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comp.lang.ruby

Problems with catching an exception...

Joshua Muheim

10/14/2007 10:09:00 AM

Hi all

I'm having some basic newbie problem with catching an exception.
The following code does not seem to catch the URI::InvalidURIError,
because the line record.errors.add... is never executed.

def validates_url_form_of(*attr_names)
attr_name = attr_names.first.to_s

validates_each(attr_name) do |record, attr_name, value|
uri = URI.parse(record.send(attr_name.to_sym))
if uri.class != URI::HTTP
record.errors.add(attr_name, 'Only HTTP protocol addresses can
be used')
end
end
rescue URI::InvalidURIError
errors.add(attr_name, 'The format of the url is not valid.')
end

I tried it the following way:

def validates_url_form_of(*attr_names)
attr_name = attr_names.first.to_s

validates_each(attr_name) do |record, attr_name, value|
uri = URI.parse(record.send(attr_name.to_sym))
if uri.class != URI::HTTP
record.errors.add(attr_name, 'Only HTTP protocol addresses can
be used')
end
rescue URI::InvalidURIError
errors.add(attr_name, 'The format of the url is not valid.')
end
end
end

But this gives me a syntax error.

What am I missing?

Thanks a lot.
Josh
--
Posted via http://www.ruby-....
2 Answers

Sylvain Joyeux

10/14/2007 10:23:00 AM

0

"rescue" clauses should be either part of a def ... end construct like this


def my_method
...
rescue URI::InvalidURIError
end

or -- and it is your case here -- in a begin ... end construct like this


begin
<code which raises>
rescue URI::InvalidURIError
end

--
Sylvain Joyeux

Joshua Muheim

10/14/2007 11:57:00 AM

0

Thank you. :-)
--
Posted via http://www.ruby-....