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Defining an error handler for a particular exception
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Alberto  
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 More options Feb 23 2006, 8:29 am
From: "Alberto" <albe...@toscat.net>
Date: Thu, 23 Feb 2006 05:29:33 -0800
Local: Thurs, Feb 23 2006 8:29 am
Subject: Defining an error handler for a particular exception
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Hi,

I've just started playing with the new error handling mechanisms
recently introduced (which BTW look great :)

I have a, probably dumb, question:

How can I set a decorator for a method which redirects to another when
a particular exception occurs?

That is:

@error_handler(if exception is Y branch to method X)
def method:
    # some code that could raise Y

def X:
    # do something with the exception

I implicitly believed this could be done from skimming the
error_handling thread a couple of weeks ago but I can't seem to  find
the post where (i believe) it said it or how to do it.

TIA,
Alberto


 
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Alberto  
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 More options Feb 23 2006, 8:52 am
From: "Alberto" <albe...@toscat.net>
Date: Thu, 23 Feb 2006 05:52:58 -0800
Local: Thurs, Feb 23 2006 8:52 am
Subject: Re: Defining an error handler for a particular exception
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Duh, shhould have read the errorhadling wiki before posting...

Ive managed to do it like:

class Root(controllers.RootController):
    @turbogears.expose()
    def error(self):
        return "An error ocured"

    @turbogears.expose()
    @turbogears.controllers.exception_handler(error, "ValueError")
    def index(self):
        raise ValueError

BTW, Shouldn't exception_handler be imported at turbogears/__init__ too
like error_handler is, just for convenience...

Regards,
 Alberto


 
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Simon Belak  
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 More options Feb 23 2006, 10:02 am
From: Simon Belak <simon.be...@hruska.si>
Date: Thu, 23 Feb 2006 16:02:03 +0100
Local: Thurs, Feb 23 2006 10:02 am
Subject: Re: [TurboGears] Re: Defining an error handler for a particular exception
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Alberto wrote:
> Duh, shhould have read the errorhadling wiki before posting...

> Ive managed to do it like:

> class Root(controllers.RootController):
>     @turbogears.expose()
>     def error(self):
>         return "An error ocured"

>     @turbogears.expose()
>     @turbogears.controllers.exception_handler(error, "ValueError")
>     def index(self):
>         raise ValueError

Are you sure, this works as expecetd?

Perhaps

   "isinstance(tg_exceptions, ValueError)"

will serve you better.

> BTW, Shouldn't exception_handler be imported at turbogears/__init__ too
> like error_handler is, just for convenience...

Yes it should be (and is). Which version are you using?

Cheers,
Simon


 
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Alberto  
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 More options Feb 23 2006, 10:26 am
From: "Alberto" <albe...@toscat.net>
Date: Thu, 23 Feb 2006 07:26:08 -0800
Local: Thurs, Feb 23 2006 10:26 am
Subject: Re: Defining an error handler for a particular exception
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Actually I was just wondering why it didn't work as expected... :) It
first seemed so, but it was handling ALL exceptions... I'm going to try
your example...

Thanks for the help!

Alberto

P.S: Using r825, i've locally patched my turbogears/__init__.py with:
exception_handler = controllers.exception_handler
and works for me


 
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Simon Belak  
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 More options Feb 23 2006, 10:38 am
From: Simon Belak <simon.be...@hruska.si>
Date: Thu, 23 Feb 2006 16:38:46 +0100
Local: Thurs, Feb 23 2006 10:38 am
Subject: Re: [TurboGears] Re: Defining an error handler for a particular exception
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Alberto wrote:

  > P.S: Using r825, i've locally patched my turbogears/__init__.py with:

> exception_handler = controllers.exception_handler
> and works for me

I am such an idiot! Of curse, the line above is missing. Thanks!

Cheers,
Simon


 
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Alberto  
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 More options Feb 23 2006, 10:39 am
From: "Alberto" <albe...@toscat.net>
Date: Thu, 23 Feb 2006 07:39:13 -0800
Local: Thurs, Feb 23 2006 10:39 am
Subject: Re: Defining an error handler for a particular exception
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Works like a charm now... Thanks

P.S.

Are you sure it was imported?? I'm looking through the rev. log and
can't seem to find it...


 
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