Rails - Mar 2006 - help: acts_as_versioned setup error "undefined local variable or method ''base_class''"

Hi All,

Rails newbie here trying to set up acts_as_versioned according to Chapter 14
in the Rails Recipies book.  I''ve taken the following steps (nearly
verbatim) as mentioned by the book:
- created the target model "Post"
- added the "acts_as_versioned" label to the model file
- generated a migration file
- added the table creation code and the command
"Post.create_versioned_table"
to the migration file
- ran "rake migrate"

What I got is the error "undefined local variable or method
''base_class'' for
Post:Class".  I tried with other models and kept getting the same error. 
It
seems like "rake migrate" is missing the right environment setup, and
thus
can''t find the Post class defined in the model file.  Is there some
step
I''ve overlooked?

Thanks a ton,
John

http://www.twobitoperation.com
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I''m having the same problem.  I then tried renaming all my rake files
to
make sure I didnt have any tasks that might be interferring with the
environment load.  I think that helped me get a little further since it now
dies on the "create_versioned_table" call.  It also seems that the
acts_as_versioned method isn''t being called even though I have it at
the top
of my model file.  It looks like "create_versioned_table" dies because
the
"versioned_table_name" (which is set in the main acts_as_versioned
method).

Any help would be appreciated.

Thanks,
Justin

On 3/19/06, john li <john.l.li@gmail.com> wrote:
>
> Hi All,
>
> Rails newbie here trying to set up acts_as_versioned according to Chapter
> 14 in the Rails Recipies book.  I''ve taken the following steps
(nearly
> verbatim) as mentioned by the book:
> - created the target model "Post"
> - added the "acts_as_versioned" label to the model file
> - generated a migration file
> - added the table creation code and the command "
> Post.create_versioned_table" to the migration file
> - ran "rake migrate"
>
> What I got is the error "undefined local variable or method
''base_class''
> for Post:Class".  I tried with other models and kept getting the same
> error.  It seems like "rake migrate" is missing the right
environment setup,
> and thus can''t find the Post class defined in the model file.  Is
there some
> step I''ve overlooked?
>
> Thanks a ton,
> John
>
> http://www.twobitoperation.com
>
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
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Has there been any progress on this? I''m having a similar problem
running my
rake migration for creating my versioned_table.

Steve
http://www.smarkets.net

On 3/20/06, Justin Chen <justin.h.chen@gmail.com>
wrote:
>
> I''m having the same problem.  I then tried renaming all my rake
files to
> make sure I didnt have any tasks that might be interferring with the
> environment load.  I think that helped me get a little further since it now
> dies on the "create_versioned_table" call.  It also seems that
the
> acts_as_versioned method isn''t being called even though I have it
at the
> top of my model file.  It looks like "create_versioned_table"
dies because
> the "versioned_table_name" (which is set in the main
acts_as_versionedmethod).
>
> Any help would be appreciated.
>
> Thanks,
> Justin
>
> On 3/19/06, john li <john.l.li@gmail.com> wrote:
>
> > Hi All,
>
> Rails newbie here trying to set up acts_as_versioned according to Chapter
> 14 in the Rails Recipies book.  I''ve taken the following steps
(nearly
> verbatim) as mentioned by the book:
> - created the target model "Post"
> - added the "acts_as_versioned" label to the model file
> - generated a migration file
> - added the table creation code and the command "
> Post.create_versioned_table" to the migration file
> - ran "rake migrate"
>
> What I got is the error "undefined local variable or method
''base_class''
> for Post:Class".  I tried with other models and kept getting the same
> error.  It seems like "rake migrate" is missing the right
environment setup,
> and thus can''t find the Post class defined in the model file.  Is
there some
> step I''ve overlooked?
>
> Thanks a ton,
> John
>
> http://www.twobitoperation.com
>
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
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I''ve been harassed by this problem, but not consistently.  I think,
however,
that I''ve found a possible cause.

If you''re running emacs or some other development environement where
you
could have multiple buffers open, some buffers may not be fresh views of
what''s actually on disk.  If you run script/generate migrate <your
table
name> or script/generate model <your table name> ...

... then you might have overwritten you model file, especially if you just
hit enter whenever prompted.  So that acts_as_versioned you see in your code
might not be there.
Hope this saves someone the hour I just spent kicking every tire in my code
before I finally found this.
Trevor

On 3/23/06, Steve Odom <steve.odom@gmail.com>
wrote:
>
> Has there been any progress on this? I''m having a similar problem
running
> my rake migration for creating my versioned_table.
>
> Steve
> http://www.smarkets.net
>
>
> On 3/20/06, Justin Chen <justin.h.chen@gmail.com> wrote:
> >
> > I''m having the same problem.  I then tried renaming all my
rake files to
> > make sure I didnt have any tasks that might be interferring with the
> > environment load.  I think that helped me get a little further since
it now
> > dies on the "create_versioned_table" call.  It also seems
that the
> > acts_as_versioned method isn''t being called even though I
have it at the
> > top of my model file.  It looks like
"create_versioned_table" dies because
> > the "versioned_table_name" (which is set in the main
acts_as_versionedmethod).
> >
> > Any help would be appreciated.
> >
> > Thanks,
> > Justin
> >
> > On 3/19/06, john li <john.l.li@gmail.com> wrote:
> >
> > > Hi All,
> >
> > Rails newbie here trying to set up acts_as_versioned according to
> > Chapter 14 in the Rails Recipies book.  I''ve taken the
following steps
> > (nearly verbatim) as mentioned by the book:
> > - created the target model "Post"
> > - added the "acts_as_versioned" label to the model file
> > - generated a migration file
> > - added the table creation code and the command "
> > Post.create_versioned_table" to the migration file
> > - ran "rake migrate"
> >
> > What I got is the error "undefined local variable or method
''base_class''
> > for Post:Class".  I tried with other models and kept getting the
same
> > error.  It seems like "rake migrate" is missing the right
environment setup,
> > and thus can''t find the Post class defined in the model file.
Is there some
> > step I''ve overlooked?
> >
> > Thanks a ton,
> > John
> >
> > http://www.twobitoperation.com
> >
> >
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> >
> >
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> >
> >
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
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