Flowdock
method

fragment_cache_key

Importance_2
Ruby on Rails latest stable (v5.2.3) - 0 notes - Class: ClassMethods
fragment_cache_key(value = nil, &key) public

Allows you to specify controller-wide key prefixes for cache fragments. Pass either a constant value, or a block which computes a value each time a cache key is generated.

For example, you may want to prefix all fragment cache keys with a global version identifier, so you can easily invalidate all caches.

class ApplicationController
  fragment_cache_key "v1"
end

When it’s time to invalidate all fragments, simply change the string constant. Or, progressively roll out the cache invalidation using a computed value:

class ApplicationController
  fragment_cache_key do
    @account.id.odd? ? "v1" : "v2"
  end
end
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