Rails - Mar 2005 - Getting the class from an object passed to an observer give typeerror

I''m trying to get the class from an observer, for example:

class MyObserver < ActiveRecord::Observer

  observe contact, organization

  def after_save(record)
    @record_class = record.class
    # some other processing
 end

end

Being new to Ruby and Rails I''m a little unsure why I get a TypeError
of

can''t dump anonymous class Class

I have seen a discussion on this which leaves me a little blank ;)

http://www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/128531

any ideas on how to get this functionality working in some capactity
would be much appreciated.

Thank you,
Nicholas

I''m trying to get the class from an observer, for example:

class MyObserver < ActiveRecord::Observer

  observe contact, organization

  def after_save(record)
    @record_class = record.class
    # some other processing
 end

end

Being new to Ruby and Rails I''m a little unsure why I get a TypeError
of

can''t dump anonymous class Class

I have seen a discussion on this which leaves me a little blank ;)

http://www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/128531

any ideas on how to get this functionality working in some capactity
would be much appreciated.

Thank you,
Nicholas

In what file have you defined your observer? It seems like the observer 
class doesn''t have access to the class definitions in the rest of your 
Rails app.

-Lucas
http://www.rufy.com/

On Apr 4, 2005, at 9:47 AM, Nicholas Henry wrote:
> I''m trying to get the class from an observer, for example:
>
> class MyObserver < ActiveRecord::Observer
>
>   observe contact, organization
>
>   def after_save(record)
>     @record_class = record.class
>     # some other processing
>  end
>
> end
>
> Being new to Ruby and Rails I''m a little unsure why I get a
TypeError
> of
>
> can''t dump anonymous class Class
>
> I have seen a discussion on this which leaves me a little blank ;)
>
> http://www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/128531
>
> any ideas on how to get this functionality working in some capactity
> would be much appreciated.
>
> Thank you,
> Nicholas
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

I have followed the Hieraki example of creating a separate file for
the observer class and defined the observer in the controller, for
example:

# file my_observer.rb

class MyObserver < ActiveRecord::Observer

observe contact

 def after_save(record)
   @record_class = record.class
   # some other processing
end

end

---

# file contact_controller.rb

class ContactController < ApplicationController

  model :Contact
  observer: my_observer

# some more code

end

Also, I have done a breakpoint to inspect the local variable "record"
in the observer and it does return what I would expect with the right
class name. Also I did a record.methods which included all the methods
I would expect, including "class".

Cheers,
Nicholas


On Apr 4, 2005 1:16 PM, Lucas Carlson <rails-1eRuzFDw/cg@public.gmane.org>
wrote:
> In what file have you defined your observer? It seems like the observer
> class doesn''t have access to the class definitions in the rest of
your
> Rails app.
>
> -Lucas
> http://www.rufy.com/
>
> On Apr 4, 2005, at 9:47 AM, Nicholas Henry wrote:
>
> > I''m trying to get the class from an observer, for example:
> >
> > class MyObserver < ActiveRecord::Observer
> >
> >   observe contact, organization
> >
> >   def after_save(record)
> >     @record_class = record.class
> >     # some other processing
> >  end
> >
> > end
> >
> > Being new to Ruby and Rails I''m a little unsure why I get a
TypeError
> > of
> >
> > can''t dump anonymous class Class
> >
> > I have seen a discussion on this which leaves me a little blank ;)
> >
> > http://www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/128531
> >
> > any ideas on how to get this functionality working in some capactity
> > would be much appreciated.
> >
> > Thank you,
> > Nicholas
> > _______________________________________________
> > Rails mailing list
> > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
>
>

The observer method only works in a controller. You can also do 

MyObserver.instance

In config/environment.rb to make it work.

Chris

On Apr 5, 2005 11:21 PM, Nicholas Henry
<nicholas.henry-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I have followed the Hieraki example of creating a separate file for
> the observer class and defined the observer in the controller, for
> example:
> 
> # file my_observer.rb
> 
> class MyObserver < ActiveRecord::Observer
> 
> observe contact
> 
>  def after_save(record)
>    @record_class = record.class
>    # some other processing
> end
> 
> end
> 
> ---
> 
> # file contact_controller.rb
> 
> class ContactController < ApplicationController
> 
>   model :Contact
>   observer: my_observer
> 
> # some more code
> 
> end
> 
> Also, I have done a breakpoint to inspect the local variable
"record"
> in the observer and it does return what I would expect with the right
> class name. Also I did a record.methods which included all the methods
> I would expect, including "class".
> 
> Cheers,
> Nicholas
> 
> 
> On Apr 4, 2005 1:16 PM, Lucas Carlson
<rails-1eRuzFDw/cg@public.gmane.org> wrote:
> > In what file have you defined your observer? It seems like the
observer
> > class doesn''t have access to the class definitions in the
rest of your
> > Rails app.
> >
> > -Lucas
> > http://www.rufy.com/
> >
> > On Apr 4, 2005, at 9:47 AM, Nicholas Henry wrote:
> >
> > > I''m trying to get the class from an observer, for
example:
> > >
> > > class MyObserver < ActiveRecord::Observer
> > >
> > >   observe contact, organization
> > >
> > >   def after_save(record)
> > >     @record_class = record.class
> > >     # some other processing
> > >  end
> > >
> > > end
> > >
> > > Being new to Ruby and Rails I''m a little unsure why I
get a TypeError
> > > of
> > >
> > > can''t dump anonymous class Class
> > >
> > > I have seen a discussion on this which leaves me a little blank
;)
> > >
> > > http://www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/128531
> > >
> > > any ideas on how to get this functionality working in some
capactity
> > > would be much appreciated.
> > >
> > > Thank you,
> > > Nicholas
> > > _______________________________________________
> > > Rails mailing list
> > > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> >
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

As far as I know I do have it the controller. From my previous example:


class ContactController < ApplicationController

 model :Contact
 observer: my_observer

# some more code

end

On Apr 5, 2005 6:49 PM, Chris McGrath
<c.r.mcgrath-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> The observer method only works in a controller. You can also do
> 
> MyObserver.instance
> 
> In config/environment.rb to make it work.
> 
> Chris
> 
> On Apr 5, 2005 11:21 PM, Nicholas Henry
<nicholas.henry-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > I have followed the Hieraki example of creating a separate file for
> > the observer class and defined the observer in the controller, for
> > example:
> >
> > # file my_observer.rb
> >
> > class MyObserver < ActiveRecord::Observer
> >
> > observe contact
> >
> >  def after_save(record)
> >    @record_class = record.class
> >    # some other processing
> > end
> >
> > end
> >
> > ---
> >
> > # file contact_controller.rb
> >
> > class ContactController < ApplicationController
> >
> >   model :Contact
> >   observer: my_observer
> >
> > # some more code
> >
> > end
> >
> > Also, I have done a breakpoint to inspect the local variable
"record"
> > in the observer and it does return what I would expect with the right
> > class name. Also I did a record.methods which included all the methods
> > I would expect, including "class".
> >
> > Cheers,
> > Nicholas
> >
> >
> > On Apr 4, 2005 1:16 PM, Lucas Carlson
<rails-1eRuzFDw/cg@public.gmane.org> wrote:
> > > In what file have you defined your observer? It seems like the
observer
> > > class doesn''t have access to the class definitions in
the rest of your
> > > Rails app.
> > >
> > > -Lucas
> > > http://www.rufy.com/
> > >
> > > On Apr 4, 2005, at 9:47 AM, Nicholas Henry wrote:
> > >
> > > > I''m trying to get the class from an observer, for
example:
> > > >
> > > > class MyObserver < ActiveRecord::Observer
> > > >
> > > >   observe contact, organization
> > > >
> > > >   def after_save(record)
> > > >     @record_class = record.class
> > > >     # some other processing
> > > >  end
> > > >
> > > > end
> > > >
> > > > Being new to Ruby and Rails I''m a little unsure why
I get a TypeError
> > > > of
> > > >
> > > > can''t dump anonymous class Class
> > > >
> > > > I have seen a discussion on this which leaves me a little
blank ;)
> > > >
> > > >
http://www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/128531
> > > >
> > > > any ideas on how to get this functionality working in some
capactity
> > > > would be much appreciated.
> > > >
> > > > Thank you,
> > > > Nicholas
> > > > _______________________________________________
> > > > Rails mailing list
> > > > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > > > http://lists.rubyonrails.org/mailman/listinfo/rails
> > >
> > >
> > _______________________________________________
> > Rails mailing list
> > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>