New to rails, trying to do a pretty vanilla test-run app.
Here’s the beginning of a log dump from the subject error (with a
little formatting for readability):
Processing PersonController#create (for 192.168.1.50 at 2007-07-20
10:19:55) [POST]
Session ID: 41bc1e6351c24a63c12f97354da28e08
Parameters: {“commit”=>“Create”,
“action”=>“create”,
“controller”=>“person”,
“person”=>{“first_name”=>“Fred”,
“last_name”=>“Flintstone”,
“email”=>“[email protected]”}}
Neither this nor the rest of the log is telling me much 
How do you go about troubleshooting something like this?
TIA!
/* ruby 1.8.6 + rails 1.2.3 on SuSE Linux if that matters…*/
Hassan S. ------------------------ [email protected]
Nothing there says anything about any error. What does the rest of the
dump say?
On 7/20/07, John R [email protected] wrote:
Nothing there says anything about any error. What does the rest of the
dump say?
OK, here’s the entire log sequence:
Processing PersonController#create (for 192.168.1.50 at 2007-07-20
10:19:55) [POST]
Session ID: 41bc1e6351c24a63c12f97354da28e08
Parameters: {“commit”=>“Create”, “action”=>“create”,
“controller”=>“person”, “person”=>{“first_name”=>“Fred”,
“last_name”=>“Flintstone”, “email”=>“[email protected]”}}
ArgumentError (wrong number of arguments (1 for 0)):
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/scaffolding.rb:128:in
initialize' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/scaffolding.rb:128:in new’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/scaffolding.rb:128:in
create' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1095:in send’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1095:in
perform_action_without_filters' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:632:in call_filter’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:638:in
call_filter' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:438:in call’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:637:in
call_filter' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:619:in perform_action_without_benchmark’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' /usr/local/ruby-1.8.6/lib/ruby/1.8/benchmark.rb:293:in measure’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/rescue.rb:83:in perform_action’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in
send' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in process_without_filters’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:624:in
process_without_session_management_support' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/session_management.rb:114:in process’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:330:in
process' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in dispatch’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:113:in
handle_dispatch' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:79:in service’
/usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/httpserver.rb:104:in
service' /usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/httpserver.rb:65:in run’
/usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:173:in
start_thread' /usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:162:in start’
/usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:162:in
start_thread' /usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:95:in start’
/usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:92:in each' /usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:92:in start’
/usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:23:in start' /usr/local/ruby-1.8.6/lib/ruby/1.8/webrick/server.rb:82:in start’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:63:in
dispatch' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/webrick.rb:59 /usr/local/ruby-1.8.6/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in gem_original_require’
/usr/local/ruby-1.8.6/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
require' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in require’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:342:in
new_constants_in' /usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in require’
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39
/usr/local/ruby-1.8.6/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_require' /usr/local/ruby-1.8.6/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in require’
script/server:3
Rendering
/usr/local/ruby-1.8.6/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/templates/rescues/layout.rhtml
(500 Internal Error)
/* and apologies for the unintended pasted content in the subject! */
Hassan S. ------------------------ [email protected]
On 7/20/07, Adam C. [email protected] wrote:
what’s the code in your create action?
Perhaps I’m confused by the tutorial I’m reading, but I thought this
was a built-in function delivered by ‘scaffold’.
/person/list works fine if I’ve manually entered person data in to the
DB, as does /person/destroy, but the default create action fails.
–
Hassan S. ------------------------ [email protected]
what’s the code in your create action?
Adam
On 7/20/07, Adam C. [email protected] wrote:
yeah the default scaffolding actions should work. I was trying to
figure out if you added any custom methods to your create method…
Since it looks like somewhere along the line, a method is being called
with a parameter, where it shouldn’t have one. What’s the address of
the tutorial you’re following?
http://www.onlamp.com/pub/a/onlamp/2005/01/20/rails.html?page=3
Note: I’m not following it exactly, more mapping it to my own little
trial app 
But the default /person/new page appears as it should, it’s just the
operation fails on submit.
–
Hassan S. ------------------------ [email protected]
yeah the default scaffolding actions should work. I was trying to
figure out if you added any custom methods to your create method…
Since it looks like somewhere along the line, a method is being called
with a parameter, where it shouldn’t have one. What’s the address of
the tutorial you’re following?
Adam
A little more info, and I’m more puzzled than ever 
Going back to step one in the tutorial , I realized I’d totally skipped
the
‘gem install mysql’ instruction. Unfortunately, that fails miserably,
but
that’s for a separate post.
However, the USD64K question is: how can my rudimentary app read
and update the DB without the driver, and then fail on trying to create
a new entry?
???
Hassan S. ------------------------ [email protected]
On 7/21/07, John R [email protected] wrote:
Well, that ‘gem intall mysql’ doesn’t install a driver, rather native
bindings for ruby. It’s totally an optional step
Thanks for clarifying that! So I can ignore that issue for now.
That ArgumentError is strange. I tried to do a few noobish things
myself and couldn’t replicate it. Have you written some of your own
actions in the PersonController?
I had, but removing them didn’t change anything.
Also, I assume that you’re doing the scaffolding by including the line
‘scaffold :person’ in the controller. Have you tried scaffolding the
other way? Try running the command ‘script/generate scaffold
yourController yourModel’.
I tried this on a fresh new Rails instance and noticed that the
controller
created for Person was ‘people_controller’, /not/ ‘person_controller’.
Maybe some conflict there? In any case, it works fine now using the
second scaffold method, so let me wade back in and see what else I
can break
At least I discovered Logger through this, but I’d be interested in any
pointers to general RoR troubleshooting tips/tricks/best practice.
Regardless, thanks for the help!
Hassan S. ------------------------ [email protected]
Well, that ‘gem intall mysql’ doesn’t install a driver, rather native
bindings for ruby. It’s totally an optional step, but it generally
speeds up db access.
That ArgumentError is strange. I tried to do a few noobish things
myself and couldn’t replicate it. Have you written some of your own
actions in the PersonController? If so, can we see the code for your
PersonController?
Also, I assume that you’re doing the scaffolding by including the line
‘scaffold :person’ in the controller. Have you tried scaffolding the
other way? Try running the command ‘script/generate scaffold
yourController yourModel’. Note: That’ll blow away your controller, so
back it up if there’s anything you might want later.
J
