Rails 3 路由约束似乎没有正确匹配正则表达式
我正在使用 Rails 3.0.5，并且我已经使用正则表达式约束设置了一条路线。它曾经在 Rails 2.3.5 上工作，但在 Rails 3 中不起作用。路线如下所示：
get '/:version_id' => 'pastes#show', :constraints => { :version_id => /[\d\w]{40}/ }
它根本不起作用。然而，以下工作：
get '/:version_id' => 'pastes#show', :constraints => { :version_id => /.{40}/ }
get '/:version_id' => 'pastes#show', :constraints => { :version_id => /\w{40}/ }
get '/:version_id' => 'pastes#show'
Rails 处理 [ ] 匹配的方式是否有问题？或者我做错了什么？
version_id 通常看起来像这样：
816616001d7ce848944a9e0d71a5a22d3b546943
I am using Rails 3.0.5 and I have setup a route using a regex constraint. It used to work on Rails 2.3.5, but it's not working in Rails 3. The route looks like this:
get '/:version_id' => 'pastes#show', :constraints => { :version_id => /[\d\w]{40}/ }
It doesn't work at all. However, the following work:
get '/:version_id' => 'pastes#show', :constraints => { :version_id => /.{40}/ }
get '/:version_id' => 'pastes#show', :constraints => { :version_id => /\w{40}/ }
get '/:version_id' => 'pastes#show'
Is there something wrong with the way Rails handles [ ] matching? or am I doing something wrong?
version_id usually looks something like this:
816616001d7ce848944a9e0d71a5a22d3b546943
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我没有办法解释为什么一个可能无法胜过另一个。
然而，根据 PickAxe 书，
\w实际上是\d的超集。因此，
[\d\w]{40}与适合您的\w{40}没有什么不同。I don't have a solution as to why one may not work over the other.
However, according to the PickAxe book,
\wis actually a superset of\d.Therefore,
[\d\w]{40}is no different from\w{40}, which works for you.