From: Bill Atkins <batkins57@...>
Date: 2005-01-13T12:58:40+09:00
Subject: Re: [ANN] Nitro + Og 0.8.0

This looks interesting, but is there any documentation on running the
examples?  I tried running the blog example (even though I couldn't
set up the database), and got this error (on Win32):

----
../../lib/og.rb:189:in `initialize': (eval):1:in `initialize': uninitialized con
stant Og::Database::MysqlBackend (NameError)
        from ./config.rb:55:in `eval'
        from ../../lib/og.rb:189:in `initialize'
        from ./config.rb:55:in `new'
        from ./config.rb:55
        from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in `re
quire__'
        from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in `re
quire'
        from app.rb:19
-----

I tried this with the database set to PostgreSQL and I got the error
there as well, except with PostgresqlBackend instead of MysqlBackend
(I don't have PostgreSQL installed).

So how do I get the example to connect to the database and what kind
of setup do I need to do to get the database ready for the example?

Bill

On Wed, 12 Jan 2005 22:06:17 +0900, George  Moschovitis
<george.moschovitis@gmail.com> wrote:
> 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
> 
> 


-- 
$stdout.sync = true
"Just another Ruby hacker.".each_byte do |b|
  ('a'..'z').step do|c|print c+"\b";sleep 0.007 end;print b.chr
end; print "\n"