Rails - Jan 2009 - ActiveRecord: Can't store a class derived from AR::Base

Hi,

try to use ActiveRecord for my little standalone application, without 
the rails environment. Here is my first try

8<--------------------------------------------------

# Main
if __FILE__ == $0 then

   ActiveRecord::Base.establish_connection(
     :adapter =>  ''mysql'',
     :host => @config[:sql][:hostname],
     :database => @config[:sql][:database],
     :username => @config[:sql][:username],
     :password => @config[:sql][:password]
   )

   puts ''Erzeuge ein paar Knoten und speicher diese in der DB:
''

   80.times do |i|
     aNode = Node.new("node_#{i}",1)
     print ''.''
     aNode.save!
   end

end

8<--------------------------------------------------

@config is well initialized, the ActiveRecord connects to my DB as 
you''ll expected. But the call aNode.save! fails with this error:

Erzeuge ein paar Knoten und speicher diese in der DB:
.c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/transactions.rb:164:in
`rollback_active_record_state!'': undefined method `delete'' for
nil:NilClass (NoMethodError)
         from 
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/transactions.rb:150:in
`save!''
         from main.rb:35
         from main.rb:32:in `times''
         from main.rb:32

Mmm, but I have looked in transactions.rb at line 150 and 164, looks 
fine for me. My AR gems are

D:\ramantics>gem list --local

*** LOCAL GEMS ***

actionmailer (2.2.2)
actionpack (2.2.2)
activerecord (2.2.2)
activeresource (2.2.2)
activesupport (2.2.2)
fxri (0.3.7, 0.3.6)
fxruby (1.6.17, 1.6.6)
hpricot (0.6.164, 0.4)
log4r (1.0.5)
mysql (2.7.3)
ptools (1.1.6)
rails (2.2.2)
rake (0.8.3, 0.7.2)
rubygems-update (1.3.1)
sources (0.0.1)
test-unit (2.0.2)
win32-api (1.2.2)
win32-clipboard (0.4.4, 0.4.1)
win32-dir (0.3.2, 0.3.1)
win32-eventlog (0.5.0, 0.4.3)
win32-file (0.6.0, 0.5.3)
win32-file-stat (1.3.2, 1.2.3)
win32-process (0.6.0, 0.5.1)
win32-sapi (0.1.4, 0.1.3)
win32-sound (0.4.1, 0.4.0)
windows-api (0.2.4)
windows-pr (0.9.8, 0.6.2)

Has anyone an idea where I made the mistake? Thanks a lot.

g,

Daniel


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On Jan 9, 9:26 pm, Daniel Völkerts
<d...-XM+ZIY/z7BcOIzVOb1FTxg@public.gmane.org> wrote:
> Has anyone an idea where I made the mistake? Thanks a lot.
Have you override initialize in you Node class ?

Fred
>
> g,
>
> Daniel
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Frederick Cheung schrieb:
> Have you override initialize in you Node class ?
Hi Fred,


aaah yes. I already found the problem. As you mentioned, I overwrote 
initialize in my Node class which inherits AR::Base.

Damn I didn''t know that this isn''t allowed :( Fixed failures
lead to
better code *g*

Thanks for your response.

Daniel

-- 
“Das ich erkenne, was die Welt im Innersten zusammenhält” (Faust I)

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On 11 Jan 2009, at 11:33, Daniel Völkerts wrote:
>
> Frederick Cheung schrieb:
>
>> Have you override initialize in you Node class ?
>
> Hi Fred,
>
>
> aaah yes. I already found the problem. As you mentioned, I overwrote
> initialize in my Node class which inherits AR::Base.
>
> Damn I didn''t know that this isn''t allowed :( Fixed
failures lead to
> better code *g*
>
You can override initialize, but you just need to ensure you call the  
superclass implementation properly.

Fred
> Thanks for your response.
>
> Daniel
>
> -- 
> “Das ich erkenne, was die Welt im Innersten zusammenhält” (Faust I)
>
> >

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Frederick Cheung schrieb:
> You can override initialize, but you just need to ensure you call the  
> superclass implementation properly.
Oh, thanks for this additional information, I see I''ve to read the docs
,)

g,

Daniel

-- 
“Das ich erkenne, was die Welt im Innersten zusammenhält” (Faust I)

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