Cannot extend class in Application Helper


#1

Looking for some help with extending existing classes.

In a view I have

<%=h bmevent.node %>. I need further
processing on the output and added a helper:

module ApplicationHelper
class String
def a
self[ /^[^\0]*/ ]
end
end
end

and

<%=h bmevent.node.a %> results in an undefined method `a’
for #String:0xb6c8105c error.

What am I doing wrong?

The helper is correctly found, since

module ApplicationHelper
def b(text)
text[ /^[^\0]*/ ]
end
end

and

<%=b bmevent.node.a %> produce the desired result, but
this is (for other reasons) not what I want. I want to extend class
string and use the postfix notation as in the first example.

Any ideas ?


#2

On 26 Jan 2009, at 22:25, X wrote:

end
end
end

That does not extend the String class. It defines a new class
ApplicationHelper::String with an instance method a.
I would have a method like that in a file somewhere in lib (eg lib/
my_extensions.rb) and require that from an initializer. You could
‘fix’ it by pulling that out of the ApplicationHelper module and
putting it at the bottom of the file but that’s a bit horrible.

Fred


#3

Case closed. Thanx. a lot.