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I am running Ruby on Rails 3.0.10 and Ruby 1.9.2. I am using the following Regex in order to match names:
NAME_REGEX = /^[\w\s'"\-_&@!?()\[\]-]*$/u validates :name, :presence => true, :format => { :with => NAME_REGEX, :message => "format is invalid" } However, if I try to save some words like the followings:
Oilalà Pì Rùby ... # In few words, those with accented characters I have a validation error "Name format is invalid..
How can I change the above Regex so to match also accented characters like à, è, é, ì, ò, ù, ...?
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To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \ ). E.g., \. matches "." ; regex \+ matches "+" ; and regex \( matches "(" . You also need to use regex \\ to match "\" (back-slash).
$ means "Match the end of the string" (the position after the last character in the string).
replace(/[^a-z0-9]/gi,'') . However a more intuitive solution (at least for the user) would be to replace accented characters with their "plain" equivalent, e.g. turn á , á into a , and ç into c , etc.
Basically (0+1)* mathes any sequence of ones and zeroes. So, in your example (0+1)*1(0+1)* should match any sequence that has 1. It would not match 000 , but it would match 010 , 1 , 111 etc. (0+1) means 0 OR 1.
Instead of \w, use the POSIX bracket expression [:alpha:]:
"blåbær dèjá vu".scan /[[:alpha:]]+/ # => ["blåbær", "dèjá", "vu"] "blåbær dèjá vu".scan /\w+/ # => ["bl", "b", "r", "d", "j", "vu"] In your particular case, change the regex to this:
NAME_REGEX = /^[[:alpha:]\s'"\-_&@!?()\[\]-]*$/u This does match much more than just accented characters, though. Which is a good thing. Make sure you read this blog entry about common misconceptions regarding names in software applications.
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