Re: Beginner problem

felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Sun, 23 Dec 2007 01:17:16 -0000

Basically, with the new scaffold you should do something like this:

ruby script/generate scaffold Friend name:string

This will create the Model, the Controller and the Migration that will
create the columns you specified (in this case, name).

Then you just need to run rake db:migrate and thats it. Remember to
delete the table you have created before running the Migration. You
should always edit the Database trough Migrations.

The problem is that the new scaffold is now RESTful, and I bet the
tutorials you are looking at are not based on RESTful specs. Maybe you
should install Rails 1.2.6 and specify this version on environment.rb
so that you can play with the old scaffold...

Felipe

On Dec 22, 2:36 pm, Katie Kelly
<kellyka...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I forgot to add... I think you might be able to find some more
> information about the Rails 2/scaffold thing on this forum too.
>
> On Dec 22, 4:32 pm, Katie Kelly
<kellyka...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hello.
>
> > Unfortunately, I think the tutorial that you are working with is a bit
> > out of date.  I think you''ll probably run into trouble with
most of
> > the Rails tutorials out there right now if you''re using Rails
2.0.x
> > because scaffold has been deprecated.  If you Google for
''rails
> > scaffold deprecated'' or something similar you should be able
to find
> > some more information about it.
>
> > Katie
>
> > On Dec 22, 3:52 pm, Sean Foley
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> > wrote:
>
> > > Hey all you RoR experts/fanatics!
>
> > > Let me start by saying: If this is the wrong forum to post in, I
humbly
> > > apologize.
>
> > > I am not normally a forum junkie or anything, but after spending
4 days
> > > reading half a dozen different tutorials on Ruby on Rails and
trying to
> > > get a really tiny little application up and running, I have run
into a
> > > brick wall that I cannot get past and I am getting desperate for
help.
>
> > > The current tutorial I am working with
is:http://www-128.ibm.com/developerworks/library/l-rubyrails/index.html
>
> > > (Please let me re-emphasize here that I have read 5-6 different
> > > tutorials now. Please--for the love of God--do not refer me to
another
> > > tutorial. They aren''t working for me)
>
> > > From top to bottom, here is what I have done:
>
> > > (1) I am using my Macbook running Leopard. It has ruby
pre-installed and
> > > I have run the update rails gem. I also am using PostgreSQL
(rather than
> > > the MySQL that all of the tutorials use because I am more
familiar with
> > > PostgreSQL)
>
> > > (2) I created a database called "railstest01" in ~/db
> > >     export PGDATA=~/db/railstest01
> > >     initdb
> > >     createdb railstest01
> > >     psql railstest01
>
> > >     (then, inside psql, I just created a little test table...)
> > >     CREATE TABLE Friends (
> > >         id SERIAL NOT NULL,
> > >         name TEXT NOT NULL,
> > >         PRIMARY KEY (id)
> > >     );
>
> > >     INSERT INTO Friends (name) VALUES
(''Tiffie'');
> > >     INSERT INTO Friends (name) VALUES
(''Stephen'');
> > >     INSERT INTO Friends (name) VALUES (''Mike'');
> > >     ...
>
> > > (2) rails railstest01
>
> > > (3) I changed ~/railstest01/config/database.yml to be
>
> > > development:
> > >   adapter: postgresql
> > >   database: railstest01
> > >   host: localhost
> > >   username: postgres
> > >   password: 12345
> > >   timeout: 5000
>
> > > (Note: On the Macbook, I have to create a user called
"postgres" in
> > > order to use PostgreSQL--at least, that''s what I
read...)
>
> > > (4) ruby script/generate model friend
>
> > > (5) ruby script/generate controller friend
>
> > > (6) I changed ~/railstest01/app/controllers/friend_controller.rb
to be
>
> > > class FriendController < ApplicationController
> > >   model :friend
> > >   scaffold :friend
> > > end
>
> > > (7) ruby script/server
>
> > > (8) I then browsed to:http://localhost:3000/andsuccessfullysaw
the
> > > "Welcome Aboard! You''re riding Ruby on Rails!"
splash screen.
>
> > > (9) Lastly, I browsed tohttp://localhost:3000/friend/andwashoping
to
> > > see the screen that all the various tutorials told me I would see
that
> > > lets me edit the tiny little database.
>
> > > However... I have yet to be able to do that. I keep getting the
same
> > > error (both on my Macbook and on the domain I registered so that
I could
> > > play around with Ruby on Rails more publicly). Below is the
entire error
> > > I am getting.
>
> > > If someone could please help me clear up this issue, I would be
> > > extremely grateful. I am on break from the University and was
hoping to
> > > mess around with RoR and become a devoted junkie, but I am thus
far
> > > unable to even get my "foot in the door."
>
> > > --------------------------------
> > > THE ERROR
> > > --------------------------------
> > >  NoMethodError in FriendController#index
>
> > > undefined method `model'' for FriendController:Class
>
> > > RAILS_ROOT: /Users/postgres/ruby/railstest01
> > > Application Trace | Framework Trace | Full Trace
>
> > > app/controllers/friend_controller.rb:2
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in
> > > `load_without_new_constant_marking''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in
> > > `load_file''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in
> > > `new_constants_in''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:202:in
> > > `load_file''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:94:in
> > > `require_or_load''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:248:in
> > > `load_missing_constant''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:453:in
> > > `const_missing''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:465:in
> > > `const_missing''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/inflector.rb:257:in
> > > `constantize''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/core_ext/string/inflections.rb:148:in
> > > `constantize''
> > >
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1426:in
> > > `recognize''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in
> > > `load''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in
> > > `load''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in
> > > `new_constants_in''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in
> > > `load''
> > >
/Library/Ruby/Gems/1.8/gems/rails-2.0.2/lib/commands/servers/mongrel.rb:64
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in
> > > `require''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in
> > > `new_constants_in''
> > >
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in
> > > `require''
> > > /Library/Ruby/Gems/1.8/gems/rails-2.0.2/lib/commands/server.rb:39
>
> > >
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:170:in
> > > `handle_request''
> > >
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:in
> > > `dispatch''
> > >
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in
> > > `dispatch_cgi''
> > >
/Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in
> > > `dispatch''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:78:in
> > > `process''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:in
> > > `synchronize''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:in
> > > `process''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:618:in
> > > `process_client''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in
> > > `each''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in
> > > `process_client''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
> > > `run''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
> > > `initialize''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
> > > `new''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
> > > `run''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in
> > > `initialize''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in
> > > `new''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in
> > > `run''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:271:in
> > > `run''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in
> > > `each''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in
> > > `run''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:127:in
> > > `run''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/command.rb:211:in
> > > `run''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:243
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
> > > `gem_original_require''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
> > > `require''
> > >
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
> > > `gem_original_require''
>
> ...
>
> read more »
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