expire_fragment

Removes fragments from the cache.

key can take one of three forms:

• String - This would normally take the form of a path, like "pages/45/notes".
• Hash - Treated as an implicit call to url_for, like {:controller => "pages", :action => "notes", :id => 45}
• Regexp - Will remove any fragment that matches, so %r{pages/\d*/notes} might remove all notes. Make sure you don’t use anchors in the regex (^ or $) because the actual filename matched looks like ./cache/filename/path.cache. Note: Regexp expiration is only supported on caches that can iterate over all keys (unlike memcached).

options is passed through to the cache store’s delete method (or delete_matched, for Regexp keys.)