Rails - Sep 2006 - Help with Transient Error involving constructor on ActiveRecord::Base

Hi,

I am encountering a strange problem where I am getting an exception in 
one of my controllers where the line is essentially:

@model = Model.new(params[:model])

I get the following exception:

A ArgumentError occurred in model#model_create:

  wrong number of arguments (1 for 0)
  [RAILS_ROOT]/app/controllers/model_controller.rb:80:in `initialize''

which is pretty strange because it only occurs sometimes, and I cannot 
reproduce it in development, just production.

I use an Apache 2.2.2 system with a pack of mongrels behind it.

ruby 1.8.4 (2005-12-24) [x86_64-linux]

These are the versions of my gems:
mongrel (0.3.13.3)
activerecord (1.14.4, 1.14.3)
rails (1.1.6, 1.1.5, 1.1.4)
actionpack (1.12.5, 1.12.4, 1.12.3)
activesupport (1.3.1)

I have tried it on my development machine (OS X) with Mongrel, but I 
cannot get it to reproduce.  Just on my production machine :-(

Any ideas?

Thanks,
Curtis


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On Mon, 2006-09-11 at 18:20 -0700, Curtis Spencer wrote:
> Hi,
> 
> I am encountering a strange problem where I am getting an exception in 
> one of my controllers where the line is essentially:
> 
> @model = Model.new(params[:model])
> 
> I get the following exception:
Most likely you can''t have a Model named Model since that''s
what Model
is already named:  Model.


-- 
Zed A. Shaw
http://www.zedshaw.com/
http://mongrel.rubyforge.org/
http://www.lingr.com/room/3yXhqKbfPy8 -- Come get help.


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Zed,

Haha, sorry I should have been more specific. That is not the real model 
name.  I was just making the question more generic, which inevitably 
caused confusion.  My bad...

@widget = Widget.new(params[:widget])

I only get the exception periodically...

-Curtis

Zed Shaw wrote:
> On Mon, 2006-09-11 at 18:20 -0700, Curtis Spencer wrote:
>> Hi,
>>
>> I am encountering a strange problem where I am getting an exception in 
>> one of my controllers where the line is essentially:
>>
>> @model = Model.new(params[:model])
>>
>> I get the following exception:
> 
> Most likely you can''t have a Model named Model since
that''s what Model
> is already named:  Model.
> 
> 

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Hash: SHA1

Curtis Spencer wrote:
> Zed,
> 
> Haha, sorry I should have been more specific. That is not the real model 
> name.  I was just making the question more generic, which inevitably 
> caused confusion.  My bad...
> 
> @widget = Widget.new(params[:widget])
> 
> I only get the exception periodically...
> 
Try to forcefully load your models in your environment.rb or in your controller.
I believe Rails will load them as needed, and
sometimes your controller code will call a model before it''s been
required.

Zach
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Curtis Spencer wrote:
> Zed,
> 
> Haha, sorry I should have been more specific. That is not the real model 
> name.  I was just making the question more generic, which inevitably 
> caused confusion.  My bad...
> 
> @widget = Widget.new(params[:widget])
> 
> I only get the exception periodically...
> 
> -Curtis
After doing some more late night testing, I wanted to add a few other 
things I noticed with the problem.

After a fresh restart of the mongrel processes, I cannot reproduce the 
constructor problem.  I did this late last night, and I thought 
everything was good, but in the morning I can continue to get the 
exceptions, so it is something that is occurring over a period of a few 
hours (probably of little or no activity on the site)?  Could it have to 
do with the database?

I have ActiveRecord::Base.verification_timeout = 14400, and I don''t 
notice any Mysql Connection gone away errors.

A ArgumentError occurred in prime#prime_create:

   wrong number of arguments (1 for 0)
   [RAILS_ROOT]/app/controllers/prime_controller.rb:80:in `initialize''

which is pretty strange because it only occurs sometimes, and I cannot
reproduce it in development, just production.

I will repost my environment here:

I use an Apache 2.2.2 system with a pack of mongrels behind it.

ruby 1.8.4 (2005-12-24) [x86_64-linux]

These are the versions of my gems:
mongrel (0.3.13.3)
activerecord (1.14.4, 1.14.3)
rails (1.1.6, 1.1.5, 1.1.4)
actionpack (1.12.5, 1.12.4, 1.12.3)
activesupport (1.3.1)


Is there some way I can find out what could be causing it.
As for my model it is called Prime.  The only other thing I can imagine 
is that something in the ruby world collides with it so that it would 
have a no argument constructor?

Thanks in advance for any help.

-Curtis

> 
> Zed Shaw wrote:
>> On Mon, 2006-09-11 at 18:20 -0700, Curtis Spencer wrote:
>>> Hi,
>>>
>>> I am encountering a strange problem where I am getting an exception
in
>>> one of my controllers where the line is essentially:
>>>
>>> @model = Model.new(params[:model])
>>>
>>> I get the following exception:
>> Most likely you can''t have a Model named Model since
that''s what Model
>> is already named:  Model.
>>
>>
> 
> 
> > 
> 

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> 
> Try to forcefully load your models in your environment.rb or in your
controller. I believe Rails will load them as needed, and
> sometimes your controller code will call a model before it''s been
required.
> 
Zach,

In my ApplicationController, I have a model call with all of the models 
I use in my sessions, including this model.

model :prime

Does the order matter in this call because I have :prime toward the end.

Although it seems as though the model is required because ruby knows 
about the symbol Prime, but it just throws the argument error on the 
constructor.

-Curtis
> Zach
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> 
> iD8DBQFFBu3gMyx0fW1d8G0RAmsBAJ42EP95ryrRg1/kLFinU3X2iETdIwCggZOg
> OAl9vDaNkkVo0bmllr3Kbw0> =p5Fo
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> 
> > 
> 

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On Tue, 2006-09-12 at 10:34 -0700, Curtis Spencer wrote:
> Curtis Spencer wrote:
> > Zed,
> > 
> > Haha, sorry I should have been more specific. That is not the real
model
> > name.  I was just making the question more generic, which inevitably 
> > caused confusion.  My bad...
> > 
> > @widget = Widget.new(params[:widget])
> > 
> > I only get the exception periodically...
> > 
> > -Curtis
> 
> After doing some more late night testing, I wanted to add a few other 
> things I noticed with the problem.
> 
> After a fresh restart of the mongrel processes, I cannot reproduce the 
> constructor problem.  I did this late last night, and I thought 
> everything was good, but in the morning I can continue to get the 
> exceptions, so it is something that is occurring over a period of a few 
> hours (probably of little or no activity on the site)?  Could it have to 
> do with the database?
> 
> I have ActiveRecord::Base.verification_timeout = 14400, and I
don''t
> notice any Mysql Connection gone away errors.
Oh, are you using the MySQL driver that came with Rails or the compiled
gem?  The driver that comes with rails has this problem when talking to
a MySQL 5.x database.


-- 
Zed A. Shaw
http://www.zedshaw.com/
http://mongrel.rubyforge.org/
http://www.lingr.com/room/3yXhqKbfPy8 -- Come get help.


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