

class User
prop_accessor :name, :password, String
validate_confirmation :password
validate_length :name, :range => 2..12
end

u = User.new(...)
unless u.valid?
p u.errors.on(:name)
p u.errors[:password]
end

* Programmatic xhtml rendering. This is an alternative
method of rendering that is usefull in building
components and helpers. This is a preview implementation.

options = ['Male', 'Female']
o.select(:name => 'sex') {
o.options(options, selected = 1)
}

options = { 'Male' => 'm', 'Female' => 'f' }
o.select(:name => 'sex') {
o.options(options, selected = 1)
}

o.html {
o.p(:class => 'header') { o.b('Hello') }
}

* No global variables in Og.

* Recoded Og to allow for future support of multiple databases
(even on different RDBMS systems) on a single application.

* Improved Blog example demonstrates latest advancements.
(You have to drop the database of earlier versions!)
* More unit tests.

* Supports Ruby 1.8.2

* Integrated extensions/dev-utils by Gavin Sinclair.

* Integrated blankslate by Jim Weirich.

* And many IMPORTANT bug fixes.

Nitro is an efficient, yet simple engine for developing professional
Web Applications using the Ruby language. Nitro aims to provide a
robust infrastructure for scalable web applications that can be
distributed over a server cluster. However, Nitro can also power simple
web applications for deployment on intranets or even personal
computers. Nitro integrates the powerful Og Object-Relational mapping
library.

Nitro is a multiparadigm application framework and will integrate ideas
from Rails, Wee, PHP, JSP and .NET

Nitro integrates the Og (ObjectGraph) object-relational mapping
library. Og provides transparent serialization of object graphs to a
RDBMS backend. Unlike other similar libraries Og maps standard Ruby
objects to SQL tables and not vice versa. Og provides a meta language
to describe the relations between objects, a flexible and intuitive api
for querieng the database, raw access to the SQL language if needed
(for example to fine tune the automatically generated SQL tables, or
for custom queries), suports deserialization to Ruby objects or tuples,
automatically generates join tables for many_to_many relations
and provides a collection of usefull Mixins to synthesize common
Entities.

Og is a combination of the best features of Active Record and the
former O-R mapping library included in Nitro (NDB). Adapters for
PostgreSQL and MySQL are included.

I would really appreciate your suggestions, ideas and bug reports. I
hope this software will be useful for you.

have fun,
George Moschovitis