Rails - Jun 2008 - Plugins - helper function is an "undefined method", Objects "can't be referred"

I''m modifying a shopping cart plugin, MinimalCart, and for some reason
I can add one item to the cart multiple times, but as soon as I add a
second item, all kinds of strange things start happening.

An actionview::template error is thrown because a method defined in
application_helper is "undefined"

What could cause a defined application helper method to all the sudden
not be defined?

here is the trace : http://pastie.org/211114

Thanks,
Nik
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On 8 Jun 2008, at 18:29, Nik B wrote:
>
> I''m modifying a shopping cart plugin, MinimalCart, and for some
reason
> I can add one item to the cart multiple times, but as soon as I add a
> second item, all kinds of strange things start happening.
>
> An actionview::template error is thrown because a method defined in
> application_helper is "undefined"
>
> What could cause a defined application helper method to all the sudden
> not be defined?
>
Does the problem go away if you turn on class caching in  
development.rb ? (and then restart the server)

Fred
> here is the trace : http://pastie.org/211114
>
> Thanks,
> Nik
> >

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> Does the problem go away if you turn on class caching in  
> development.rb ? (and then restart the server)
Yes it does! Mind explaining a little bit about how that might be
causing this issue?



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On Jun 8, 6:48 pm, Nik B
<nikbau...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> > Does the problem go away if you turn on class caching in  
> > development.rb ? (and then restart the server)
>
> Yes it does! Mind explaining a little bit about how that might be
> causing this issue?
Short version: when that setting is false your app is reloaded between
requests, but plugins aren''t. If a plugin is holding onto a class,
reference etc... from before the app gets reloaded then post-reload
it''s holding onto (essentially) junk. One way around is to make the
plugin be reloaded at the same time as the app
Long version: http://www.spacevatican.org/2008/5/28/reload-me-reload-me-not

Fred
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