gistfile1.txt

# 使わせていただきます https://github.com/binarylogic/authlogic/blob/master/lib/authlogic/regex.rb
# user idの正規表現
    # A simple regular expression that only allows for letters, numbers, spaces, and .-_@. Just a standard login / username
    # regular expression.
    def self.login
      /\A\w[\w\.+\-_@ ]+\z/
    end