Why are anchor characters not allowed in routing requirements?

Rails
1

hi,

I have a route which says:

UUID_REGEX =
/^([0-9a-f]{8})-([0-9a-f]{4})-([0-9a-f]{4})-([0-9a-f]{2})([0-9a-f]{2})-([0-9a-f]{12})$/

resources :checkout, :only => [:show, :create], :constraints => { :id =>
UUID_REGEX }

I get an error saying:
Regexp anchor characters are not allowed in routing requirements

full stacktrace is at config_routes.rb · GitHub

Why are anchor characters not allowed in routing requirements ?

I am using Rails 3.2.11

–
deepak

2

from http://www.stephensykes.com/blog_perm.html?133

This is because these regexes are now automatically anchored at the
start and end of the path component. Just removing the anchors from your
regex fixes it.

–
Dheeraj K.

3

ah. thanks Dheeraj

that was one old article :slight_smile:
but still useful

4

rails guides also mentions it on