Rails正则表达式验证字符串转义

Question

I have a name attribute in my model which is validated by

validates :name ,format:{with: /^[\p{L} \.'\-]+$/ , message: "invalid name" }

The following syntax error was found while creating an object of the model

SyntaxError (basic_info.rb:8: invalid  property name {L}: /^[\p{L} \.'\-]+$/

Apparently Ruby is trying to evaluate {L} inside the regex which is undefined. Also inserting escape characters inside the regex would make it invalid.

Answer 1

Edit: According to this post it's to do with encoding. Pre-Ruby 2.0.0, the default encoding for ruby scripts is not Unicode, so this'll be causing you issues when using a unicode character property regexp pattern ( \\p{L} for example!).

You need to put the magic # encoding: utf-8 comment at the top of your file.

---

I just did a quick IRB test, but are you using Ruby 1.8.7 by any chance?

In 1.8.7:

>> "blah".match(/^[\p{L} \.'\-]+$/)
=> nil

in 2.0.0:

>> "blah".match(/^[\p{L} \.\-']+$/)
=> #<MatchData "blah">

Seems 1.8.7 Regexp doesn't support unicode character properties? Consider using /^[a-zA-Z \\.'\\-]+$/ instead.