Problems with catching an exception

Ruby
1

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

2

“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

rescue URI::InvalidURIError
end

3

Thank you. :slight_smile: