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Dan Bikle

2006-Aug-04 03:43 UTC

[Rails] Demo in rails2.pdf of add_price migration, PostgreSQL 8.1.4

People,

I''m looking at the migrate example on p 74 of the rails2.pdf

It''s a simple example of using a migration to add a column to
the products table.

Here is a copy of the migration file named 002_add_price.rb
after I generated and then edited it:

class AddPrice < ActiveRecord::Migration
  def self.up
    add_column :products, :price, :decimal, :precision => 8, :scale => 2,
:default => 0
  end

  def self.down
    remove_column :products, :price
  end
end


I see this error when I walk through the demo:


bash mac maco /pt/books/rails2_my_depot/depot 9 $
bash mac maco /pt/books/rails2_my_depot/depot 9 $ rake db:migrate --trace
(in /pt/books/rails2_my_depot/depot)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
== AddPrice: migrating
=======================================================-- add_column(:products,
:price, :decimal, {:precision=>8, :scale=>2,
:default=>0})
rake aborted!
You have a nil object when you didn''t expect it!
You might have expected an instance of Array.
The error occured while evaluating nil.[]
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/connection_adapters/abstract/schema_statements.rb:259:in
`type_to_sql''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/connection_adapters/postgresql_adapter.rb:310:in
`add_column''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:272:in
`method_missing''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:256:in
`say_with_time''
/r/lib/ruby/1.8/benchmark.rb:293:in `measure''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:256:in
`say_with_time''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:270:in
`method_missing''
./db/migrate//002_add_price.rb:3:in `real_up''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:210:in
`migrate''
/r/lib/ruby/1.8/benchmark.rb:293:in `measure''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:210:in
`migrate''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:332:in
`migrate''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:327:in
`migrate''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:294:in
`up''
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:285:in
`migrate''
/r/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/tasks/databases.rake:4
/r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `execute''
/r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `execute''
/r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:357:in `invoke''
/r/lib/ruby/1.8/thread.rb:135:in `synchronize''
/r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in `invoke''
/r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in `run''
/r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in `run''
/r/lib/ruby/gems/1.8/gems/rake-0.7.1/bin/rake:7
/r/bin/rake:18
bash mac maco /pt/books/rails2_my_depot/depot 10 $
bash mac maco /pt/books/rails2_my_depot/depot 10 $
bash mac maco /pt/books/rails2_my_depot/depot 10 $

Info about my setup:

bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $ uname -a
Darwin mac 8.7.0 Darwin Kernel Version 8.7.0: Fri May 26 15:20:53 PDT 2006;
root:xnu-792.6.76.obj~1/RELEASE_PPC Power Macintosh powerpc
bash mac maco /pt/books/rails2_my_depot/depot 13 $
bash mac maco /pt/books/rails2_my_depot/depot 13 $
bash mac maco /pt/books/rails2_my_depot/depot 13 $
[ os x 10.4 ]


bash mac maco /pt/books/rails2_my_depot/depot 19 $
bash mac maco /pt/books/rails2_my_depot/depot 19 $
bash mac maco /pt/books/rails2_my_depot/depot 19 $
bash mac maco /pt/books/rails2_my_depot/depot 19 $ psql depot_development
Welcome to psql 8.1.4, the PostgreSQL interactive terminal.


bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 11 $ gem list --local

*** LOCAL GEMS ***

actionmailer (1.2.3)
    Service layer for easy email delivery and testing.

actionpack (1.12.3)
    Web-flow and rendering framework putting the VC in MVC.

actionwebservice (1.1.4)
    Web service support for Action Pack.

activerecord (1.14.3)
    Implements the ActiveRecord pattern for ORM.

activesupport (1.3.1)
    Support and utility classes used by the Rails framework.

postgres (0.7.1)
    The extension library to access a PostgreSQL database from Ruby.

rails (1.1.4)
    Web-application framework with template engine, control-flow layer,
    and ORM.

rake (0.7.1)
    Ruby based make-like utility.

sources (0.0.1)
    This package provides download sources for remote gem installation
bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $
bash mac maco /pt/books/rails2_my_depot/depot 12 $


Anyone have any clues on how I can get this to work?

Thanks,

-Dan
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Dan Bikle

2006-Aug-04 04:16 UTC

head link

[Rails] Demo in rails2.pdf of add_price migration, PostgreSQL 8.1.4

Well,

I ran a simple experiment where I tried adding a column with data type of
string
rather than decimal and it worked well.

Then, I ran another experiment where I tried creating a table with a column
with
data type of decimal and it succeeded:


bash mac maco /pt/books/rails2_my_depot/depot 18 $
bash mac maco /pt/books/rails2_my_depot/depot 18 $
bash mac maco /pt/books/rails2_my_depot/depot 18 $ script/generate model
testdecimal
      exists  app/models/
      exists  test/unit/
      exists  test/fixtures/
      create  app/models/testdecimal.rb
      create  test/unit/testdecimal_test.rb
      create  test/fixtures/testdecimals.yml
      exists  db/migrate
      create  db/migrate/003_create_testdecimals.rb
bash mac maco /pt/books/rails2_my_depot/depot 19 $
bash mac maco /pt/books/rails2_my_depot/depot 19 $ vi
db/migrate/003_create_testdecimals.rb


bash mac maco /pt/books/rails2_my_depot/depot 20 $
bash mac maco /pt/books/rails2_my_depot/depot 20 $ cat
db/migrate/003_create_testdecimals.rb
class CreateTestdecimals < ActiveRecord::Migration
  def self.up
    create_table :testdecimals do |t|
      t.column :dec1, :decimal
    end
  end

  def self.down
    drop_table :testdecimals
  end
end
bash mac maco /pt/books/rails2_my_depot/depot 21 $
bash mac maco /pt/books/rails2_my_depot/depot 21 $
bash mac maco /pt/books/rails2_my_depot/depot 21 $



bash mac maco /pt/books/rails2_my_depot/depot 21 $
bash mac maco /pt/books/rails2_my_depot/depot 21 $
bash mac maco /pt/books/rails2_my_depot/depot 21 $ rake db:migrate
(in /pt/books/rails2_my_depot/depot)
== CreateTestdecimals: migrating
=============================================-- create_table(:testdecimals)
NOTICE:  CREATE TABLE will create implicit sequence
"testdecimals_id_seq"
for serial column "testdecimals.id"
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index
"testdecimals_pkey" for table "testdecimals"
   -> 0.2935s
== CreateTestdecimals: migrated (0.2939s)
====================================
bash mac maco /pt/books/rails2_my_depot/depot 22 $
bash mac maco /pt/books/rails2_my_depot/depot 22 $



depot_development=#
depot_development=#
depot_development=#
depot_development=# \d testdecimals
\d testdecimals
                         Table "public.testdecimals"
 Column |  Type   |
Modifiers
--------+---------+-----------------------------------------------------------
 id     | integer | not null default
nextval(''testdecimals_id_seq''::regclass)
 dec1   | numeric |
Indexes:
    "testdecimals_pkey" PRIMARY KEY, btree (id)

depot_development=#
depot_development=#
depot_development=#


So, it looks like my problem is isolated to the situation where
I want to add a column with data type of decimal to a table.

The migration works okay if the decimal data type resides in a
create_table() method.

-Dan


On 8/3/06, Dan Bikle <dan.bikle@gmail.com> wrote:>
> People,
>
> I''m looking at the migrate example on p 74 of the rails2.pdf
>
> It''s a simple example of using a migration to add a column to
> the products table.
>
> Here is a copy of the migration file named 002_add_price.rb
> after I generated and then edited it:
>
> class AddPrice < ActiveRecord::Migration
>   def self.up
>     add_column :products, :price, :decimal, :precision => 8, :scale
=> 2,
> :default => 0
>   end
>
>   def self.down
>     remove_column :products, :price
>   end
> end
>
>
> I see this error when I walk through the demo:
>
>
> bash mac maco /pt/books/rails2_my_depot/depot 9 $
> bash mac maco /pt/books/rails2_my_depot/depot 9 $ rake db:migrate --trace
> (in /pt/books/rails2_my_depot/depot)
> ** Invoke db:migrate (first_time)
> ** Invoke environment (first_time)
> ** Execute environment
> ** Execute db:migrate
> == AddPrice: migrating
> =======================================================> --
add_column(:products, :price, :decimal, {:precision=>8, :scale=>2,
> :default=>0})
> rake aborted!
> You have a nil object when you didn''t expect it!
> You might have expected an instance of Array.
> The error occured while evaluating nil.[]
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/connection_adapters/abstract/schema_statements.rb:259:in
> `type_to_sql''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/connection_adapters/postgresql_adapter.rb:310:in
> `add_column''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:272:in
> `method_missing''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:256:in
> `say_with_time''
> /r/lib/ruby/1.8/benchmark.rb:293:in `measure''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:256:in
> `say_with_time''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:270:in
> `method_missing''
> ./db/migrate//002_add_price.rb:3:in `real_up''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:210:in
> `migrate''
> /r/lib/ruby/1.8/benchmark.rb:293:in `measure''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:210:in
> `migrate''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:332:in
> `migrate''
> /r/lib/ruby/gems/1.8/gems/activerecord-
1.14.3/lib/active_record/migration.rb:327:in
> `migrate''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:294:in
> `up''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/migration.rb:285:in
> `migrate''
> /r/lib/ruby/gems/1.8/gems/rails-1.1.4/lib/tasks/databases.rake:4
> /r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `execute''
> /r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `execute''
> /r/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb:357:in `invoke''
> /r/lib/ruby/1.8/thread.rb:135:in `synchronize''
> /r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in `invoke''
> /r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in `run''
> /r/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in `run''
> /r/lib/ruby/gems/1.8/gems/rake-0.7.1/bin/rake:7
> /r/bin/rake:18
> bash mac maco /pt/books/rails2_my_depot/depot 10 $
> bash mac maco /pt/books/rails2_my_depot/depot 10 $
> bash mac maco /pt/books/rails2_my_depot/depot 10 $
>
> Info about my setup:
>
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $ uname -a
> Darwin mac 8.7.0 Darwin Kernel Version 8.7.0: Fri May 26 15:20:53 PDT
> 2006; root:xnu-792.6.76.obj~1/RELEASE_PPC Power Macintosh powerpc
> bash mac maco /pt/books/rails2_my_depot/depot 13 $
> bash mac maco /pt/books/rails2_my_depot/depot 13 $
> bash mac maco /pt/books/rails2_my_depot/depot 13 $
> [ os x 10.4 ]
>
>
> bash mac maco /pt/books/rails2_my_depot/depot 19 $
> bash mac maco /pt/books/rails2_my_depot/depot 19 $
> bash mac maco /pt/books/rails2_my_depot/depot 19 $
> bash mac maco /pt/books/rails2_my_depot/depot 19 $ psql depot_development
> Welcome to psql 8.1.4, the PostgreSQL interactive terminal.
>
>
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 11 $ gem list --local
>
> *** LOCAL GEMS ***
>
> actionmailer (1.2.3)
>     Service layer for easy email delivery and testing.
>
> actionpack (1.12.3)
>     Web-flow and rendering framework putting the VC in MVC.
>
> actionwebservice (1.1.4)
>     Web service support for Action Pack.
>
> activerecord (1.14.3)
>     Implements the ActiveRecord pattern for ORM.
>
> activesupport (1.3.1)
>     Support and utility classes used by the Rails framework.
>
> postgres (0.7.1)
>     The extension library to access a PostgreSQL database from Ruby.
>
> rails (1.1.4)
>     Web-application framework with template engine, control-flow layer,
>     and ORM.
>
> rake (0.7.1)
>     Ruby based make-like utility.
>
> sources (0.0.1)
>     This package provides download sources for remote gem installation
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
>
>
> Anyone have any clues on how I can get this to work?
>
> Thanks,
>
> -Dan
>
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jeanpierre@gmail.com

2006-Aug-04 05:53 UTC

head link

[Rails] Demo in rails2.pdf of add_price migration, PostgreSQL 8.1.4

On 8/3/06, Dan Bikle <dan.bikle@gmail.com> wrote:> Well,
>
> I ran a simple experiment where I tried adding a column with data type of
> string rather than decimal and it worked well.
>
> Then, I ran another experiment where I tried creating a table with a column
> with data type of decimal and it succeeded:

is that migration (the latest revision of Agile Web...) using
BigDecimal (as seen in edge rails)?

regards,
jean-pierre

Dan Bikle

2006-Aug-04 07:03 UTC

head link

[Rails] Demo in rails2.pdf of add_price migration, PostgreSQL 8.1.4

Nope,

I''m not using BigDecimal nor edge rails.

I used gem to install rails on July 29 so right now my rails is at
rails-1.1.4

-Dan


On 8/3/06, jeanpierre@gmail.com <jeanpierre@gmail.com>
wrote:>
> On 8/3/06, Dan Bikle <dan.bikle@gmail.com> wrote:
> > Well,
> >
> > I ran a simple experiment where I tried adding a column with data type
> of
> > string rather than decimal and it worked well.
> >
> > Then, I ran another experiment where I tried creating a table with a
> column
> > with data type of decimal and it succeeded:
>
>
> is that migration (the latest revision of Agile Web...) using
> BigDecimal (as seen in edge rails)?
>
> regards,
> jean-pierre
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
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jeanpierre@gmail.com

2006-Aug-04 16:35 UTC

head link

[Rails] Demo in rails2.pdf of add_price migration, PostgreSQL 8.1.4

On 8/4/06, Dan Bikle <dan.bikle@gmail.com> wrote:> Nope,
>
> I''m not using BigDecimal nor edge rails.
>
> I used gem to install rails on July 29 so right now my rails is at
> rails-1.1.4
precisely, i thought that the latest push of Agile Web... used the
BigDecimal support found in edge rails?

cheers,
jean-pierre

Asa Hopkins

2006-Aug-04 17:42 UTC

head link

[Rails] Re: Demo in rails2.pdf of add_price migration, PostgreSQL 8.

Dan,

My impression from previous posts and Dave Thomas''s comments when the
new version fo the beta book came out (haven''t tried it all myself) is
that the :decimal column in migrations, linked to the ruby BigDecimal
class, is a feature currently in Edge Rails, but not in Rails 1.1.4.
So, you can either wait for 1.2 or whenever it shows up in a release, or
freeze edge rails in your app.

Asa

Dan Bikle wrote:> People,
> 
> I''m looking at the migrate example on p 74 of the rails2.pdf
> 
> It''s a simple example of using a migration to add a column to
> the products table.
> 
> Here is a copy of the migration file named 002_add_price.rb
> after I generated and then edited it:
> 
> class AddPrice < ActiveRecord::Migration
>   def self.up
>     add_column :products, :price, :decimal, :precision => 8, :scale
=>
> 2,
> :default => 0
>   end
> 
>   def self.down
>     remove_column :products, :price
>   end
> end
> 
> 
> I see this error when I walk through the demo:
> 
> 
> bash mac maco /pt/books/rails2_my_depot/depot 9 $
> bash mac maco /pt/books/rails2_my_depot/depot 9 $ rake db:migrate 
> --trace
> (in /pt/books/rails2_my_depot/depot)
> ** Invoke db:migrate (first_time)
> ** Invoke environment (first_time)
> ** Execute environment
> ** Execute db:migrate
> == AddPrice: migrating
> =======================================================> --
add_column(:products, :price, :decimal, {:precision=>8, :scale=>2,
> :default=>0})
> rake aborted!
> You have a nil object when you didn''t expect it!
> You might have expected an instance of Array.
> The error occured while evaluating nil.[]
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/connection_adapters/abstract/schema_statements.rb:259:in
> `type_to_sql''
>
/r/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/connection_adapters/postgresql_adapter.rb:310:in
> `add_column''
> --snip--
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 12 $
> bash mac maco /pt/books/rails2_my_depot/depot 11 $ gem list --local
> 
> *** LOCAL GEMS ***
> 
> 
> rails (1.1.4)
>     Web-application framework with template engine, control-flow layer,
>     and ORM.
> 
-- 
Posted via http://www.ruby-forum.com/.

Dave Thomas

2006-Aug-05 05:17 UTC

head link

[Rails] Demo in rails2.pdf of add_price migration, PostgreSQL 8.1.4

On Aug 4, 2006, at 2:03 AM, Dan Bikle wrote:
> I''m not using BigDecimal nor edge rails.
>
> I used gem to install rails on July 29 so right now my rails is at  
> rails-1.1.4

You need to be running edge Rails in order to run these examples--the  
book is written in the anticipation of 1.2, which support BigDecimal  
for decimal columns. It''s a significant enough change that I wanted  
to roll it in now.

Regards

Dave Thomas
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Steve Downie

2006-Aug-05 22:21 UTC

head link

[Rails] Demo in AWDWR.pdf of add_price migration

I''m in the process of going through the beta version of AWDWR. I came
to
the example which uses ''BigDecimal'' and skipped ahead to
install Edge Rails.
I don''t know if this is a question for Dave Thomas or one of the Rails 
developers.

On page 236 of the beta version of the .pdf:

After successfully installing Subversion v. 1.1.4 (''make
check'' reports
all tests successful), when I attempt to run the command:

svn propset svn:externals \
"rails http://dev.rubyonrails.org/svn/rails/trunk" vendor

(yes, on  the same line, without the backslash)
I get the following response:

"svn: ''vendor'' is not a working copy"

I don''t know what I should replace the ''vendor'' tag
with. Please let me
know if there is a simple fix or what the tag that should replace the 
''vendor'' tag should be.
Thanks for the great book and the early look.

TIA for any and all responses.

-- Steve
Email: s dot d at comcast dot net

Michael Siebert

2006-Aug-06 08:53 UTC

head link

[Rails] Demo in AWDWR.pdf of add_price migration

this error can occur when your project is not in svn. either make it svn,
check it out and try again or just
svn co http://dev.rubyonrails.org/svn/rails/trunk vendor/rails
in your app directory. this checks out a working copy (if i remind the
syntax corectly, if not, see the svn docs and let me know)

2006/8/6, Steve Downie
<rails@maintenancemode.com>:>
> I''m in the process of going through the beta version of AWDWR. I
came to
> the example which uses ''BigDecimal'' and skipped ahead to
install Edge
> Rails.
> I don''t know if this is a question for Dave Thomas or one of the
Rails
> developers.
>
> On page 236 of the beta version of the .pdf:
>
> After successfully installing Subversion v. 1.1.4 (''make
check'' reports
> all tests successful), when I attempt to run the command:
>
> svn propset svn:externals \
> "rails http://dev.rubyonrails.org/svn/rails/trunk" vendor
>
> (yes, on  the same line, without the backslash)
> I get the following response:
>
> "svn: ''vendor'' is not a working copy"
>
> I don''t know what I should replace the ''vendor''
tag with. Please let me
> know if there is a simple fix or what the tag that should replace the
> ''vendor'' tag should be.
> Thanks for the great book and the early look.
>
> TIA for any and all responses.
>
> -- Steve
> Email: s dot d at comcast dot net
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>


-- 
Michael Siebert <info@siebert-wd.de>

www.stellar-legends.de - Weltraum-Browsergame im Alpha-Stadium
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