Uninitialized constant error after scaffold on new Windows X

Rails
#1

I am attempting to get a working Rails programming environment setup
working
under XP with MySQL, RadRails and Webrick. I have been using my
PowerBook
but need to working on Windows environment too.

I have basic functions of Ruby and Rails going. I created a really
simple
table and generated the scaffolding. The server starts just fine. I can
browse the database succesfully in RadRails. The issue is this error
when I
attempt to run the program.

I have been looking at this for several hours now and am running out of
ideas.

(1) Do you recognize this error and have any suggestions. I am running a
completely vanilla scaffold.

(2) My MySQL table has just two colums one is an interger and one is a
medium text field. Are there some MySQL datatypes that are not
compatible
with Rails?

Thanks!

====================================

uninitialized constant Slip

RAILS_ROOT: ./script/…/config/…
Application Trace http://localhost:3000/admin# | Framework
Tracehttp://localhost:3000/admin#| Full
Trace http://localhost:3000/admin#

c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
const_missing' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:inconst_missing’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
module_eval' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:inmodule_eval’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
constantize' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:inconstantize’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
paginator_and_collection_for' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:inpaginate’
#{RAILS_ROOT}/app/controllers/admin_controller.rb:12:in list' #{RAILS_ROOT}/app/controllers/admin_controller.rb:3:inindex’
-e:4:in `load’
-e:4

c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
const_missing' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:inconst_missing’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
module_eval' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:inmodule_eval’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
constantize' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:inconstantize’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
paginator_and_collection_for' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:inpaginate’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in
send' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:inperform_action_without_filters’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in
perform_action_without_benchmark' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:inperform_action_without_rescue’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
measure' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:inperform_action_without_rescue’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in
perform_action' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:insend’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in
process_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:inprocess_without_session_management_support’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in
process' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:indispatch’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in
handle_dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:inservice’
c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:inrun’
c:/ruby/lib/ruby/1.8/webrick/server.rb:155:in start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:144:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:144:in start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:94:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:89:in each' c:/ruby/lib/ruby/1.8/webrick/server.rb:89:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:79:in start' c:/ruby/lib/ruby/1.8/webrick/server.rb:79:instart’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in
dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:inrequire__’
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in
require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in
require__' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require’
script/server:3

c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
const_missing' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:inconst_missing’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
module_eval' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:inmodule_eval’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
constantize' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:inconstantize’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
paginator_and_collection_for' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:inpaginate’
#{RAILS_ROOT}/app/controllers/admin_controller.rb:12:in list' #{RAILS_ROOT}/app/controllers/admin_controller.rb:3:inindex’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in
send' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:inperform_action_without_filters’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in
perform_action_without_benchmark' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:inperform_action_without_rescue’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
measure' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:inperform_action_without_rescue’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in
perform_action' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:insend’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in
process_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:inprocess_without_session_management_support’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in
process' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:indispatch’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in
handle_dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:inservice’
c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:inrun’
c:/ruby/lib/ruby/1.8/webrick/server.rb:155:in start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:144:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:144:in start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:94:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:89:in each' c:/ruby/lib/ruby/1.8/webrick/server.rb:89:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:79:in start' c:/ruby/lib/ruby/1.8/webrick/server.rb:79:instart’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in
dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:inrequire__’
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in
require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in
require__' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
require' script/server:3 -e:4:inload’
-e:4

This error occured while loading the following files:
slip.rb

#2

When you see that message, it usually means your model couldn’t be
loaded
due to syntax problems or something of that nature.

Notice the message at the end of the stack trace…

This error occured while loading the following files:
slip.rb

Have a look in your model for any syntax issues. If you’re stuck, paste
the
code and I’m sure someone can help. This doesn’t seem like a Windows
issue
to me.

#3

When you see that message, it usually means your model couldn’t be loaded
due to syntax problems or something of that nature.

Thanks for the quick response. Is the something wrong with naming the
model
“Slips”

My model is simply scaffold code:

class Slips < ActiveRecord::Base
end

The controller is scaffold as well:

class AdminController < ApplicationController
def index
list
render :action => ‘list’
end

GETs should be safe (see

http://www.w3.org/2001/tag/doc/whenToUseGet.html)
verify :method => :post, :only => [ :destroy, :create, :update ],
:redirect_to => { :action => :list }

def list
@slips_pages, @slips = paginate :slips, :per_page => 10
end

def show
@slips = Slips.find(params[:id])
end

def new
@slips = Slips.new
end

def create
@slips = Slips.new(params[:slips])
if @slips.save
flash[:notice] = ‘Slips was successfully created.’
redirect_to :action => ‘list’
else
render :action => ‘new’
end
end

def edit
@slips = Slips.find(params[:id])
end

def update
@slips = Slips.find(params[:id])
if @slips.update_attributes(params[:slips])
flash[:notice] = ‘Slips was successfully updated.’
redirect_to :action => ‘show’, :id => @slips
else
render :action => ‘edit’
end
end

def destroy
Slips.find(params[:id]).destroy
redirect_to :action => ‘list’
end
end

#4

Thanks for the quick response. Is the something wrong with naming the
model
“Slips”

Kind of :slight_smile:

Rails convention is singular classname and plural tablename. The DB
table would be called ‘slips’, the model class should be called Slip.

Very basic mistake on my part!

Thank you so much, this solved my problem, I am Rolling on Windows!

#5

Bill Edstrom, Jr. wrote:

When you see that message, it usually means your model couldn’t be loaded
due to syntax problems or something of that nature.

Thanks for the quick response. Is the something wrong with naming the
model
“Slips”

Kind of :slight_smile:

Rails convention is singular classname and plural tablename. The DB
table would be called ‘slips’, the model class should be called Slip.

Alan

#6

Bill Edstrom, Jr. wrote:

Is the something wrong with naming the model “Slips”

Yes.

One of the fundamental RoR conventions is that table names are plurals
of
the model names. That’s because, in the AR pattern, models are an
instance
(singular) of a collection of objects (plural) that are stored in
tables.
So if you have a ‘slip’ object (model) it will be stored in a table
named
‘slips’. Convention over configuration. Makes sense, no?

hth,
Bill