Error when following Agile Web Development in RoR

I was originally using instant rails, and decided to try installing
ruby,
rails, and mysql on my own. No problem with the install. I used gem
install
rails --include-dependencies, and got no errors. The problem seems to be
with defining the scaffold method. I had no problems with this in
Instant
Rails, and i’m guessing this has something to do with Rails 2.0. Would
the
RoR gurus please lend a hand, and guide me to the light?

thanks,

Jason

NoMethodError in AdminController#index
undefined method `scaffold’ for AdminController:Class

RAILS_ROOT: /Users/jason/rails/depot
Application Trace http://localhost:3000/admin# | Framework
Trace
http://localhost:3000/admin#
| Full Trace http://localhost:3000/admin#
app/controllers/admin_controller.rb:2

If I’m not mistaken, the issue you’re having is due to the fact that
scaffolding has been deprecated as of Rails 2.0. If that’s the case,
it might be a bit hard for a Rails newbie to follow along with AWDwR.

I’m pretty n00b-ish myself, so am I totally wrong about this? If I’m
not, does anyone out there have any suggestions for alternative
tutorials that don’t presuppose scaffolding?

On 12/9/07, [email protected] [email protected] wrote:

If I’m not mistaken, the issue you’re having is due to the fact that
scaffolding has been deprecated as of Rails 2.0. If that’s the case,
it might be a bit hard for a Rails newbie to follow along with AWDwR.

I’m pretty n00b-ish myself, so am I totally wrong about this? If I’m
not, does anyone out there have any suggestions for alternative
tutorials that don’t presuppose scaffolding?

I’m not sure deprecated is the right term, it (dynamic scaffolding as
opposed to generated scaffolds) has been moved out of the core and
into a plugin in Rails 2.0. Another thing which has been moved out of
core are db adapters for commercial databases like Oracle, and SQL
server, these are now separate gems.

For the most part Rails 2.0 is pretty compatible with 1.2.x, however,
it’s probably different enough to trip up n00bs working through things
like AWDWR 2nd ed. I don’t know that there’s a really good in-depth
beginners tutorial on Rails 2.0 yet. I’d probably advise folks
starting out with Rails right now to install rails 1.2.x and use that
while following AWDWR.

If someone wants to persist in using AWDWR with Rails 2.0, one hint is
to check the plugin repository at
http://svn.rubyonrails.org/rails/plugins/ if you run into a missing
function like this.

The new book “The Rails Way” looks like a very good resource on Rails
2.0 for those with some rails experience under their belt, but it’s
really not structured as a beginner’s book.


Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/

I got the AWDWR 2nd ed for Xmas. I just ran into the “undefined method
`scaffold’ for AdminController:Class” error working on my “depoot”
example. I am running on OS X and installed Rails 2.0.2. Someone
suggested I use Rails 1.2. How do I back out 2.0 and go back to 1.2? I
installed it as a “package” on OS X. It installed in /usr/local/bin.
Do I just delete it? Can rails stand alone, or do I need all the
other stuff? Maybe the scaffold plug in is easier. Can someone explain
in detail how to add that plug in?

I’m a java developer w/Unix experience, so I’m not totally clueless,
but I am very new to Rails and Ruby.

Thanks!

Search for rails freeze command, use it to go back to version 1.2.6

Sent from my iPhone

Or just gem install rails -v=1.2.6 then specify RAILS_GEM_VERSION in
your
config/environment.rb.

On Dec 27, 2007 4:03 PM, Bcp [email protected] wrote:

example. I am running on OS X and installed Rails 2.0.2. Someone


Ryan B.
http://www.frozenplague.net
Feel free to add me to MSN and/or GTalk as this email.

On Dec 26, 2007, at 8:30 PM, alfredojahn wrote:

I’m a java developer w/Unix experience, so I’m not totally clueless,
but I am very new to Rails and Ruby.

The easiest way by far is to just download Locomotive. It’s self-
contained, and is removed simply by dragging its folder to the trash.
You’ll be up and running in about two minutes after your download
completes.

For even extra easiness, download MAMP as well, and have a self-
contained MySQL install as well.

Jason, I’ve found the same trouble installing ruby on rails on Windows.
I’ve tried to install the ruby plugin but failed. You need to do a few
little changes from the original rubyonrails.org website. Here is the
installation I did:

  1. install ruby from www.rubyonrails.org/down.
  2. Because ruby changes your path settings, open a NEW command prompt
    and
    install gems like is told on the www.rubyonrails.org/down website. In
    the
    new command prompt type “ruby setup.rb”.
  3. Install the correct rails with the scaffolding. If you already
    installed the
    latest rails 2.x then uninstall it with “gem uninstall rails”. Then
    do the
    rails install with version 1.2.6. Type
    “gem install rails --version 1.2.6 --include-dependencies”
  4. Looking at all the different directories, rails creates, I need the
    projec
    manager. After trying out several I found “Intype” which is very
    small and
    just do the needful in a nice view. Its still in beta and therefore
    its
    still free. Download from:
    http://intype.info/home/index.php”. You can download both the editor
    and
    the project manager (I’ve used rarzilla for the rar file).
  5. Download and install the freeware package of MySQL. I’m using the
    essentials
    package. You need to register though.
  6. Create your work direcory (I’m using c:\webserver\test). If you want
    to
    follow the “Hello” example from the Agile book then type:
    “rails Hello”
    cd into the “Hello” directory.
    Open the webserver with “ruby script/server”.
    Open the webpage with “http://localhost:3000” and check the
    “about your application’s environment” for the installed versions
    etcetera.

Wish you good luck

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