Rails - Jan 2009 - monkey patches to a method that exists in a plugin

Say I have a plugin like so:

class Plugin
  def do_something
     do_thing :one
     do_something_else
     do_thing :two
  end
end

If I want to wrap the call to do_something_else in a begin/rescue
block, then it would seem that I need to either hack the plugin in
vendor/ or put a patch in lib/ that copies a portion of do_something.
Either way, it seems I lose on maintainability.


Is there a convention/method for monkey patching existing methods in
plugins in these situations?

Thanks,
Tom Macklin
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On 8 Jan 2009, at 16:37, Tom M wrote:
>
> Say I have a plugin like so:
>
> class Plugin
>  def do_something
>     do_thing :one
>     do_something_else
>     do_thing :two
>  end
> end
>
> If I want to wrap the call to do_something_else in a begin/rescue
> block, then it would seem that I need to either hack the plugin in
> vendor/ or put a patch in lib/ that copies a portion of do_something.
> Either way, it seems I lose on maintainability.
>
>
The mighty alias_method_chain (which is really just 2 calls to  
alias_method) can work here


class Plugin
   def do_something_else_with_rescue
     begin
       do_something_else_without_rescue
     rescue ...
     end
   end
   alias_method_chain :do_something_else, :rescue
end

> Is there a convention/method for monkey patching existing methods in
> plugins in these situations?
>
> Thanks,
> Tom Macklin
> >

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